[Elecraft] K1 Relays Not Working

[Richard Crispi]

Hi Don,
Thanks for your reply.  It is much appreciated.  The problem was a couple
of unsoldered points.  My tired old eyes didn't see them at 2am when I sent
the call for help out.  After several hours sleep and a good breakfast the
bad connections appeared like magic HI HI!  Finished the K1 yesterday
afternoon and it seems to be working well.  Now on to building the antenna
tuner.
Thanks to all for your help.  You guys are great.
73,
Rich K1YRW


On Mon, Jun 24, 2013 at 12:14 AM, Don Wilhelm <w3fpr at embarqmail.com> wrote:

> 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.
>>
>>
>