[Kenwood] TS-940S 3of10 bands virtually dead

Fri Nov 19 20:26:32 EST 2004

Yup, Been there, seen that...
 Check the band switching diodes that switch in the band pass filters
in the front end. They usually get zapped due to static, lightning or
RF from another rig getting into the front end. You probably wiped out
two bands worth of them. 7MHz and 14/18 MHz if I remember are two
different sets.
Mike, W1NR
-----Original Message-----
From: kenwood-bounces at mailman.qth.net
[mailto:kenwood-bounces at mailman.qth.net]On Behalf Of Tom Terjeson
Sent: Friday, November 19, 2004 7:59 PM
To: kenwood at mailman.qth.net
Subject: [Kenwood] TS-940S 3of10 bands virtually dead
Hi All,
My TS-940S is barely receiving on 7,17,20.
Down 25-30db in a side-by-side comparison.
Attached a TS-830S onto TS-940S antenna
lead for equivalent receive-only side-by-side
test. Bands 160,80,30,15,12,10 had equal
receive of signals and strength. The 7,17,20
meter bands of the 940 are virtually dead.
e.g. on these three bands, if we found a
signal on 830 that was 25-30 over S9 then
it was just barely audible on the 940. Any
signals less than 30over on the 830 were
not heard at all on the 940 for these three
bands only.
Has anyone heard of such a set of symptoms?
7,17,20 almost dead and all three have an
equal level of reduction in signal levels,
approx. down 28-30db. Could a single problem
affect this collection of 3 bands? Is this a known
problem with a known fix, or is it time to send it
in for repair?
Any ideas?
Please respond to viking67 at comcast.net
Thanks in advance,
very curious
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