[Elecraft] Gentlemen, we have SSB! ( I think )

[Don Wilhelm]

Jerry,

Yes, there is a bit of compromise between LSB and USB on the carrier 
null, but it should not be much.  Settle for a compromise position.

73,
Don W3FPR

On 6/30/2021 10:06 PM, jerry wrote:
> So I got up at 5:30 this morning and continued stuffing the SSB 
> adapter card. Finished it up this afternoon.
>
> Trying it out, the CPU came up... CW still worked... But no SSB 
> transmit, and the SSB receive was very very soft.  Had to turn the AF 
> gain up all the way to hear
> anything at all.
>
> My untutored diagnosis - something was wrong with that 7-crystal SSB 
> filter.
>
> So I pulled the card out, scrubbed it again with IPA, stuck it under 
> the microscope to look - again - for solder splashes and cold joints.  
> Scraped off a little something here & there. Also, I had doubts about 
> the connections to the input & output transformers.  So I hit those 
> again with the soldering iron.
>
> Put the card back in the K2 - and ...Wow!  Lively SSB receive!  RF out 
> on transmit!
>
>   Still need to align the rig.  Piping the output into another ham rig 
> through a big attenuator - it sounds pretty good.  One niggle - 
> carrier suppression.  If it's nulled out for LSB, it's not for USB.  
> The nulls are in different places on the pot.  I guess you set a 
> compromise position, and make sure the carrier is off the skirts of 
> the filter, so that can help.
>
>                     - Jerry KF6VB