[Hallicrafters] HT-32 Mystery Circuit

[Harry Vaught, KT4AE]

Thanks to Gary, K8BKB for identifying my problem with being unable to 
bring the LSB oscillator into alignment - the LSB crystal.

While I'm waiting for the crystal, I've been doing some miscellaneous 
cleanup and minor recapping since there are very few non-ceramic caps in 
the unit.  This is where the mystery comes in.

In the compartment under the finals there is an added terminal strip. 
On it are a couple of 1N33 diodes, a .47 mfd cap, 3-.1 caps and a couple 
of resistors across the caps.  It's hooked in some subtle way to the 
finals, but I couldn't figure it out with all the back and forth.  The 
caps are 200 volt units so they aren't dealing with high voltage.  From 
this circuit there are two wires running to the SSB deck and are in 
series with the normal lead to the contact on the Function switch (wafer 
1R) which is selected in USB or LSB.

 From this limited description does anyone get a glimmer of what this 
might be? A limiter?  ALC?  The thing doesn't act like it has either a 
limiter or ALC.  It's easy to over-drive, as is normal with these units.

I have been known to just rip mods out and have gotten away with it a 
time or two on receivers but in this case the HT-32 works fine and "If 
it ain't broke, don't break it."  Also, I don't want to ever have to 
take it apart again.

Harry, KT4AE
Maryville, Tennessee