[Kenwood] YK-88C Attenuation

[KD5NWA]

I have a TS-820 and when you put it in CW the audio goes way down compared 
to SSB and the S-Meter reading also goes down several S-Units even if you 
use a signal generator as your signal source. I have tried re tuning, 
playing with the bandpass and it never improves, Is there a jumper in the 
TS-820 to set the gain to compensate for the loss of the CW filter?

Thanks

At 10:05 PM 2/21/2003, Alan Wormser wrote:
>Problem solved!  Thanks to all who responded.
>
>After quickly checking the 6 solder points of theYK-88C filter, and that the
>jumper was set to CW4, I did the first steps in aligning the receiver - per
>the TS-830 user's manual.  The only slugs that seemed to make a difference in
>volume of the sound coming out the speaker were T2 (RF Board), and L3, L6,
>and L7 (IF Board).  The others (L2, L4, L5, and L11 on the IF Board) didn't
>seem to have any  affect -- at least using the crude methods of tuning by ear
>for max noise (AGC off) or by using the 25 kHz XTAL marker & watching the
>S-Meeter with AGC turned to "fast."
>
>Note that although L12 is mentioned in the Users Manual alignment procedure.
>it is NOT mentioned in the procedure shown in the Severice Manual, nor does
>it appear on any diagrams from either manual.
>
>So I peaked T2, L3, L6, and L7 and left the others where there were.  There
>may have been some improvement in audio, but it is very slight.  Because of
>the next discovery, I didn't finish the realignment.
>
>I then looked more closely at the underside of the IF board, where the YK-88C
>filter is soldered.  Using a magnifying glass, I finally saw that the
>problem:  A trace/pad had lifted off the printed circuit board, and slid
>sideways close enough to short out the two pins at one end of the filter.
>So, I reheated the solder and used the tuning tool to shove the pad back into
>position, separating the two pins.
>
>When I tried the TS-830, my attenuation problem was gone.  Now insertion loss
>is less than 1 or 2 dB -- less than 1/2 S-unit according to the S-meter.
>
>Alan N5LF
>- - -
>
>Your moderator for this list is:
>Larry Wilson KE1HZ kenwood-owner@mailman.qth.net
>
>_______________________________________________
>Kenwood mailing list
>Kenwood@mailman.qth.net
>http://mailman.qth.net/mailman/listinfo/kenwood

Cecil
KD5NWA