"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

"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 ?

"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

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.

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!

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.