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