[Boatanchors] Sp-600 info

[Richard Knoppow]

----- Original Message ----- 
From: "Grant Youngman" <nq5t at tx.rr.com>
To: "Boatanchors" <boatanchors at mailman.qth.net>
Sent: Thursday, June 27, 2013 9:37 AM
Subject: Re: [Boatanchors] Sp-600 info


> The very rare JX-21A came with a crystal controlled BFO 
> and product detector (6BE6 as I recall) from the factory. 
> Don't know what, if any, mods were made to the AGC.
>
> I saw one of these for sale at a hamfest in Dallas many 
> years ago, that came out of WWV in Boulder.  Only one Ive 
> ever seen in the flesh. Even then it was out of my pay 
> grade, although in hindsight ... Well, hindsight is always 
> better ;)
>
> Grant NQ5T
>
    The Lankford mod for the Collins 51J series will work in 
the SP-600   The PD is pretty good but the AVC leaves a lot 
to be desired. There were outboard SSB converters that work 
well but they are hard to find and expensive.  Both 
Hammarlund and TMC made them.


--
Richard Knoppow
Los Angeles
WB6KBL
dickburk at ix.netcom.com