Conclusion on the Filter Alignment

I have tried to use my other dummy load on the FT-817. It did indeed reduce the signal strength in the K1 quite a lot. This may sound a bit strange but it is not. You know, the DL-1 dummy load kit from Elecraft is an open dummy load, meaning that it is not in an enclosure, thus the RF signal is radiated from it. My other dummy load, on the other hand, is built into a piece of cooling metal and looks much more radiation closed than the DL-1 does.

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K1 VFO Checks

The VFO range check is perfect. Without needing to do any modifications, not even squeezing or sopreading the turns on L1, I have a VFO range between 2.993 MHz and 3.094 MHz. The VFO seems as stable as a VFO of this kind can get. There is a frequency shift of 1 kHz down if … Read more

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 … Read more

Coils for the Filter Board

I have just finished mounting the coils onto the K1 filter board. It turned out that some transformers need their secondary to interleave with the primary, on the contrary to what I mentioned earlier. I guess it depends on the function of the transformer.

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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 … Read more

The K1 is Taking Shape

After mounting L2, T1 and T2 on the RF board, it was time to mount the side panels on the RF board and mate it with the assembled front panel board. This has to be done before the receiver alignments and it is really cool, because I can now see the K1 taking shape:

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