[Elecraft] Silent power supply for a K3s

[Peter Dougherty]

Hi all,
I would like to find a power supply to power the K3s that is completely
silent. I've owned an Astron RS-35M, which was great until it started
buzzing like crazy. I swapped that out for a Samlex SEC-1235M, and did the
fan mod to keep the fan on constantly at low speed. The problem here is that
when I'm running FT8 or RTTY for more than about a half hour, the fan goes
into high speed and stays there for an hour or more, long after the rig and
amp's fans have shut off. And because it's a tiny fan moving a lot of air,
it's incredibly loud.

I'm looking for an RF-clean power supply (either linear or switching) that
can deliver 25A continuously without requiring a cooling fan of any kind.
All it's running is the K3s/P3 and a couple of boxes with less than 1A draw
each. The front panel meter on the Samlex is showing a tad over 20A when
transmitting 100W in FT8/RTTY. Any suggestions? Within reason, cost isn't a
major issue.


---------------------------------------------
73 and Good DX
Peter, W2IRT