In article . com,
"wb5kcm" wrote:

My Ranger has all the mods in the power
supply, solid state both HV and LV. The LV capacitor is 330 mfd and
the HV cap is 165 mfd.

Randy-

Suppose both the RF section and the modulator used 100 watts of power
each, and filaments used another 50. That would be roughly 2 Amps at
120 VAC. You should use a fuse about twice normal current, so 5 Amps
would be reasonable.

If that blows, it very well could be due to inrush current related to
the solid state rectifier conversion. Vacuum tube rectifiers would have
required a warm up, which would bring their output voltage up gradually.
Using something like a 47 Ohm 10 Watt resistor in series with the input
of each set of rectifiers, might be all it takes to tame it.

What is the voltage across each filter capacitor while in standby or
key-up? I would worry that voltage might exceed the capacitor ratings
after conversion to solid state rectifiers, especially under no-load
conditions.

Fred
K4DII