[Elecraft] K2 RX/TX Problem

[Vic K2VCO]

JohnK1JD wrote:
> Trusty K2/100 SN#583 has a problem which is the first significant
> issue since building the basic K2 in Oct of 1999. The has been mostly
> unused (neglected?) since the K3 arrived last November, but decided
> to fire it up the other day and discovered that both RX and TX
> exhibit a broadband 'hash' sound instead of distinct CW when first
> turned on, both on signals received and on its transmitted signal.
> This problem lessens as the radio warms up and eventually disappears
> completely. I have used it quite a bit this weekend and it's been
> fine - until I turn it off for a few hours.
> 
> The frequencies for the VCO and BFO seem OK as do the voltages. Cal
> PLL was performed and completed without any errors.
> 
> Has anyone experienced this intermittent problem before?

Hi John!

I heard you on 20m this morning.

My first thought with any intermittent is always a forgotten or poor 
solder joint. It would be interesting if it had just appeared after all 
these years.

I would try reseating any socketed IC's. You could selectively cool 
components with a freon spray to try to isolate it.

Also it might help to check and see if it happens on all bands/modes or 
just specific ones.
-- 
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco