"AD5GB" wrote in message
...
Greetings,

I wonder if someone can help point me in the right direction with a set
of 'twins' I'm trying to get working right. I finally have the receiver
sensitivity back and I've been through the complete alignment procedure
in the service manual. The problem that remains is that the receiver is
about 600 - 700Hz below the transmitter in LSB mode. Other modes seem
to line up ok. Also, in LSB the 'sound' seems a little weaker than on
USB, yet the apparent signal strength (S-meter reading) doesn't seem to
change.

I'm quite a newbie to RF electronics and have gotten quite an education
with it thus far. I'm sure there's some silly little thing I'm
overlooking, but I'm stuck. I'd be most grateful for any tips or
suggestions.

Thanks much and Happy Holidays!

--
Randall D. DuCharme (Radio AD5GB)

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Your problem is the LSB crystal in one or both the Rx and the Tx have
changed.

Also the crystal filters have changed.

In most cases they crystals will drift downward in frequency with age.

You need to have extensive test equipment,,,or you can wing it.

Try adjusting the tx LSB xtal only to match with the receiver. Play around
between them both.

Have fun.

Dan/W4NTI