Fw: [Hallicrafters] SX-110A question

[Troglodite at aol.com]

In a message dated 1/23/05 1:20:05 PM Central Standard Time,  wb8jkr at juno.com 
writes:

I  understand the reason for the capacitor, its
the 470 K resistor that has me  baffled.



The purpose of a resistor found between the chassis and one of the line  cord 
connections is to bleed off any charge that may develop on the chassis due  
to the connection to an external antenna.
 
In the late 50's and early 60's this was a UL rule. Any device with a  
connection for an external antenna had to have such a resistor. It could be  found 
on virtually every FM tuner produced during that period.
 
I don't know if it is still a UL requirement today for devices with a two  
wire cord.
 
Doug Moore