[Boatanchors] RE: [Hallicrafters] Byron has a Manson, Bob has a different Manson

Wed, 14 Jan 2004 13:56:02 -0500

Bob's Manson is an ISB receiver (independent sideband - LSB and USB can be
received at the same time on separate channels on the same frequency) with
synthesizer control and what looks like a tunable preselector/input filter.
It doesn't have a military tag on it.

Byron's Manson is  part of the military GRC-129 system which was a dual
diversity system including 2 R-1247/GRC-129 receivers (Manson modified
R-390A's with relays enabling to switch the receiver from the internal
local oscillators to the external synthesizers) and modified T-368
transmitters (synthesizer input instead of the local VFO, AM modulator
removed and SSB exciter installed instead.

I had the set of the synthesizers and the receiver sideband adaptors a few
years ago, which I sold to someone who was restoring a GRC-129 system.

73, Meir WF2U
Gowensville, SC

-----Original Message-----
From: [email protected]
[mailto:[email protected]]On Behalf Of [email protected]
Sent: Wednesday, January 14, 2004 1:19 PM
To: [email protected]
Cc: [email protected]; [email protected];
[email protected]
Subject: [Hallicrafters] Byron has a Manson, Bob has a different Manson

Bob was told his Manson came from a missle silo but is skeptical.
Byron's Manson needs a R390(A?) to make it work.
Bob's Manson appears to be capable of working without any external help.
But, he doesn't really have a clue what he has, so have a look.

http://www.edebris.com/catalog2/item/1080

and please tell me what you know about it.

It uses vacuum tubes in both units.

73,
-bob
ah7i

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