[Hallicrafters] HT-32 Mystery Circuit

[David C. Hallam]

Maybe I have misinterpreted your post about AALC in a HT-32B but I am not
aware that such a circuit exists in a HT-32B.  Over the years there have
been several articles about adding ALC to the HT-32 transmitters, but to my
knowledge they never came from Hallicrafters that way.  If they did, please
educate me.

David
KC2JD/4

----- Original Message ----- From: "Jim Zellmer" <jim at ka0vsl.com>
To: <kt4ae at bellsouth.net>; <hallicrafters at mailman.qth.net>
 Sent: Monday, March 31, 2008 7:58 PM
Subject: Re: [Hallicrafters] HT-32 Mystery Circuit


Those diodes might be a modification for an (AALC) amplified automatic
load control like the one in the HT-32B.  I seem to remember a segment
is a old Hints & Kinks manual about this one.  I will have to rummage
through my old books and will scan a copy if I find it.

Jim Zellmer
KA0VSL

Harry Vaught, KT4AE wrote:
<snip>
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.

<snip>