[Elecraft] K3 no RF output

[Jim N7US]

Todd,

I experienced the same problem a couple of months ago.  I never noticed a
fault, but maybe it did it, and I didn't notice.

I emailed Gary (support at elecraft.com) and tried the EE INIT including
reloading previously saved configurations.  I ended up sending the radio
(S/N 3598) in.  Keith found an IC that wasn't properly soldered, but really
nothing else.  It never malfunctioned while there.  He did extended burn-in
sessions and installed a couple updates, including De-Oxit to the front
panel connections.  It's worked fine since then.  I was charged for an hour
of time, and I imagine he spent more time than that.

It was unsettling to not have conclusively determined the problem,
especially since it seemed to happen without warning, but it's been working
fine.

73, Jim N7US


-----Original Message-----
From: T Gahagan [mailto:wa7u77 at gmail.com] 


My K3 produces no RF in transmit at the 10 watt or 100 watt levels.  The
display shows two horizontal lines during transmit and shows 0.0 watts
output.  I have loaded older (4.47) firmware and then reloaded newer (4.48).
I have done a re-initialization and reloaded all parameters.  I removed the
KPA3 and reinstalled it.  No noticeable burned components were found.  I
believe the K3 did show, very briefly, a fault 6 and fault 7 but it was a
very brief flash in the display.  I thought SWR sensing diodes might have
been the cause so I replaced D36 and D37.  Any help would be appreciated.
Thanks

Todd