HP 23A Power Supply powering the Collins KWM-2A

[@jeromekaidor7254]

I too have a KWM-2 powered by an HP-23A! I created a custom patch cable. I powered the filaments off 12.6V instead of 6.3. Less current to run through the cable. My biggest problem was the B+ 275V. The HP-23 had two settings - one too high, and the other one too low. I set it to the "too high" setting, and put a high voltage regulator to take it down to 275. Before the regulator, I put in a long string of rectifier diodes to scrub excess voltage. I forget exactly how many, it was something like 50 of them.

[@davenewmyer3735]

Nice setup ! Just curious if the secondary crystal bank can be set up with WARC band crystals?

[@N2FQ]

Yes.. If you can find the crystal pack (CP-1). Or you can find individual crystals. For example...30M.. need a 13155.00khz. See this list : s88932719.onlinehome.us/Collins_CP-1_Crystals_List.htm.