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Help measuring freq of 2m rig?
I live about 15 miles from the N0KTA 146.715
repeater. I like to talk to the 146.700 repeater in Pratt, KS (about 95 miles). Problem is that when I transmit on 146.100 for the Pratt machine, I inadvertantly also key up the 146.715 machine. At first I suspected my transmitter was off freq so I tested 3 other repeaters - 145.370 at 1/2 mile away, 146.895 at 1 mile away and 146.850 at 3 miles away. On all three tests, I could key up those machines as long as I was +/- LESS than 15 khz from the correct input freq. On all 3 when I went to the next channel (15 khz spacing) up or down, I could not key up the machine. I also did a simplex test with an OP about 1/2 mile away. I tx'ed DTMF #5 for 30 seconds while he moved above and below my freq. He reported he lost my signal as soon as he got more than 10 khz from me. He also reported that the signal levels at 10 khz were equal between + and - . All these tests were done with a known good antenna & new CQ-102 coax. Rig is a 1 year old Kenwood TM-271A. All tests were done at an indicated 68 w which is about normal for hi power from this rig. I'll refrain from using the Pratt repeater until this is fixed. My question is this - have I done enough to assume that the problem is not on my end? Sending in my rig for service monitor testing would be difficult & a genuine pain in the neck. Ken KG0WX |
"Ken Bessler" wrote in message
news:rYHod.1792$3I.1128@okepread01... I live about 15 miles from the N0KTA 146.715 repeater. I like to talk to the 146.700 repeater in Pratt, KS (about 95 miles). Problem is that when I transmit on 146.100 for the Pratt machine, I inadvertantly also key up the 146.715 machine. At first I suspected my transmitter was off freq so I tested 3 other repeaters - 145.370 at 1/2 mile away, 146.895 at 1 mile away and 146.850 at 3 miles away. On all three tests, I could key up those machines as long as I was +/- LESS than 15 khz from the correct input freq. On all 3 when I went to the next channel (15 khz spacing) up or down, I could not key up the machine. I also did a simplex test with an OP about 1/2 mile away. I tx'ed DTMF #5 for 30 seconds while he moved above and below my freq. He reported he lost my signal as soon as he got more than 10 khz from me. He also reported that the signal levels at 10 khz were equal between + and - . All these tests were done with a known good antenna & new CQ-102 coax. Rig is a 1 year old Kenwood TM-271A. All tests were done at an indicated 68 w which is about normal for hi power from this rig. I'll refrain from using the Pratt repeater until this is fixed. My question is this - have I done enough to assume that the problem is not on my end? Sending in my rig for service monitor testing would be difficult & a genuine pain in the neck. Ken KG0WX Since you've tested with *very* close repeaters and not interfered with them, it isn't your set. It's more likely inadequate filtering at the 146.715 repeater which is keying up on your adjacent channel signal. To prove this try another set at your location; also try your set (and another, pref.) at various locations around the area to confirm this. You could also try with low power from your (and another?) set. To *really* confirm that you aren't putting out spurii you need to get hold of a spectrum analyser; a VHF radio test set would do this, but I'm a little far to help. :-) Doubtless there's someone a little closer with the correct gear to help out if it becomes a requirement, but I don't think it is. Cheers. Ken VK3KCT / ZL1WKT |
"Ken Bessler" wrote in message
news:rYHod.1792$3I.1128@okepread01... I live about 15 miles from the N0KTA 146.715 repeater. I like to talk to the 146.700 repeater in Pratt, KS (about 95 miles). Problem is that when I transmit on 146.100 for the Pratt machine, I inadvertantly also key up the 146.715 machine. At first I suspected my transmitter was off freq so I tested 3 other repeaters - 145.370 at 1/2 mile away, 146.895 at 1 mile away and 146.850 at 3 miles away. On all three tests, I could key up those machines as long as I was +/- LESS than 15 khz from the correct input freq. On all 3 when I went to the next channel (15 khz spacing) up or down, I could not key up the machine. I also did a simplex test with an OP about 1/2 mile away. I tx'ed DTMF #5 for 30 seconds while he moved above and below my freq. He reported he lost my signal as soon as he got more than 10 khz from me. He also reported that the signal levels at 10 khz were equal between + and - . All these tests were done with a known good antenna & new CQ-102 coax. Rig is a 1 year old Kenwood TM-271A. All tests were done at an indicated 68 w which is about normal for hi power from this rig. I'll refrain from using the Pratt repeater until this is fixed. My question is this - have I done enough to assume that the problem is not on my end? Sending in my rig for service monitor testing would be difficult & a genuine pain in the neck. Ken KG0WX Since you've tested with *very* close repeaters and not interfered with them, it isn't your set. It's more likely inadequate filtering at the 146.715 repeater which is keying up on your adjacent channel signal. To prove this try another set at your location; also try your set (and another, pref.) at various locations around the area to confirm this. You could also try with low power from your (and another?) set. To *really* confirm that you aren't putting out spurii you need to get hold of a spectrum analyser; a VHF radio test set would do this, but I'm a little far to help. :-) Doubtless there's someone a little closer with the correct gear to help out if it becomes a requirement, but I don't think it is. Cheers. Ken VK3KCT / ZL1WKT |
"Ken Bessler" wrote in message
news:rYHod.1792$3I.1128@okepread01... I live about 15 miles from the N0KTA 146.715 repeater. I like to talk to the 146.700 repeater in Pratt, KS (about 95 miles). Problem is that when I transmit on 146.100 for the Pratt machine, I inadvertantly also key up the 146.715 machine. At first I suspected my transmitter was off freq so I tested 3 other repeaters - 145.370 at 1/2 mile away, 146.895 at 1 mile away and 146.850 at 3 miles away. On all three tests, I could key up those machines as long as I was +/- LESS than 15 khz from the correct input freq. On all 3 when I went to the next channel (15 khz spacing) up or down, I could not key up the machine. I also did a simplex test with an OP about 1/2 mile away. I tx'ed DTMF #5 for 30 seconds while he moved above and below my freq. He reported he lost my signal as soon as he got more than 10 khz from me. He also reported that the signal levels at 10 khz were equal between + and - . All these tests were done with a known good antenna & new CQ-102 coax. Rig is a 1 year old Kenwood TM-271A. All tests were done at an indicated 68 w which is about normal for hi power from this rig. I'll refrain from using the Pratt repeater until this is fixed. My question is this - have I done enough to assume that the problem is not on my end? Sending in my rig for service monitor testing would be difficult & a genuine pain in the neck. Ken KG0WX Since you've tested with *very* close repeaters and not interfered with them, it isn't your set. It's more likely inadequate filtering at the 146.715 repeater which is keying up on your adjacent channel signal. To prove this try another set at your location; also try your set (and another, pref.) at various locations around the area to confirm this. You could also try with low power from your (and another?) set. To *really* confirm that you aren't putting out spurii you need to get hold of a spectrum analyser; a VHF radio test set would do this, but I'm a little far to help. :-) Doubtless there's someone a little closer with the correct gear to help out if it becomes a requirement, but I don't think it is. Cheers. Ken VK3KCT / ZL1WKT |
Ken Bessler wrote: All these tests were done with a known good antenna & new CQ-102 coax. Rig is a 1 year old Kenwood TM-271A. All tests were done at an indicated 68 w which is about normal for hi power from this rig. I'll refrain from using the Pratt repeater until this is fixed. My question is this - have I done enough to assume that the problem is not on my end? Sending in my rig for service monitor testing would be difficult & a genuine pain in the neck. Ken KG0WX The only way to determine your rigs frequency would be to put it on a service monitor or at the least, a frequency counter. I have 3 service monitors and would be glad to check your rig free of charge if you pay postage both ways. My test equipment is calibrated to an HP GPS frequency standard so I can give you a pretty accurate measurement. 73 Andy WD4KDN -- "I didn't attend the funeral, but I sent a nice letter saying that I approved of it." ”- Mark Twain |
Ken Bessler wrote: All these tests were done with a known good antenna & new CQ-102 coax. Rig is a 1 year old Kenwood TM-271A. All tests were done at an indicated 68 w which is about normal for hi power from this rig. I'll refrain from using the Pratt repeater until this is fixed. My question is this - have I done enough to assume that the problem is not on my end? Sending in my rig for service monitor testing would be difficult & a genuine pain in the neck. Ken KG0WX The only way to determine your rigs frequency would be to put it on a service monitor or at the least, a frequency counter. I have 3 service monitors and would be glad to check your rig free of charge if you pay postage both ways. My test equipment is calibrated to an HP GPS frequency standard so I can give you a pretty accurate measurement. 73 Andy WD4KDN -- "I didn't attend the funeral, but I sent a nice letter saying that I approved of it." ”- Mark Twain |
Ken Bessler wrote: All these tests were done with a known good antenna & new CQ-102 coax. Rig is a 1 year old Kenwood TM-271A. All tests were done at an indicated 68 w which is about normal for hi power from this rig. I'll refrain from using the Pratt repeater until this is fixed. My question is this - have I done enough to assume that the problem is not on my end? Sending in my rig for service monitor testing would be difficult & a genuine pain in the neck. Ken KG0WX The only way to determine your rigs frequency would be to put it on a service monitor or at the least, a frequency counter. I have 3 service monitors and would be glad to check your rig free of charge if you pay postage both ways. My test equipment is calibrated to an HP GPS frequency standard so I can give you a pretty accurate measurement. 73 Andy WD4KDN -- "I didn't attend the funeral, but I sent a nice letter saying that I approved of it." ”- Mark Twain |
"nitespark" wrote in message news:ymQod.4883$1t.4522@lakeread07... Ken Bessler wrote: All these tests were done with a known good antenna & new CQ-102 coax. Rig is a 1 year old Kenwood TM-271A. All tests were done at an indicated 68 w which is about normal for hi power from this rig. I'll refrain from using the Pratt repeater until this is fixed. My question is this - have I done enough to assume that the problem is not on my end? Sending in my rig for service monitor testing would be difficult & a genuine pain in the neck. Ken KG0WX The only way to determine your rigs frequency would be to put it on a service monitor or at the least, a frequency counter. I have 3 service monitors and would be glad to check your rig free of charge if you pay postage both ways. My test equipment is calibrated to an HP GPS frequency standard so I can give you a pretty accurate measurement. 73 Andy WD4KDN I resolved the question with testing. I had 5 other stations all over the county try the same trick - I.E. transmitting 15kc below the input to the N0KTA repeater. All 5 were able to make the repeater key up easily. That plus the fact that my TM-271A comes standard with a TXCO and the simplex tests I've done has convinced me that it's NOT my rig. I contacted N0KTA but haven't gotten an answer yet. Thanks to all for the advice & help. 73's de Ken KG0WX |
"nitespark" wrote in message news:ymQod.4883$1t.4522@lakeread07... Ken Bessler wrote: All these tests were done with a known good antenna & new CQ-102 coax. Rig is a 1 year old Kenwood TM-271A. All tests were done at an indicated 68 w which is about normal for hi power from this rig. I'll refrain from using the Pratt repeater until this is fixed. My question is this - have I done enough to assume that the problem is not on my end? Sending in my rig for service monitor testing would be difficult & a genuine pain in the neck. Ken KG0WX The only way to determine your rigs frequency would be to put it on a service monitor or at the least, a frequency counter. I have 3 service monitors and would be glad to check your rig free of charge if you pay postage both ways. My test equipment is calibrated to an HP GPS frequency standard so I can give you a pretty accurate measurement. 73 Andy WD4KDN I resolved the question with testing. I had 5 other stations all over the county try the same trick - I.E. transmitting 15kc below the input to the N0KTA repeater. All 5 were able to make the repeater key up easily. That plus the fact that my TM-271A comes standard with a TXCO and the simplex tests I've done has convinced me that it's NOT my rig. I contacted N0KTA but haven't gotten an answer yet. Thanks to all for the advice & help. 73's de Ken KG0WX |
"nitespark" wrote in message news:ymQod.4883$1t.4522@lakeread07... Ken Bessler wrote: All these tests were done with a known good antenna & new CQ-102 coax. Rig is a 1 year old Kenwood TM-271A. All tests were done at an indicated 68 w which is about normal for hi power from this rig. I'll refrain from using the Pratt repeater until this is fixed. My question is this - have I done enough to assume that the problem is not on my end? Sending in my rig for service monitor testing would be difficult & a genuine pain in the neck. Ken KG0WX The only way to determine your rigs frequency would be to put it on a service monitor or at the least, a frequency counter. I have 3 service monitors and would be glad to check your rig free of charge if you pay postage both ways. My test equipment is calibrated to an HP GPS frequency standard so I can give you a pretty accurate measurement. 73 Andy WD4KDN I resolved the question with testing. I had 5 other stations all over the county try the same trick - I.E. transmitting 15kc below the input to the N0KTA repeater. All 5 were able to make the repeater key up easily. That plus the fact that my TM-271A comes standard with a TXCO and the simplex tests I've done has convinced me that it's NOT my rig. I contacted N0KTA but haven't gotten an answer yet. Thanks to all for the advice & help. 73's de Ken KG0WX |
On Tue, 23 Nov 2004 08:39:14 -0600, "Ken Bessler"
wrote: Sending in my rig for service monitor testing would be difficult & a genuine pain in the neck. Ken KG0WX Know anyone with a frequency counter? Hold one of those fairly close to your antenna while transmitting, and it should give you your transmit frequency. I notice my MFJ antenna analyzer also has a frequency counter input, if you know anyone with an analyzer. bob k5qwg |
On Tue, 23 Nov 2004 08:39:14 -0600, "Ken Bessler"
wrote: Sending in my rig for service monitor testing would be difficult & a genuine pain in the neck. Ken KG0WX Know anyone with a frequency counter? Hold one of those fairly close to your antenna while transmitting, and it should give you your transmit frequency. I notice my MFJ antenna analyzer also has a frequency counter input, if you know anyone with an analyzer. bob k5qwg |
On Tue, 23 Nov 2004 08:39:14 -0600, "Ken Bessler"
wrote: Sending in my rig for service monitor testing would be difficult & a genuine pain in the neck. Ken KG0WX Know anyone with a frequency counter? Hold one of those fairly close to your antenna while transmitting, and it should give you your transmit frequency. I notice my MFJ antenna analyzer also has a frequency counter input, if you know anyone with an analyzer. bob k5qwg |
On Wed, 24 Nov 2004 00:17:22 -0500, "L."
wrote: "Bob Miller" wrote in message .. . On Tue, 23 Nov 2004 08:39:14 -0600, "Ken Bessler" wrote: Sending in my rig for service monitor testing would be difficult & a genuine pain in the neck. Ken KG0WX Know anyone with a frequency counter? Hold one of those fairly close to your antenna while transmitting, and it should give you your transmit frequency. I notice my MFJ antenna analyzer also has a frequency counter input, if you know anyone with an analyzer. bob k5qwg Unless the counter isn't worth a crap, you don't need to hold it "next" to the antenna. It should measure it out of the air. Unless you're using a rubber duck that sucks to start with. Most counters are pretty sensitive. L. My MFJ-886 counter is sometimes sensitive, and sometimes not. Barely measures the output of a QRP hf rig. A little better with a 25 watt vhf/uhf dual bander. Okay with a 100 watt hf rig. Depends on the rig... Bob k5qwg |
On Wed, 24 Nov 2004 00:17:22 -0500, "L."
wrote: "Bob Miller" wrote in message .. . On Tue, 23 Nov 2004 08:39:14 -0600, "Ken Bessler" wrote: Sending in my rig for service monitor testing would be difficult & a genuine pain in the neck. Ken KG0WX Know anyone with a frequency counter? Hold one of those fairly close to your antenna while transmitting, and it should give you your transmit frequency. I notice my MFJ antenna analyzer also has a frequency counter input, if you know anyone with an analyzer. bob k5qwg Unless the counter isn't worth a crap, you don't need to hold it "next" to the antenna. It should measure it out of the air. Unless you're using a rubber duck that sucks to start with. Most counters are pretty sensitive. L. My MFJ-886 counter is sometimes sensitive, and sometimes not. Barely measures the output of a QRP hf rig. A little better with a 25 watt vhf/uhf dual bander. Okay with a 100 watt hf rig. Depends on the rig... Bob k5qwg |
On Wed, 24 Nov 2004 00:17:22 -0500, "L."
wrote: "Bob Miller" wrote in message .. . On Tue, 23 Nov 2004 08:39:14 -0600, "Ken Bessler" wrote: Sending in my rig for service monitor testing would be difficult & a genuine pain in the neck. Ken KG0WX Know anyone with a frequency counter? Hold one of those fairly close to your antenna while transmitting, and it should give you your transmit frequency. I notice my MFJ antenna analyzer also has a frequency counter input, if you know anyone with an analyzer. bob k5qwg Unless the counter isn't worth a crap, you don't need to hold it "next" to the antenna. It should measure it out of the air. Unless you're using a rubber duck that sucks to start with. Most counters are pretty sensitive. L. My MFJ-886 counter is sometimes sensitive, and sometimes not. Barely measures the output of a QRP hf rig. A little better with a 25 watt vhf/uhf dual bander. Okay with a 100 watt hf rig. Depends on the rig... Bob k5qwg |
"Bob Miller" wrote in message ... On Wed, 24 Nov 2004 00:17:22 -0500, "L." wrote: "Bob Miller" wrote in message . .. On Tue, 23 Nov 2004 08:39:14 -0600, "Ken Bessler" wrote: Sending in my rig for service monitor testing would be difficult & a genuine pain in the neck. Ken KG0WX Know anyone with a frequency counter? Hold one of those fairly close to your antenna while transmitting, and it should give you your transmit frequency. I notice my MFJ antenna analyzer also has a frequency counter input, if you know anyone with an analyzer. bob k5qwg Unless the counter isn't worth a crap, you don't need to hold it "next" to the antenna. It should measure it out of the air. Unless you're using a rubber duck that sucks to start with. Most counters are pretty sensitive. L. My MFJ-886 counter is sometimes sensitive, and sometimes not. Barely measures the output of a QRP hf rig. A little better with a 25 watt vhf/uhf dual bander. Okay with a 100 watt hf rig. Depends on the rig... Bob k5qwg Thanks for the heads up, I'll know not to buy one of those! The counters I use pick up just about anything. Actually, in some cases, they're too sensitive and I have to take measures to avoid that aspect. L. |
"Bob Miller" wrote in message ... On Wed, 24 Nov 2004 00:17:22 -0500, "L." wrote: "Bob Miller" wrote in message . .. On Tue, 23 Nov 2004 08:39:14 -0600, "Ken Bessler" wrote: Sending in my rig for service monitor testing would be difficult & a genuine pain in the neck. Ken KG0WX Know anyone with a frequency counter? Hold one of those fairly close to your antenna while transmitting, and it should give you your transmit frequency. I notice my MFJ antenna analyzer also has a frequency counter input, if you know anyone with an analyzer. bob k5qwg Unless the counter isn't worth a crap, you don't need to hold it "next" to the antenna. It should measure it out of the air. Unless you're using a rubber duck that sucks to start with. Most counters are pretty sensitive. L. My MFJ-886 counter is sometimes sensitive, and sometimes not. Barely measures the output of a QRP hf rig. A little better with a 25 watt vhf/uhf dual bander. Okay with a 100 watt hf rig. Depends on the rig... Bob k5qwg Thanks for the heads up, I'll know not to buy one of those! The counters I use pick up just about anything. Actually, in some cases, they're too sensitive and I have to take measures to avoid that aspect. L. |
"Bob Miller" wrote in message ... On Wed, 24 Nov 2004 00:17:22 -0500, "L." wrote: "Bob Miller" wrote in message . .. On Tue, 23 Nov 2004 08:39:14 -0600, "Ken Bessler" wrote: Sending in my rig for service monitor testing would be difficult & a genuine pain in the neck. Ken KG0WX Know anyone with a frequency counter? Hold one of those fairly close to your antenna while transmitting, and it should give you your transmit frequency. I notice my MFJ antenna analyzer also has a frequency counter input, if you know anyone with an analyzer. bob k5qwg Unless the counter isn't worth a crap, you don't need to hold it "next" to the antenna. It should measure it out of the air. Unless you're using a rubber duck that sucks to start with. Most counters are pretty sensitive. L. My MFJ-886 counter is sometimes sensitive, and sometimes not. Barely measures the output of a QRP hf rig. A little better with a 25 watt vhf/uhf dual bander. Okay with a 100 watt hf rig. Depends on the rig... Bob k5qwg Thanks for the heads up, I'll know not to buy one of those! The counters I use pick up just about anything. Actually, in some cases, they're too sensitive and I have to take measures to avoid that aspect. L. |
It's good to see that you worked the problem out yourself. I'm amazed that
your signal made it through the cavities of the local repeater. Sound like the owner needs to do some duplexer tuning or get another set. Congratulations on solving your problem. Ken KC4IH "Ken Bessler" wrote in message news:tVSod.2461$3I.1347@okepread01... "nitespark" wrote in message news:ymQod.4883$1t.4522@lakeread07... Ken Bessler wrote: All these tests were done with a known good antenna & new CQ-102 coax. Rig is a 1 year old Kenwood TM-271A. All tests were done at an indicated 68 w which is about normal for hi power from this rig. I'll refrain from using the Pratt repeater until this is fixed. My question is this - have I done enough to assume that the problem is not on my end? Sending in my rig for service monitor testing would be difficult & a genuine pain in the neck. Ken KG0WX The only way to determine your rigs frequency would be to put it on a service monitor or at the least, a frequency counter. I have 3 service monitors and would be glad to check your rig free of charge if you pay postage both ways. My test equipment is calibrated to an HP GPS frequency standard so I can give you a pretty accurate measurement. 73 Andy WD4KDN I resolved the question with testing. I had 5 other stations all over the county try the same trick - I.E. transmitting 15kc below the input to the N0KTA repeater. All 5 were able to make the repeater key up easily. That plus the fact that my TM-271A comes standard with a TXCO and the simplex tests I've done has convinced me that it's NOT my rig. I contacted N0KTA but haven't gotten an answer yet. Thanks to all for the advice & help. 73's de Ken KG0WX |
It's good to see that you worked the problem out yourself. I'm amazed that
your signal made it through the cavities of the local repeater. Sound like the owner needs to do some duplexer tuning or get another set. Congratulations on solving your problem. Ken KC4IH "Ken Bessler" wrote in message news:tVSod.2461$3I.1347@okepread01... "nitespark" wrote in message news:ymQod.4883$1t.4522@lakeread07... Ken Bessler wrote: All these tests were done with a known good antenna & new CQ-102 coax. Rig is a 1 year old Kenwood TM-271A. All tests were done at an indicated 68 w which is about normal for hi power from this rig. I'll refrain from using the Pratt repeater until this is fixed. My question is this - have I done enough to assume that the problem is not on my end? Sending in my rig for service monitor testing would be difficult & a genuine pain in the neck. Ken KG0WX The only way to determine your rigs frequency would be to put it on a service monitor or at the least, a frequency counter. I have 3 service monitors and would be glad to check your rig free of charge if you pay postage both ways. My test equipment is calibrated to an HP GPS frequency standard so I can give you a pretty accurate measurement. 73 Andy WD4KDN I resolved the question with testing. I had 5 other stations all over the county try the same trick - I.E. transmitting 15kc below the input to the N0KTA repeater. All 5 were able to make the repeater key up easily. That plus the fact that my TM-271A comes standard with a TXCO and the simplex tests I've done has convinced me that it's NOT my rig. I contacted N0KTA but haven't gotten an answer yet. Thanks to all for the advice & help. 73's de Ken KG0WX |
It's good to see that you worked the problem out yourself. I'm amazed that
your signal made it through the cavities of the local repeater. Sound like the owner needs to do some duplexer tuning or get another set. Congratulations on solving your problem. Ken KC4IH "Ken Bessler" wrote in message news:tVSod.2461$3I.1347@okepread01... "nitespark" wrote in message news:ymQod.4883$1t.4522@lakeread07... Ken Bessler wrote: All these tests were done with a known good antenna & new CQ-102 coax. Rig is a 1 year old Kenwood TM-271A. All tests were done at an indicated 68 w which is about normal for hi power from this rig. I'll refrain from using the Pratt repeater until this is fixed. My question is this - have I done enough to assume that the problem is not on my end? Sending in my rig for service monitor testing would be difficult & a genuine pain in the neck. Ken KG0WX The only way to determine your rigs frequency would be to put it on a service monitor or at the least, a frequency counter. I have 3 service monitors and would be glad to check your rig free of charge if you pay postage both ways. My test equipment is calibrated to an HP GPS frequency standard so I can give you a pretty accurate measurement. 73 Andy WD4KDN I resolved the question with testing. I had 5 other stations all over the county try the same trick - I.E. transmitting 15kc below the input to the N0KTA repeater. All 5 were able to make the repeater key up easily. That plus the fact that my TM-271A comes standard with a TXCO and the simplex tests I've done has convinced me that it's NOT my rig. I contacted N0KTA but haven't gotten an answer yet. Thanks to all for the advice & help. 73's de Ken KG0WX |
"Ken Bessler" wrote in message news:rYHod.1792$3I.1128@okepread01... I live about 15 miles from the N0KTA 146.715 repeater. I like to talk to the 146.700 repeater in Pratt, KS (about 95 miles). Problem is that when I transmit on 146.100 for the Pratt machine, I inadvertantly also key up the 146.715 machine. At first I suspected my transmitter was off freq so I tested 3 other repeaters - 145.370 at 1/2 mile away, 146.895 at 1 mile away and 146.850 at 3 miles away. On all three tests, I could key up those machines as long as I was +/- LESS than 15 khz from the correct input freq. On all 3 when I went to the next channel (15 khz spacing) up or down, I could not key up the machine. Chances are there is nothing wrong with either system. Operating 15 kcs is really too close for repeaters. Many of them are converted comercial rigs and the selectivity is not that good in many cases as they were designed for 30 KC spacings. When the repeater keys up and you are 15 kc away from it , will it break the squelch of your rig ? |
"Ken Bessler" wrote in message news:rYHod.1792$3I.1128@okepread01... I live about 15 miles from the N0KTA 146.715 repeater. I like to talk to the 146.700 repeater in Pratt, KS (about 95 miles). Problem is that when I transmit on 146.100 for the Pratt machine, I inadvertantly also key up the 146.715 machine. At first I suspected my transmitter was off freq so I tested 3 other repeaters - 145.370 at 1/2 mile away, 146.895 at 1 mile away and 146.850 at 3 miles away. On all three tests, I could key up those machines as long as I was +/- LESS than 15 khz from the correct input freq. On all 3 when I went to the next channel (15 khz spacing) up or down, I could not key up the machine. Chances are there is nothing wrong with either system. Operating 15 kcs is really too close for repeaters. Many of them are converted comercial rigs and the selectivity is not that good in many cases as they were designed for 30 KC spacings. When the repeater keys up and you are 15 kc away from it , will it break the squelch of your rig ? |
"Ken Bessler" wrote in message news:rYHod.1792$3I.1128@okepread01... I live about 15 miles from the N0KTA 146.715 repeater. I like to talk to the 146.700 repeater in Pratt, KS (about 95 miles). Problem is that when I transmit on 146.100 for the Pratt machine, I inadvertantly also key up the 146.715 machine. At first I suspected my transmitter was off freq so I tested 3 other repeaters - 145.370 at 1/2 mile away, 146.895 at 1 mile away and 146.850 at 3 miles away. On all three tests, I could key up those machines as long as I was +/- LESS than 15 khz from the correct input freq. On all 3 when I went to the next channel (15 khz spacing) up or down, I could not key up the machine. Chances are there is nothing wrong with either system. Operating 15 kcs is really too close for repeaters. Many of them are converted comercial rigs and the selectivity is not that good in many cases as they were designed for 30 KC spacings. When the repeater keys up and you are 15 kc away from it , will it break the squelch of your rig ? |
Learn how duplexers work before you open your mouth and say something wrong.
They do not have very much selectivity for very near frequencies. That is while they have notches around 80 to 120 db to keep the receiver and transmiters seperated, the first 100 kc or more has only a few db of selectivity. "Photoman" wrote in message ... It's good to see that you worked the problem out yourself. I'm amazed that your signal made it through the cavities of the local repeater. Sound like the owner needs to do some duplexer tuning or get another set. Congratulations on solving your problem. Ken KC4IH "Ken Bessler" wrote in message news:tVSod.2461$3I.1347@okepread01... "nitespark" wrote in message news:ymQod.4883$1t.4522@lakeread07... Ken Bessler wrote: All these tests were done with a known good antenna & new CQ-102 coax. Rig is a 1 year old Kenwood TM-271A. All tests were done at an indicated 68 w which is about normal for hi power from this rig. I'll refrain from using the Pratt repeater until this is fixed. My question is this - have I done enough to assume that the problem is not on my end? Sending in my rig for service monitor testing would be difficult & a genuine pain in the neck. Ken KG0WX The only way to determine your rigs frequency would be to put it on a service monitor or at the least, a frequency counter. I have 3 service monitors and would be glad to check your rig free of charge if you pay postage both ways. My test equipment is calibrated to an HP GPS frequency standard so I can give you a pretty accurate measurement. 73 Andy WD4KDN I resolved the question with testing. I had 5 other stations all over the county try the same trick - I.E. transmitting 15kc below the input to the N0KTA repeater. All 5 were able to make the repeater key up easily. That plus the fact that my TM-271A comes standard with a TXCO and the simplex tests I've done has convinced me that it's NOT my rig. I contacted N0KTA but haven't gotten an answer yet. Thanks to all for the advice & help. 73's de Ken KG0WX |
Learn how duplexers work before you open your mouth and say something wrong.
They do not have very much selectivity for very near frequencies. That is while they have notches around 80 to 120 db to keep the receiver and transmiters seperated, the first 100 kc or more has only a few db of selectivity. "Photoman" wrote in message ... It's good to see that you worked the problem out yourself. I'm amazed that your signal made it through the cavities of the local repeater. Sound like the owner needs to do some duplexer tuning or get another set. Congratulations on solving your problem. Ken KC4IH "Ken Bessler" wrote in message news:tVSod.2461$3I.1347@okepread01... "nitespark" wrote in message news:ymQod.4883$1t.4522@lakeread07... Ken Bessler wrote: All these tests were done with a known good antenna & new CQ-102 coax. Rig is a 1 year old Kenwood TM-271A. All tests were done at an indicated 68 w which is about normal for hi power from this rig. I'll refrain from using the Pratt repeater until this is fixed. My question is this - have I done enough to assume that the problem is not on my end? Sending in my rig for service monitor testing would be difficult & a genuine pain in the neck. Ken KG0WX The only way to determine your rigs frequency would be to put it on a service monitor or at the least, a frequency counter. I have 3 service monitors and would be glad to check your rig free of charge if you pay postage both ways. My test equipment is calibrated to an HP GPS frequency standard so I can give you a pretty accurate measurement. 73 Andy WD4KDN I resolved the question with testing. I had 5 other stations all over the county try the same trick - I.E. transmitting 15kc below the input to the N0KTA repeater. All 5 were able to make the repeater key up easily. That plus the fact that my TM-271A comes standard with a TXCO and the simplex tests I've done has convinced me that it's NOT my rig. I contacted N0KTA but haven't gotten an answer yet. Thanks to all for the advice & help. 73's de Ken KG0WX |
Learn how duplexers work before you open your mouth and say something wrong.
They do not have very much selectivity for very near frequencies. That is while they have notches around 80 to 120 db to keep the receiver and transmiters seperated, the first 100 kc or more has only a few db of selectivity. "Photoman" wrote in message ... It's good to see that you worked the problem out yourself. I'm amazed that your signal made it through the cavities of the local repeater. Sound like the owner needs to do some duplexer tuning or get another set. Congratulations on solving your problem. Ken KC4IH "Ken Bessler" wrote in message news:tVSod.2461$3I.1347@okepread01... "nitespark" wrote in message news:ymQod.4883$1t.4522@lakeread07... Ken Bessler wrote: All these tests were done with a known good antenna & new CQ-102 coax. Rig is a 1 year old Kenwood TM-271A. All tests were done at an indicated 68 w which is about normal for hi power from this rig. I'll refrain from using the Pratt repeater until this is fixed. My question is this - have I done enough to assume that the problem is not on my end? Sending in my rig for service monitor testing would be difficult & a genuine pain in the neck. Ken KG0WX The only way to determine your rigs frequency would be to put it on a service monitor or at the least, a frequency counter. I have 3 service monitors and would be glad to check your rig free of charge if you pay postage both ways. My test equipment is calibrated to an HP GPS frequency standard so I can give you a pretty accurate measurement. 73 Andy WD4KDN I resolved the question with testing. I had 5 other stations all over the county try the same trick - I.E. transmitting 15kc below the input to the N0KTA repeater. All 5 were able to make the repeater key up easily. That plus the fact that my TM-271A comes standard with a TXCO and the simplex tests I've done has convinced me that it's NOT my rig. I contacted N0KTA but haven't gotten an answer yet. Thanks to all for the advice & help. 73's de Ken KG0WX |
"Ralph Mowery" wrote in message k.net... Chances are there is nothing wrong with either system. Operating 15 kcs is really too close for repeaters. Many of them are converted comercial rigs and the selectivity is not that good in many cases as they were designed for 30 KC spacings. When the repeater keys up and you are 15 kc away from it , will it break the squelch of your rig ? No. As a matter of fact, I tried to hear several VERY close repeaters when +/- 15kc of their outputs. I heard none of them. You're telling me a repeater is *supposed* to be *less* selective than a Kenwood TM-271A? P.S. Happy Thanksgiving. 73's es gd trky de Ken KG0WX |
"Ralph Mowery" wrote in message k.net... Chances are there is nothing wrong with either system. Operating 15 kcs is really too close for repeaters. Many of them are converted comercial rigs and the selectivity is not that good in many cases as they were designed for 30 KC spacings. When the repeater keys up and you are 15 kc away from it , will it break the squelch of your rig ? No. As a matter of fact, I tried to hear several VERY close repeaters when +/- 15kc of their outputs. I heard none of them. You're telling me a repeater is *supposed* to be *less* selective than a Kenwood TM-271A? P.S. Happy Thanksgiving. 73's es gd trky de Ken KG0WX |
"Ralph Mowery" wrote in message k.net... Chances are there is nothing wrong with either system. Operating 15 kcs is really too close for repeaters. Many of them are converted comercial rigs and the selectivity is not that good in many cases as they were designed for 30 KC spacings. When the repeater keys up and you are 15 kc away from it , will it break the squelch of your rig ? No. As a matter of fact, I tried to hear several VERY close repeaters when +/- 15kc of their outputs. I heard none of them. You're telling me a repeater is *supposed* to be *less* selective than a Kenwood TM-271A? P.S. Happy Thanksgiving. 73's es gd trky de Ken KG0WX |
In article t,
Ralph Mowery wrote: Chances are there is nothing wrong with either system. Operating 15 kcs is really too close for repeaters. Many of them are converted comercial rigs and the selectivity is not that good in many cases as they were designed for 30 KC spacings. Here in northern California, repeater spacings in the 2-meter band seem to be about evenly divided between 15 kHz and 20 kHz, depending on which portion of the band one is taking about. The local repeater coordination council (NARCC) mandates the use of narrow-selectivity RF and IF stages, and peak transmit deviations not to exceed 4 kHz. The new Kendecom repeaters my group is in the process of putting on the air, have an IF response which falls off of a cliff at 7.5 khz... in fact these rigs are very prone to pop or squelch if somebody's radio is tuned up too hot and is over-deviating past this point. It'd be nice to be able to count on 30 kHz repeater spacing, but in many areas of the country the 2-meter repeater subbands are just too crowded to permit this. -- Dave Platt AE6EO Hosting the Jade Warrior home page: http://www.radagast.org/jade-warrior I do _not_ wish to receive unsolicited commercial email, and I will boycott any company which has the gall to send me such ads! |
In article t,
Ralph Mowery wrote: Chances are there is nothing wrong with either system. Operating 15 kcs is really too close for repeaters. Many of them are converted comercial rigs and the selectivity is not that good in many cases as they were designed for 30 KC spacings. Here in northern California, repeater spacings in the 2-meter band seem to be about evenly divided between 15 kHz and 20 kHz, depending on which portion of the band one is taking about. The local repeater coordination council (NARCC) mandates the use of narrow-selectivity RF and IF stages, and peak transmit deviations not to exceed 4 kHz. The new Kendecom repeaters my group is in the process of putting on the air, have an IF response which falls off of a cliff at 7.5 khz... in fact these rigs are very prone to pop or squelch if somebody's radio is tuned up too hot and is over-deviating past this point. It'd be nice to be able to count on 30 kHz repeater spacing, but in many areas of the country the 2-meter repeater subbands are just too crowded to permit this. -- Dave Platt AE6EO Hosting the Jade Warrior home page: http://www.radagast.org/jade-warrior I do _not_ wish to receive unsolicited commercial email, and I will boycott any company which has the gall to send me such ads! |
In article t,
Ralph Mowery wrote: Chances are there is nothing wrong with either system. Operating 15 kcs is really too close for repeaters. Many of them are converted comercial rigs and the selectivity is not that good in many cases as they were designed for 30 KC spacings. Here in northern California, repeater spacings in the 2-meter band seem to be about evenly divided between 15 kHz and 20 kHz, depending on which portion of the band one is taking about. The local repeater coordination council (NARCC) mandates the use of narrow-selectivity RF and IF stages, and peak transmit deviations not to exceed 4 kHz. The new Kendecom repeaters my group is in the process of putting on the air, have an IF response which falls off of a cliff at 7.5 khz... in fact these rigs are very prone to pop or squelch if somebody's radio is tuned up too hot and is over-deviating past this point. It'd be nice to be able to count on 30 kHz repeater spacing, but in many areas of the country the 2-meter repeater subbands are just too crowded to permit this. -- Dave Platt AE6EO Hosting the Jade Warrior home page: http://www.radagast.org/jade-warrior I do _not_ wish to receive unsolicited commercial email, and I will boycott any company which has the gall to send me such ads! |
No. As a matter of fact, I tried to hear several VERY close repeaters when +/- 15kc of their outputs. I heard none of them. You're telling me a repeater is *supposed* to be *less* selective than a Kenwood TM-271A? I am not saying the repeater is suspost to be less slective, just that many are. Some (maybe alot ) of repeaters are converted from older comercial gear such as the GE Mastr ll series. They probably are not as selective. They met the comercial standards from 20 or so years ago. While there are probably not very many if any of the old VHF Enginering units in use today, they were fine repeaters for the money and for what was out about 25 or so years ago. I still put one on about 2 years ago while I took the other repeater off the air to do some work for a week or so. While your Kenwood may be more selective than the repeater , try keying the thing for an hour or two in a shack that is about 100 deg F . The repeater has to be built to a differant enviroment than the rigs at home operate in. It might also have a 20 db preamp on it and the deviation may be lower. I am not defending the repeater over your rig, just mentioning some things that the repeater owners have to compete with. Also look at the overall cost of the repeater, including the antenna and controler and duplexer. By the time some of the other items have been bought it may leave little money for the actual receiver and transmitter. |
No. As a matter of fact, I tried to hear several VERY close repeaters when +/- 15kc of their outputs. I heard none of them. You're telling me a repeater is *supposed* to be *less* selective than a Kenwood TM-271A? I am not saying the repeater is suspost to be less slective, just that many are. Some (maybe alot ) of repeaters are converted from older comercial gear such as the GE Mastr ll series. They probably are not as selective. They met the comercial standards from 20 or so years ago. While there are probably not very many if any of the old VHF Enginering units in use today, they were fine repeaters for the money and for what was out about 25 or so years ago. I still put one on about 2 years ago while I took the other repeater off the air to do some work for a week or so. While your Kenwood may be more selective than the repeater , try keying the thing for an hour or two in a shack that is about 100 deg F . The repeater has to be built to a differant enviroment than the rigs at home operate in. It might also have a 20 db preamp on it and the deviation may be lower. I am not defending the repeater over your rig, just mentioning some things that the repeater owners have to compete with. Also look at the overall cost of the repeater, including the antenna and controler and duplexer. By the time some of the other items have been bought it may leave little money for the actual receiver and transmitter. |
No. As a matter of fact, I tried to hear several VERY close repeaters when +/- 15kc of their outputs. I heard none of them. You're telling me a repeater is *supposed* to be *less* selective than a Kenwood TM-271A? I am not saying the repeater is suspost to be less slective, just that many are. Some (maybe alot ) of repeaters are converted from older comercial gear such as the GE Mastr ll series. They probably are not as selective. They met the comercial standards from 20 or so years ago. While there are probably not very many if any of the old VHF Enginering units in use today, they were fine repeaters for the money and for what was out about 25 or so years ago. I still put one on about 2 years ago while I took the other repeater off the air to do some work for a week or so. While your Kenwood may be more selective than the repeater , try keying the thing for an hour or two in a shack that is about 100 deg F . The repeater has to be built to a differant enviroment than the rigs at home operate in. It might also have a 20 db preamp on it and the deviation may be lower. I am not defending the repeater over your rig, just mentioning some things that the repeater owners have to compete with. Also look at the overall cost of the repeater, including the antenna and controler and duplexer. By the time some of the other items have been bought it may leave little money for the actual receiver and transmitter. |
Here in northern California, repeater spacings in the 2-meter band seem to be about evenly divided between 15 kHz and 20 kHz, depending on which portion of the band one is taking about. The local repeater coordination council (NARCC) mandates the use of narrow-selectivity RF and IF stages, and peak transmit deviations not to exceed 4 kHz. The new Kendecom repeaters my group is in the process of putting on the air, have an IF response which falls off of a cliff at 7.5 khz... in fact these rigs are very prone to pop or squelch if somebody's radio is tuned up too hot and is over-deviating past this point. That's nice that your group can put the Kendecom repeaters on the air. In some areas there is not that much money for the whole system let alone just for the repeater. |
Here in northern California, repeater spacings in the 2-meter band seem to be about evenly divided between 15 kHz and 20 kHz, depending on which portion of the band one is taking about. The local repeater coordination council (NARCC) mandates the use of narrow-selectivity RF and IF stages, and peak transmit deviations not to exceed 4 kHz. The new Kendecom repeaters my group is in the process of putting on the air, have an IF response which falls off of a cliff at 7.5 khz... in fact these rigs are very prone to pop or squelch if somebody's radio is tuned up too hot and is over-deviating past this point. That's nice that your group can put the Kendecom repeaters on the air. In some areas there is not that much money for the whole system let alone just for the repeater. |
Here in northern California, repeater spacings in the 2-meter band seem to be about evenly divided between 15 kHz and 20 kHz, depending on which portion of the band one is taking about. The local repeater coordination council (NARCC) mandates the use of narrow-selectivity RF and IF stages, and peak transmit deviations not to exceed 4 kHz. The new Kendecom repeaters my group is in the process of putting on the air, have an IF response which falls off of a cliff at 7.5 khz... in fact these rigs are very prone to pop or squelch if somebody's radio is tuned up too hot and is over-deviating past this point. That's nice that your group can put the Kendecom repeaters on the air. In some areas there is not that much money for the whole system let alone just for the repeater. |
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