[R-390] cv-1982 ssb converter

[jvendely at cfl.rr.com]

The problems with the CV-1982 are the very high cost of retubing it
due to all those nuvistors, and that its AFC design wasn't very good.
The later, solid-state Kahn CV-2712 AFC was an update (see Kahn's
patents), but was still "cranky". Leonard Kahn was a brilliant and
innovative engineer, but he kinda missed the boat on these AFC
designs. Remarkably, the CV-157's by then outdated electromechanical
AFC system actually worked more reliably...

73,

John K9WT

	-----------------------------------------From: "Dottor Federico
Baldi" 
To: "D. Resor", "Phil", "R-390"
Cc: 
Sent: Friday July 17 2020 4:59:53PM
Subject: [R-390] R: cv-1982 ssb converter

Hi I have had a CV-1982 in my shack for some years and was a good SSB
 demodulator for R-390A/URR, but really not necessary if you employ a
diode
 bridge between AGC (3,4 neg) (GND 16 pos.) (10 with a resisto r 600
ohm -
 10 Kohm 1 W) and (13) on the rear strip. 73 de Federico IZ1FID

 -----Messaggio originale-----
 Da: r-390-bounces at mailman.qth.net  Per conto
 di D. Resor
 Inviato: venerdì, 17. luglio 2020 14:21
 A: 'Phil' ; 'R-390' 
 Oggetto: Re: [R-390] cv-1982 ssb converter

 Looking at the images:

 It appears to be Nuvistors of the 7587 (of which there appears to be
a total
 of 12). There are also 8056s and 7895s. From the scan of the brochure
it
 is mentioned that transistors are also used.

 I could not find any information in an online search. BAMA and the
Radio
 Museum has no data either.

 Don Resor

 -----Original Message-----
 From: r-390-bounces at mailman.qth.net  On
 Behalf Of Phil
 Sent: Friday, July 17, 2020 4:26 AM
 To: R-390 
 Subject: [R-390] cv-1982 ssb converter

 There's one on Ebay at

  Help: 

Links:
------
[1]
https://www.ebay.com/itm/Kahn-Research-Labs-CV-1982-TSC-26-SSB-Converter-for
https://www.ebay.com/itm/Kahn-Research-Labs-CV-1982-TSC-26-SSB-Converter-for
 />
-R-390-RARE/193578225523?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m143
 8.l2649
 
 Is anyone familiar with it? Tube complement?
 
 thanks, Phil W5BVB
 
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