I purchased a second hand K1 a few weeks ago and am in the process of
installing a new KFL1-4 that I just finished building.
The K1 is serial number 00863. The RF board is Rev. D and and the unit
is equipped with MCU 109E, which I think is the latest firmware version.
1. I didn't have the Errata sheet in front of me and managed to install
all of the trimmer capacitors on the KFL1-4 board backwards. The
trimmers have two flat sides, not one (which was confusing...without the
Errata in front of me). I read that the adjusting screw is to be on the
side that connects to ground. Thinking I was a smart guy, I used an
ohmmeter to determine which trimmer terminal that was...and I still
managed to get it wrong! Anyway, I used a non-metallic screwdriver to
do the alignment and all went well. That said, is there any reason why
I should remove and re-install (or just replace) the trimmers now?
2. All went well when I did the 4-Band Transmitter Alignment on page 19
of the KFL1-4 manual except that output on 15m is approximately 200 to
300 mW on the K1's internal and an external wattmeter. Output on all
other bands was 2+ watts. Output on 15m remains at 200 to 300 mW even
when I increase the power to 5W. All other bands are OK. Low output is
covered in the Troubleshooting section, but not that I can see when it's
only 1 band out of 4. Any thoughts?
3. I didn't get the original manual with the K1 and there are several
differences between the Rev. D RF board and the manual I downloaded from
the Elecraft website. The Rev. D RF board doesn't have a place for S2
(for transmitter offset adjustment). However, there appears to be a
location for a switch at the front of the board, on the bottom and
immediately behind the P1 header. Same thing? Just in a different