After reading David's post (see below) and Joe, N5KAT's response, I
called Ten-Tec and spoke to Paul Clinton, the Service Manager, and asked
him if he knew of the mod to lower the audio gain. He went to his
"Modifications Book" and said that I should put a 3.3K 1/4w resistor
from the junction of R79 and C51on the IF/AF Board to ground. This
junction goes to the cable connector socket 57 on the board.
After looking at it, I tack soldered one end of the 3.3K to resistor R79
( the end closest to the connector pins of 57) and the other end to the
board foil - which is ground. Simple to do, and I didn't have to remove
the board - did it all from the top.
The results ? - OUTSTANDING ! Now the perfect listening position of the
volume control with my headphones, or the speaker, is at 11 or 12
o'clock instead of 8 or 9.
I had previously put in the W3TS mod and had played with the value of
the resistor in the notch circuit that Joe, N5KAT referred to, but the
volume was still too touchy. Paul's mod sure did the trick. Thank you
Mr. Clinton !
I have also re-capped all the electrolytic capacitors on the IF/AF
Board, Logic Board, and the VF Display Driver Board. WHAT A DIFFERENCE
!! It is unbelievable to me how quiet the receiver is now - signals
just POP out of the quiet ! Sure recommend it to anyone with an OMNI V.
Thanks again to Joe, N5KAT for all his help and encouragement.
73, Donald K6RV
http://lists.contesting.com/archives//html/TenTec/2008-02/msg00155.html
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