[R-390] obtaining SSB detector crystals

[djed1 at aol.com]

Hi Perrier
Not overlooked at all in my and Alex's previous circuits.  When I developed the circuit back in 2010 I knew available add-on product detectors didn't address the need for a better AVC function.  So my design added an AVC circuit which still satisfied my requirement for the SSB adapter to be purely an add-on using the available access points on the rear of the radio.  Since the AVC lines are available on the rear of the radio, this was not a problem.  I found I didn't have to disable the internal AVC line, but simply to use the add-on AVC to perform the fast attack part.  So the adapter just connects to the back of the radio, and all radio functions work as before (except you use the adapter to tune the BFO).  I can supply a pdf of my (and Alex's) circuit, but it requires some skills to source parts, build and test.  Otherwise, the treetop circuit may be your best bet.
Ed  W2EMN

-----Original Message-----
From: Perry Sandeen via R-390 <r-390 at mailman.qth.net>
To: r-390 <r-390 at mailman.qth.net>
Sent: Mon, Aug 12, 2019 2:51 am
Subject: [R-390] obtaining SSB detector cr
Yo Bubba Dudes!,
A number of posts have discussed obtaining crystals and some previous published circuits.
What seems to have been overlooked is that the A's AGC circuit must be modified for proper SSB operation.
So one is faced with one of two choices.  Do I dig into my A and modify circuitry as Chuck Felton, or others have done or do I want to buy a turn-key solution?  The Tree-top SSB adapter does all the SSB functions on one small PC board.
I'll pay the $100 instead of digging into my receivers.  YMMV (I have no affiliation with Treetop.) 

Regards,
Perrier
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