[Elecraft] [K1} Filter Board Issue/ Rapid pulse receiver noise

[Paul Kirley]

Check to be sure that you have set the correct 30-meter band edge (10.0
or 10.1, depending on your chosen VFO range).  See the manual's
instructions for setting the Bx parameters.

Some years ago I had a problem similar to your first one.  It turned
out to be a defective pair of relay contacts on my 4-band board.
Lacking suitable tools for removal of the relay, I sent the board back
to Elecraft for replacement of the defective relay.

To diagnose this situation, set up the K1 so that you are having the
low sensitivity/output problem on 30 meters.  Then shut off the K1
without changing bands, remove the 4-band module carefully and measure
the resistance across every pair of relay contacts (not the coils, just
the contacts).  Of course, every pair should read either infinite or
zero ohms.  In my case, one pair read about 50 ohms--that relay was the
culprit in need of replacement.

An e-mail to support at elecraft.com got me permission to return the
board for repair.

73 es GL, Paul W8TM


Quinton NU7Y sed:
>  I have a K1 with the 4 band filter board (40,30,20,15). I recently
removed this board and tested a two filter board (80,17) that had come
with this radio. The second board worked fine but the problem I have is
that when I replaced the original filter board and reconfigured the
band settings, something changed and the received signals on 30 meters
are very weak and seem to be heavily attenuated and the transmitter
will only load to .1 watt.  The problem is specific to 30 meters only
as the other bands are working properly.  I have checked the pins on
the filter board and they seem to be o.k. I inspected the board and
don't see any components that could have been moved or damaged.