[Hallicrafters] What's a SX-100? - retro fitting mods

[Rodney Bunt]

All,

The BFO feed from the BFO Oscillator came from the "plate" not the "Grid", there were minor
changes to the AGC, including switching in a capacitor to slow down the AGC when switched to BFO. 

All of these changes (except changing the 50kHz IF freq) can be retro fitted to pre MkII SX-100,
you will need a Double pole single throw swich to do the AGC mod. I stole the send/receive switch
for this purpose ( changed the switch from send/receive with the BFO switched), as I do not have
my SX-100 teamed with a transmitter.

Rodney
VK2KTZ


--- Dave Moorman <dmoorman4 at attbi.com> wrote:
> The real experts on the list will be able to answer your question, David,
> but the differences were relatively minor.  I think the 2nd IF changed from
> 50 KHz to 50.75 KHz in some of the models and there were also some cosmetic
> changes, like different knobs.
> 
> Don't know if any model was a significantly different performer than the
> others.  
> 
> Dave
> 
> 
> 
> > From: "David Harmon" <k6xyz at attbi.com>
> > Date: Tue, 16 Apr 2002 19:29:54 -0700
> > To: <hallicrafters at mailman.qth.net>
> > Subject: [Hallicrafters] What's a  SX-100?
> > 
> > Hi Gang......can someone please tell me what the difference is
> > between a SX-100, SX-100 MK1A and SX-100 MK2.
> > Also, I am not sure that I have the MK#'s correct either!
> > Thanks
> > Dave K6XYZ
> 
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