I have been playing catch up with my K2 (#436) and recently installed
the A - B mods as well as adding the KAF2 AND KNB2 options. All was
well until I added the KNB2 option. When I added the KNB2 option, I
noticed that my output levels had dropped. I then discovered that I
had forgot to change the resistors on the RF board.
Once that was done, I had improved audio, but the S-meter is reading
low. With the KNB2 installed and the pre-amp on, I get about an S3
when I am tuned to the XG1 generator signal set to 50 microvolts. If
I bypass the KNB2 by shorting pins 1 to 6 on J12, I get the full S9
reading.
I have pulled C8 to isolate the bandpass filter and my S-meter
readings remain at S3. Is this normal or might I have a problem with
the bandpass filter.
Thanks in advance for your help.
73, Bob Scott W4ZY
Woodbridge, VA
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