Bill,
First try removing the KSB2 - put bent wire jumpers between pins 1 and 3
of J9 and J10. Then see if you get a good response in CW.
Oh BTW, make sure the CW filters are centered at your sidetone pitch
first - use an audio spectrum analyzer and if you have one, a broadband
noise generator (if not, use band noise, but make sure there are on
signals on the band segement used).
If the CW filters work OK with the KSB2 removed, the troubleshooting
should start with the switching diodes on the KSB2 option.
73,
Don W3FPR
On 6/11/2019 2:53 PM, Bill Coleman wrote:
OK, I have a K2/100 w/ KAT100 that may have recently suffered from a static
discharge event. I had to replace D16 & D17 in the KPA100, and I’m likely to do
the same to the SWR bridge diodes in the KAT100 (since I can’t get the bridge to
null properly).
The other thing I noticed is that the receiver sensitivity is substantially
lower when using the CW filter. Using OP1, it seems to receive normally. I have
three filters for CW 1.0, 0.4 and 0.16. When switching to 1.0 from OP1, signal
levels drop by about 2-3 bars on the S-meter.
Anything in particular I should troubleshoot?
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