RadioBanter - View Single Post - Hallicrafters s-38C question

March 3rd 04, 05:07 AM

In article ,
writes:

Hello Chris,I think you should examine the RF coil assy. and check for
open circuit in BC input...think about this, If this receiver had an
external antenna connected and was sitting there on the BC
band,turned off,and a lightning charge came along it would most likely
burn out the BC RF coil,making it extremely weak on that band.

This is good advice -- check that primary.
I'd like to add that many antenna primaries get blown out because someone
discovers that a ground makes a pretty good antenna -- because it's using the
hot side of the house power wiring as an antenna. If your line bypass caps are
leaky, you'll get excess AC current thrut he antenna to ground -- I've seen
sparks thrown, not big fat ones, jsut enugh to let you know it isn't good for
the coil.

And if you have a fancy antenna system with a baluyn coil, then for 60 cycle
AC, the "hot" antenna lead is as good as ground, so be sure to hook up the
ground side first. Which is just hte opposite of what PL-259 coax connectors
do ,,,
--Mike K.

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