[Elecraft] 13.8V DC Supply

[Howard Hoyt]

>>Mike, KW1ND said:
>>Seems to me Elecraft already has a great linear DC supply:
>>It's built into the KPA500.
>>Repackage it as a stand-alone, done.

It is too late to add a 13.8VDC aux supply to the KPA-500, and besides, I don't know if it has an internal supply with appreciable current capability other than the main PA 80V supply.  To down-series regulate this to 13.8 would incur unacceptable power loss and heat in the pass element.  It would have been nice though, to only have the one AC power cord!  Great idea...now if you just had it a few years ago while they were specifying the power transformer...lololol

The concept reminds me of how I operated mobile years ago (showing my age here) with the Drake R-4B/T-4XB twins, the 13.8VDC input DC-4 supply supplied all the voltages for both rigs including a 115VAC receptacle for the R-4B.  (Unfortunately the DC-4 switched at 330Hz, resulting in a continuous low-level whine IIRC).

back to Elecraft issues...

Howie - WA4PSC