[Elecraft] K1 Relays Not Working

[Don Wilhelm]

Rich,

I assume this is a 2 band filter board.

Either the KFL1-2 board firmware (U1) is not working, or the 6R/AUX 
signal is not getting the the filter board U1 pin 13, or there is a 
problem with the relay switching paths.

First check the resistance across each relay coil (pins 1 and 10) of 
each relay.  Each relay should be about the same.
Then check the soldering on the header for RF Board J7 - re-flow the 
solder with a hot (750 degF) iron.
Be certain the filter board R1 is 100 ohms and well soldered.

73,
Don W3FPR

On 6/22/2013 7:40 AM, Richard Crispi wrote:
> Hi,
> I'm in the process of building K1 #3224 and all was going well until this
> evening.  I'm at the point in Chap. 7 Alignment and Test, Part 1 "Band-Pass
> Filter Alignment" (pg. 40).  I was able to align B1 (40 meters) but when I
> attempted to start B2 (30 meters) I realized that the relays were not
> switching and I could still hear the 40 meter signals although the
> frequency display showed the 30 meter frequency.  Everything else up to
> this point seems to be working fine but no relays are switching; not on
> power up or when I try to change bands.
>