[R-390] A few SP-600 questions

[Steve Hobensack]

Since you are playing with an SP-600, read issues 20 21 22 of "Electric 
Radio" magazine. There are a number of improvement mods, and the mc1496 
balanced mixer product detector is a winner.
73...Steve..KJ8L


>From: "Jack Antonio" <scr287 at sbcglobal.net>
>To: <r-390 at mailman.qth.net>
>Subject: [R-390] A few SP-600 questions
>Date: Mon, 5 Jul 2004 13:02:25 -0700
>
>The universe decided I needed an SP-600-JX-17, so one
>is now gracing the workshop.  An initial inspection showed
>disc ceramics instead of BBOD caps, and no obvious B+ shorts
>or any major DPO mods (DPO=dreaded previous owner)
>so I fired it up, and it seems to work pretty decently.  The BFO center
>frequency was way off, but a quick tweak solved that, but I'm sure
>it needs a little work with the test equipment.
>

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