Sounds like the oscillator for 20m isn't,
Oscillating that is.
Looking at the diagram it seems Y2, 18MHz is used for 20m, but also 80m,
similarly the output filter from the oscillator board for 20m is also used
on 17m.
Other options would be the input filters or the low pass filters. Might be
something not being switched when on 20m.
Check all connections first for poor contact.
Martin, HS0ZED
-----Original Message-----
From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of Bob Towers
Sent: Saturday, December 29, 2012 02:05
To: tentec@contesting.com
Subject: [TenTec] Omni V.9 dead on 20m RX and TX
I thought I'd revisit my old Omni V.9 - Christmas season, and all that - and
have a look at interfacing a SDR in the 9Mhz IF circuit. It turned out to be
a remarkably easy project using my Flex 1500, so I'm planning to put an IF
output on the back of the rig and building a Softrock to do the job.
However, I noticed that 20m RX sensitivity was way down and I could barely
hear the strongest SSB signals. TX didn't work, either. All other bands from
160 to 10m worked fine on RX and TX.
Any help in solving this one would be much appreciated.
73 and seasons greetings,
Bob Towers
MM0RKT
Hamilton
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