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In article ,
"Michael" wrote: "Telamon" wrote in message ... In article , "Michael" wrote: "Telamon" wrote in message ... In article , Tony Meloche wrote: dxAceŠ wrote: Michael wrote: "starman" wrote in message ... Michael wrote: "starman" wrote in message Can you give us some examples of the weak signal stations you receive on the R-75 with ECSS? What kind of antenna do you use for these DX stations? Thanks DX'ing weak signals have just as much to do with "conditions" as they do with the power and distance of the transmitted signal. It may be very easy to get say...RNZI from my location during times of the day and year when conditions are good for it, and impossible to pick it up during other times. I've used ECSS to identify weak carriers too but I was wondering what you would consider a good DX catch. What have you heard lately that you would classify as weak DX, given all the "conditions" Half of what I listen to is dx, including hams from around the world. If you need a single example, I'll say .. How about right now.... 21:50 UTC on 7.190 .... I'm listening to what I think is Tunisia. Currently Arabic music. The signal is barely s-3 and it is quite noisy. The same exact signal is also being broadcast on 7225. Still a bit noisy with fade out, but it makes it all the way up to s-7. I'd call this DX, but not a VERY weak one. It is far away, and it is messy. The drill here on this signal is to use all the tools at my disposal to clean it up and see how good I can get it to sound... IE: ecss, filters, gain, nb, nr... etc..... About S8 here on both frequencies. Steve Holland, MI Drake R7, R8 and R8B To be fair, though, Steve - that probably has as much or more to do with your antenna farm (I've seen the pics and read your description - it's terrific) as it does your reciever. Steve does have good antennas but the Drake R8B is very sensitive. One thing about different manufactures is their attitude toward specifications. Some rate their product more conservatively than others. Just something to keep in mind perusing the specifications between different manufactures of radio equipment. I don't think the difference between him picking it up on 7225 as s-8 and me picking it up as s-7 is enough of a difference to base it on his receiver being more sensitive. It is hardly any difference at all. If I checked the meter ten seconds later, mine might have been at s-6 or s-9 the way it was coming in and out. The Drake R8B and Icom R-75 have about the same sensitivity so I don't think that is the difference. One real question here... And one that I'm interested in.... Why would I get it on 7190 at only s-3 while he gets it as s-8 ??? We're both getting it about the same strength on 7225, so why should we be getting such a measurable difference on 7190 ??? I'd say it probably has more to do with the peculiarity of our locations in respect to the transmitter and what ever comes between them rather then our receivers. The signal in question is from the other side of the world compared to the difference in distance between the two of you is small so location is not likely the answer. Lots of other possibilities here. The sensitivity numbers for the receivers are general numbers. The actual sensitivity changes with frequency because the front end of the radio is not completely flat. Could be your R-75 has a bigger reflection at 7190 but this is not the likely reason either. Most likely the antenna itself or whatever you have for matching it to the coax is the reason. Your antenna system most likely has a poorer response at 7190 compared to Steve's system. I tried both my dipole and my 200 ft roof wire on both signals and both of my antennas received the signal on 7190 substantially weaker then that on 7225. I bet if you set Steve's antenna and receiver up here at that time, you'd get the same difference in the two signals. I don't think it is the antenna or the receiver. Something else is going on. I know both Steve and I are in North America, but, we are far enough away (NJ vs. MI) to have our locations effect how we receive the signal. For all I know, the 7190 signal comes out of a different antenna set up that just happens to be favorable to Steve's direction. I think that is where the real study is here. To find out what difference if any that there is between the two signals. Are they coming from two different antennas ??? Michael, you and Steve are not far enough apart for another hop through the ionosphere so you are about the same reception distance from the source. It most likely has something to do with an adverse reactance in your antenna / matching unit / coax to your radio. -- Telamon Ventura, California |
"Telamon" wrote in message ... In article , "Michael" wrote: "Telamon" wrote in message ... In article , "Michael" wrote: "Telamon" wrote in message ... In article , Tony Meloche wrote: dxAceŠ wrote: Michael wrote: "starman" wrote in message ... Michael wrote: "starman" wrote in message Can you give us some examples of the weak signal stations you receive on the R-75 with ECSS? What kind of antenna do you use for these DX stations? Thanks DX'ing weak signals have just as much to do with "conditions" as they do with the power and distance of the transmitted signal. It may be very easy to get say...RNZI from my location during times of the day and year when conditions are good for it, and impossible to pick it up during other times. I've used ECSS to identify weak carriers too but I was wondering what you would consider a good DX catch. What have you heard lately that you would classify as weak DX, given all the "conditions" Half of what I listen to is dx, including hams from around the world. If you need a single example, I'll say .. How about right now.... 21:50 UTC on 7.190 .... I'm listening to what I think is Tunisia. Currently Arabic music. The signal is barely s-3 and it is quite noisy. The same exact signal is also being broadcast on 7225. Still a bit noisy with fade out, but it makes it all the way up to s-7. I'd call this DX, but not a VERY weak one. It is far away, and it is messy. The drill here on this signal is to use all the tools at my disposal to clean it up and see how good I can get it to sound... IE: ecss, filters, gain, nb, nr... etc..... About S8 here on both frequencies. Steve Holland, MI Drake R7, R8 and R8B To be fair, though, Steve - that probably has as much or more to do with your antenna farm (I've seen the pics and read your description - it's terrific) as it does your reciever. Steve does have good antennas but the Drake R8B is very sensitive. One thing about different manufactures is their attitude toward specifications. Some rate their product more conservatively than others. Just something to keep in mind perusing the specifications between different manufactures of radio equipment. I don't think the difference between him picking it up on 7225 as s-8 and me picking it up as s-7 is enough of a difference to base it on his receiver being more sensitive. It is hardly any difference at all. If I checked the meter ten seconds later, mine might have been at s-6 or s-9 the way it was coming in and out. The Drake R8B and Icom R-75 have about the same sensitivity so I don't think that is the difference. One real question here... And one that I'm interested in.... Why would I get it on 7190 at only s-3 while he gets it as s-8 ??? We're both getting it about the same strength on 7225, so why should we be getting such a measurable difference on 7190 ??? I'd say it probably has more to do with the peculiarity of our locations in respect to the transmitter and what ever comes between them rather then our receivers. The signal in question is from the other side of the world compared to the difference in distance between the two of you is small so location is not likely the answer. Lots of other possibilities here. The sensitivity numbers for the receivers are general numbers. The actual sensitivity changes with frequency because the front end of the radio is not completely flat. Could be your R-75 has a bigger reflection at 7190 but this is not the likely reason either. Most likely the antenna itself or whatever you have for matching it to the coax is the reason. Your antenna system most likely has a poorer response at 7190 compared to Steve's system. I tried both my dipole and my 200 ft roof wire on both signals and both of my antennas received the signal on 7190 substantially weaker then that on 7225. I bet if you set Steve's antenna and receiver up here at that time, you'd get the same difference in the two signals. I don't think it is the antenna or the receiver. Something else is going on. I know both Steve and I are in North America, but, we are far enough away (NJ vs. MI) to have our locations effect how we receive the signal. For all I know, the 7190 signal comes out of a different antenna set up that just happens to be favorable to Steve's direction. I think that is where the real study is here. To find out what difference if any that there is between the two signals. Are they coming from two different antennas ??? Michael, you and Steve are not far enough apart for another hop through the ionosphere so you are about the same reception distance from the source. It most likely has something to do with an adverse reactance in your antenna / matching unit / coax to your radio. The same reactance with two totally different antennas each with its own matching unit and coax ??? I'll try my portables on it tomorrow. That will rule out the antennas. An example of how less then a thousand miles can make a big difference.... When WBCQ on 7415 went "long" on occasion, I could barely hear it in NJ, while it was being heard well in the southern states (further from the transmitter). It is not just a matter of a "hop" in a lot of cases. Michael |
Michael wrote: [SNIP] It most likely has something to do with an adverse reactance in your antenna / matching unit / coax to your radio. The same reactance with two totally different antennas each with its own matching unit and coax ??? What kind of matching unit are you using on your dipole? What frequency is your dipole cut for? Steve Holland, MI Drake R7, R8 and R8B http://www.iserv.net/~n8kdv/dxpage.htm |
In article ,
"Michael" wrote: "Telamon" wrote in message ... In article , "Michael" wrote: "Telamon" wrote in message t... In article , "Michael" wrote: "Telamon" wrote in message ... In article , Tony Meloche wrote: dxAceŠ wrote: Michael wrote: "starman" wrote in message ... Michael wrote: "starman" wrote in message Can you give us some examples of the weak signal stations you receive on the R-75 with ECSS? What kind of antenna do you use for these DX stations? Thanks DX'ing weak signals have just as much to do with "conditions" as they do with the power and distance of the transmitted signal. It may be very easy to get say...RNZI from my location during times of the day and year when conditions are good for it, and impossible to pick it up during other times. I've used ECSS to identify weak carriers too but I was wondering what you would consider a good DX catch. What have you heard lately that you would classify as weak DX, given all the "conditions" Half of what I listen to is dx, including hams from around the world. If you need a single example, I'll say .. How about right now.... 21:50 UTC on 7.190 .... I'm listening to what I think is Tunisia. Currently Arabic music. The signal is barely s-3 and it is quite noisy. The same exact signal is also being broadcast on 7225. Still a bit noisy with fade out, but it makes it all the way up to s-7. I'd call this DX, but not a VERY weak one. It is far away, and it is messy. The drill here on this signal is to use all the tools at my disposal to clean it up and see how good I can get it to sound... IE: ecss, filters, gain, nb, nr... etc..... About S8 here on both frequencies. Steve Holland, MI Drake R7, R8 and R8B To be fair, though, Steve - that probably has as much or more to do with your antenna farm (I've seen the pics and read your description - it's terrific) as it does your reciever. Steve does have good antennas but the Drake R8B is very sensitive. One thing about different manufactures is their attitude toward specifications. Some rate their product more conservatively than others. Just something to keep in mind perusing the specifications between different manufactures of radio equipment. I don't think the difference between him picking it up on 7225 as s-8 and me picking it up as s-7 is enough of a difference to base it on his receiver being more sensitive. It is hardly any difference at all. If I checked the meter ten seconds later, mine might have been at s-6 or s-9 the way it was coming in and out. The Drake R8B and Icom R-75 have about the same sensitivity so I don't think that is the difference. One real question here... And one that I'm interested in.... Why would I get it on 7190 at only s-3 while he gets it as s-8 ??? We're both getting it about the same strength on 7225, so why should we be getting such a measurable difference on 7190 ??? I'd say it probably has more to do with the peculiarity of our locations in respect to the transmitter and whatever comes between them rather then our receivers. The signal in question is from the other side of the world compared to the difference in distance between the two of you is small so location is not likely the answer. Lots of other possibilities here. The sensitivity numbers for the receivers are general numbers. The actual sensitivity changes with frequency because the front end of the radio is not completely flat. Could be your R-75 has a bigger reflection at 7190 but this is not the likely reason either. Most likely the antenna itself or whatever you have for matching it to the coax is the reason. Your antenna system most likely has a poorer response at 7190 compared to Steve's system. I tried both my dipole and my 200 ft roof wire on both signals and both of my antennas received the signal on 7190 substantially weaker then that on 7225. I bet if you set Steve's antenna and receiver up here at that time, you'd get the same difference in the two signals. I don't think it is the antenna or the receiver. Something else is going on. I know both Steve and I are in North America, but, we are far enough away (NJ vs. MI) to have our locations effect how we receive the signal. For all I know, the 7190 signal comes out of a different antenna set up that just happens to be favorable to Steve's direction. I think that is where the real study is here. To find out what difference if any that there is between the two signals. Are they coming from two different antennas ??? Michael, you and Steve are not far enough apart for another hop through the ionosphere so you are about the same reception distance from the source. It most likely has something to do with an adverse reactance in your antenna / matching unit / coax to your radio. The same reactance with two totally different antennas each with its own matching unit and coax ??? If they are similar yes. I'll try my portables on it tomorrow. That will rule out the antennas. An example of how less then a thousand miles can make a big difference.... When WBCQ on 7415 went "long" on occasion, I could barely hear it in NJ, while it was being heard well in the southern states (further from the transmitter). It is not just a matter of a "hop" in a lot of cases. WBCQ is a different situation. You are not far from WBCQ (less than one hop) as opposed to several from the other side of the planet where beam heading is less important. -- Telamon Ventura, California |
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MWB,
"There is some kind of poetic satisfaction in watching that interchange!" MWB - Somehow I thought that you would be Amused :o) All I Asked was a 'simple' straight forward Question of DX Ace [N8KDV]: "What would you say was the 'Best Value for the Money' ?" Focused a matter of personal Judgement: 'Best Value for the Money'. With two Mutually Exclusive Options as Answers: [ ] The "Drake R8B" is the 'Best Value for the Money'. [ ] The "Icom IC-R75" with Kiwa Mods is the 'Best Value for the Money'. TBL: To "Summarize" and put it 'all' in One Sentence: The _______________ is the 'Best Value for the Money'. One Wonders... and Inquiring Minds Want To Know ~ RHF .. .. = = = ocom (Michael Bryant) wrote in message = = = ... From: =?iso-8859-1?Q?dxAce=A9?= But the Question was: "What would you say was the 'Best Value for the Money' ?" [ ] Drake R8B [ ] Icom IC-R75 (R-75) with Kiwa Mods. How many times are you going to ask me the same question? Do you think I'll answer any differently? There is some kind of poetic satisfaction in watching that interchange! LOL! Michael Bryant, WA4009SWL Louisville, KY R75, S800, RX320, SW77, ICF2010K, DX398, 7600G, 6800W, RF2200, 7600A GE SRll, Pro-2006, Pro-2010, Pro-76 (remove "nojunk" to reply) .. |
Signal on both 7190 and 7225 running about S6 at 2115.
Steve Holland, MI Drake R7, R8 and R8B http://www.iserv.net/~n8kdv/dxpage.htm |
"dxAceŠ" wrote in message ... Michael wrote: [SNIP] It most likely has something to do with an adverse reactance in your antenna / matching unit / coax to your radio. The same reactance with two totally different antennas each with its own matching unit and coax ??? What kind of matching unit are you using on your dipole? What frequency is your dipole cut for? Steve Holland, MI Drake R7, R8 and R8B http://www.iserv.net/~n8kdv/dxpage.htm Check out the antennas section on my web page in my signature for antenna info. -- Respectfully, Michael Location: New Jersey Primary Receiver: R-75 with full Kiwa mods Antennas: G5RV, 200ft "Frankenstein" roof wire Additional Radios: KA-1101,KA-1102,PL-550, KA-989, Info-Mate 837, GE-SR III Westinghouse H-104 (seven tube) Web Site: http://md_dxing.tripod.com |
Michael wrote: "dxAceŠ" wrote in message ... Michael wrote: [SNIP] It most likely has something to do with an adverse reactance in your antenna / matching unit / coax to your radio. The same reactance with two totally different antennas each with its own matching unit and coax ??? What kind of matching unit are you using on your dipole? What frequency is your dipole cut for? Steve Holland, MI Drake R7, R8 and R8B http://www.iserv.net/~n8kdv/dxpage.htm Check out the antennas section on my web page in my signature for antenna info. I prefer a band specific dipole, or just a wire here. Currently using 70' N-S, and 200' W-E wires into 9:1 matching transformers. The feed points for the coax are at least 50' behind the shack. Works for me. Steve Holland, MI Drake R7, R8 and R8B http://www.iserv.net/~n8kdv/dxpage.htm |
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