My K1 is Alive!

Tonight I continued with the combined tests of the RF board (part 1), front panel board and filter board. All tests up to the VFO test are ok, including LED/LCD, error codes, sidetone generator, voltmeter, keyer and filter board relays. On the picture below you can see the very first thing K1 says, when no filter board is found.

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Successful Filter Board Tests

After completing the assembly of the K1 filter board, I have done the resistance checks on the board. All checks tests passed perfectly 🙂
The next step will be to proceed with the tests of the RF board and then the combined tests and alignments of the RF + filter boards, which in fact is the same as the complete receiver alignment.

K1 Filter Board

I have finished mounting all parts on the filter board, except the inductors and plugs. I was surprised by how badly some of the capacitors fit in the holes. It is not quite what I am used to from Elecraft but it’s really no big deal. Maybe the capacitors don’t fit because the original ones have been replaced with better ones.

Here is a picture  of my progress:

Elecraft K1 filter board

K1 Front Panel Finished

Hmmm… After finishing the front panel I have three resistors left:

  • 330 ohm: This one was an option for low intensity backlight, saving a few milliamps.
  • 220 ohm: This one is sitting in the strip, thus it should be part of the standard assembly. Very fishy, since it is not even listed in the parts list. Maybe it was originally intende for the high intensity backlight?
  • 100k: THere are four 100k resistors listed in the parts list, all four of them is mounted.

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