[Kenwood] TS-940, strange tuning problem, source discovered

Sat, 1 Mar 2003 09:07:54 +0700

I have uncovered what has been causing the strange tuning behaviour on
my TS-940, the logging program.

I have the IF10B and IF232C connected to my laptop and I have for some
time been running the DX Lab software suite. I really like this
collection of programs which does just about all I need, it's also free
which is a big plus point. It does seem however that the commander
software which controls the radio has a problem with the 940. I can
almost remove the apparently erratic tuning by setting the update
interval to an unfeasably large time but that really defeats the
usefulnessin my book.

Anyway, it's not the radio, which is a relief.

I will have to try some other software to see what that does.

Martin
HS0ZED

-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Martin Sole
Sent: 28 February 2003 22:21
To: 'Kenwood@qth'
Subject: [Kenwood] TS-940, strange tuning problem

I have recently noticed that my 940 has developed an odd tuning problem.
It's only really evident when tuning across a carrier, like the
calibrator signal, or if I mark a point on the vfo knob and count turns
up and down in frequency. The manual says 10KHz per turn but mine seems
to vary. Turn the dial very slowly and it does do 10KHz per turn. Turn
it a little faster and it becomes approximately 15 or 18 KHz per turn
and I get different values for increasing or decreasing the frequency.
Tuning across a carrier sounds rough and lumpy as if it's tuning
sometimes in 10Hz ateps and sometimes in something else.

I have been through the book and looked at the encoder outputs with a
scope but they look fine.

Anybody have any ideas as to what might cause this?

Martin, HS0ZED

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