[Hallicrafters] Off-net correspondence placed on-net.

[W4AWM at aol.com]

In a message dated 10/8/03 9:22:20 PM Eastern Daylight Time, john at cusick.ws 
writes:

> What are "SS" diodes?
> 
Solid state diodes. These are wired across the rectifier tube sockets which 
provide a "modification free" terminal strip in case you ever want to restore 
the rig to original.  Be sure to remove the affected tubes before firing the 
rig up. Even with this done, the rig should be brought up slowly using a variac. 


The main reason for this modification is that it removes some of the heat 
buildup in the power transformer caused by the current draw of the rectifier 
tubes.  The HT-37 and several other Hallicrafters rigs are plagued by heat buildup 
in the power transformer, resulting in a short down the line.  In the case of 
the HT-37, a lot of these shorts have been between the 5V and HV windings.

If you observe the other notes on the HT-37 you have seen here, you should 
wind up with a really nice piece of vintage gear.

good luck and 73,

John,  W4AWM


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