[Elecraft] K2 "Nearly" Dead following SSB module installation

[Don Wilhelm]

Steve,

One of the common causes of your condition is one of the tiny toroid RF 
chokes shorting ot the crystal cases.  Slide a piece of paper alongside 
the crystal case to serve as an insulator - if that corrects the 
condition, rewound the toroids with new wire and be careful to avoid 
scraping the enamel while winding (do not pull the wire through the 
center, form it around the core on the outside and feed (push) the wire 
through the center, when the turn is complete, snug it up with a gentle 
tug).

If you find nothing wrong with the RFCs, check the soldering on the end 
of the board with the crystals, be certain the headers are well soldered 
to the RF Board, and check that the diodes are properly located and the 
cathode ends are pointing upward on all diodes.

73,
Don W3FPR

Steve Watkins wrote:
> K2 was working wonderfully on CW, and decided to finally install the SSB module I'd completed months ago.
> 
> Picked up on the steps where I left off by removing two jumpers, W2 and W3, and resistor 167 (Page 13 of the KSB2 book).  The board plugged in snuggly, and the K2 powered up with the Elecraft name on the display.
> 
> However, the speaker is now absolutely deaf.  With head phones I can hear some CW, but nothing from the speaker, and it certainly doesn't sound as good as before I removed the jumpers and resistor and installed the SSB module.
> 
> I get the SSBA and SSBC in the menu display OK.  The next step (Third step on page 15 of the KSB2 SSB Adapter assembly and operating instruction book) states to "Tap MODE" to select CW mode.  I presume this means AFTER you have exited the "MENU" function.
> 
> Anyone encounter this problem or have an idea of where to go next?
> 
> Thanks, Steve
> NE7RD