[Elecraft] Silent power supply for a K3s

[Dave B]

Easy way out of this mess, if a little expensive...

A big PSU dedicated to the rig(s), implementing "Remote Sensing" so at a
distribution point close to the radio(s) the DC voltage is held
constant, irrespective of the cable length from the PSU.

This power supply should have a proper overload (and over voltage)
protection scheme too, not only to protect itself, but the radio(s)
also.  And safety resistors between + and +s, also between - and -s
terminals.  (Prevents expensive embarrassment, if a sense line fails!)

Then use a smaller PSU for the low power accessories, with suitable fusing.

Any QRO power amp, needing really high current, should have it's own
independent dedicated PSU, again with remote sensing to keep the voltage
at the PA as near constant as it can be, and the resulting high DC
currents, purely between the PA and it's PSU.

Just my way of doing things, to keep the high DC currents out of the RF
cabling.

Google "power supply remote sensing" for more info.

73.  Dave G0WBX.


-- 
Created on and sent from a Unix like PC running and using free and open source software: