[Elecraft] K2 Audio Level using filters

[Don Wilhelm]

Earl,

It does sound like you have a problem with the filter switching diode 
matrix on the KSB2 board.  If your signal level is decreased from the 
level obtained when the KSB2 is bypassed ( jumper between pins 1 and 3 
of both J9 and J10). then you have a problem with the KSB2 board.  Make 
certainly all the diodes are correctly oriented, and re-flow the 
soldering in the OP1 filter end of the board.

If you are relying on the BFO frequency settings listed in the KSB2 
manual, be advised that there "is a better way" -- go to my webpage 
www.w3fpr.com article on K2 Dial Calibration and go to "page 3" which 
deals with the filter settings.  Use Spectrogram to give you a visual 
indication of the filter placement.  Note that recent K2s will have wide 
filter widths that are much wider than indicated i\on the K2 display  -- 
use Spectrogram to indicate the actual filter width.

Spectrogram version 5.17 and Spectrogram version 16 may be downloaded 
from my website,  Both have been seving my needs for a long time and 
should be free of problems (there have been reports of bad downloads of 
version 16).

73,
Don W3FPR



On 4/16/2012 10:28 PM, Earl Richardet wrote:
> Hello to the Reflector,
>
>
>
> I've recently completed building my Elecraft K2 transceiver and I have one
> problem that I would like to resolve.  Up to the point where I installed the
> SSB kit into the radio, the audio level on each of the filter selections was
> strong and working fine.  After I installed the SSB kit, the audio level on
> the CQ filters dropped off significantly.  The OP1 SSB filters are working
> great and have strong audio output, but as soon as I select FL3 or FL4 the
> audio drops way off.  Otherwise the SSB board is working fine and I great
> audio reports from other stations on my transmit audio.
>
>
>
> At this point I have confirmed all the components on the SSB, no bridges or
> splatter that I can see.  Everything appears to be ok.   Don't know where to
> start troubleshooting this issue.
>
>
>
> Appreciate any suggestions on troubleshooting or if anyone has experienced
> this themselves and of course what you did  to resolve.
>
>
>
> Thanks and Regards,
>
>
>
> Earl VE7QJ
>
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