[Boatanchors] Sp-600 info

[Al Parker]

Hi Greg and folks,
	Well, Greg overestimates me.  I've tried to keep up the Hammarlund 
Historian website, but have done a lousy job of that the last several 
yrs, after Al Waller's crash decimated it.  Maybe one of these days  --  ?
	Anyhow, Grant hit it correctly, the -JX-21A had the prod.det. installed 
at the factory.  I don't find the manual for it among my stuff or the 
website, or Andy Moorer's website.  <http://www.jamminpower.com> Not 
sure I've ever seen the manual or skem.  Andy may chime in, he remembers 
more than I've known.  Or Les Locklear, the Historian.
   from <www.hammarlund.info>:
	SP-600-JX-21-A  -  Manual - ISSUE 1 (DEC. 1969) PRODUCTION BEGAN IN 
JUNE 1969..WITH SSB DETECTOR BUILT IN..AND LAST OF THE SP-600's BUILT 	
73,

Al, W8UT
www.boatanchors.org
www.hammarlund.info

"There is nothing -- absolutely nothing -- half so much
worth doing as simply messing about in boats"
Ratty, to Mole

On 6/27/2013 12:28 PM, Greg Roecker wrote:
> Larry,
>
> Al Parker, W8UT is the guy that knows the most about the SP-600.
>
> There is an article in the March 1967 CQ magazine, page 67 on "A Product
> Detector for Military Receivers" that describes a circuit for the
> SP-600. There is also an AVC mod to change the AVC to fast-attack
> slow-release.  I have no experience with either circuit so can't comment
> on how they work.
>
> 73,
>
> Greg/n4osj
>
> -----Original Message----- From: telegrapher at q.com
> Sent: Thursday, June 27, 2013 12:19 PM
> To: Boatanchors
> Subject: [Boatanchors] Sp-600 info
>
> I wonder if there was ever a product detector circuit ever built for
> inclusion in the radio for one of these?  Or if one was just conjured up
> out of existing circuit design?  If so, what tubes did it utilize and
> what tube(s) did it replace?
>
> Larry
> W0OGH