[Elecraft] K2 Poor sensitivity

[Don Wilhelm]

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.
>
>