[Boatanchors] Fwd: Inrush Current Limiters

[Rob Atkinson]

Is this in-rush concern pertaining to transmitting or firing up the
filaments?  It is a 100 watt rig and probably has a 10 H choke on the
power supply filter for the B+ as a choke input filter.  That choke
should be all the B+ supply in-rush limiting you need.  Even if EFJ
did like Hallicrafters HT-20 and put the choke on the secondary CT and
a 10 mfd oil cap bypass to ground on the diodes, 10 mfd isn't much C
to cause in-rush probs.    I just don't see filaments needing in-rush
limiting.

Fuse:  If the only way you can do it is to put a fuse in the hot side
of the power cord, do it.  You can get cord insert fuse holders at
hardware stores.  I did that with my CR88, partly because I was lazy
and didn't want to drill a hole in the back chassis of the set.

Thermistor in-rush components:  They run very hot.  Position them in
the clear where they can ventilate.  In order for a thermistor to work
it has to start cold.  If you power cycle one when it is still hot it
won't do anything.

I really don't think you need anything for a V2.

73

Rob
K5UJ