[Elecraft] ] K2: Very strange power problem has cropped up *** RESOLVED***

[Bob Evans]

Thanks for all the reflector's input in resolving this issue.  P1 on the
KSB2 board needed to be re-flowed and the rig is back to perfect.  Special
thanks to Don Wilhelm for nailing it.  I don't think he ever sleeps!  ;-)

73,

Bob K5WA

 

Bob Evans wrote:

> My K2/100 has been working great for the year and a half (except for a 

> bad power cord once) since I built it, but it just recently presented 

> me with a perplexing problem. Since I don't get on SSB very often, I 

> don't know how long this has been an issue, but the symptom is that 

> when I start transmitting in SSB, power is OK for about 3-4 seconds 

> and then power shuts down to zero on both SSB and CW. When I remove 

> the SSB board and install bypass jumpers (and recommended capacitor), the
rig works perfectly in CW.

> When I reinstall the SSB board, same problem; i.e. 3-4 seconds of good 

> SSB power and then power shuts down to zero.