Paul,
If the sensitivity was OK before adding the KSB2 option, then the KSB2
is the most likely cause.
Remove the KSB2 and put a bent wire jumper between pins 1 and 3 of both
J9 and J10 and see if the sensitivity improves.
If so, re-flow the soldering on the KSB2 board, check the diode
orientation and check the leads of T1 and T2 to be sure they were well
stripped and tinned.
If you need to optimize the filter alignment, take a look at the K2 Dial
Calibration article on my website www.w3fpr.com - part 3 of that article
covers filter alignment.
If it turns out that there is something else wrong, you will have to do
Receive Signal Tracing to isolate it to the failing stage. See Appendix
A in the manual. It takes a strong signal input to do the checks with
an RF Probe. If your HP signal generator is not strong enough to
provide the specified input signal level, build the signal generator
shown in the manual.
73,
Don W3FPR
On 9/27/2016 6:38 AM, Radiobeamer wrote:
Hi group,
I bought a used K2 some time ago. I've not used it much but it seemed to
work fine. I recently upgraded it with the SSB option and the
60m/transverter option. I had to go through the BFO re-alignment procedure
in order to make the filters work properly after installing the SSB option,
and this process seemed to work quite well. The added options appear to be
working OK and I was able to make a few CW and SSB QSOs.
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