[Hallicrafters] Inrush current limiters in vacuum tube equipment.

[Mark Shaum]

I've retrofitted some of my tube gear with these over the past year.
The CL-90, 2 amps continuous, serves in most of the receivers.  I tried
CL-130's rated at 1.5 amps, but the delay is more significant with
CL-90' with a different cold resistance.  I saved the CL-130's for
smaller receivers like the S-40 and HQ-110 series.

I've used CL-60's, 5 amp, for the 100 watt class exciters (HT-37).

The limters do run hot.  That's about the only thing to watch for, they
should be mounted pretty much in the open and not lodged in next to
other components or wiring.  A side benefit to the heat is that the
things are absorbing a couple volts of my higher than usual line voltage
during normal operation.  And definitely wire them AFTER the line fuse.

They are not expensive.  You could buy a whole lot of current limters
for the cost of one power transformer :) - Mouser tends to be out of
stock of the higher current versions, I wanted to try a pair of the 16
amp ones in my SB-220 primaries.

Mark  K9TR