[R-390] Kahn SSB Converter

[Sheldon Daitch]

With all due respect, ISB was not unique to the US military.

The VOA ran ISB transmitters at both Greenville transmitter sites,
and I am almost sure the same for Delano and perhaps Dixon, as
well.  I never worked at Delano but my notes indicate #9 and #10
at Delano were Continental 617As

When we were still in the HF relay operations, there were three
transmitters at both Greenville sites running ISB for our program feeds. 

Transmitters #10 and #11 at both Greenville sites were TMC GPT-40s
and #9 at both sites were Continental 617As.   All the exciters at 
Greenville were
TMC MMX-2 units, capable of running ISB and were the wide band
audio options, with 5-6 kHz wide filters.  Don't hold me to the exact
bandwidth, as I don't have a TMC manual handy.

The TMCs at Greenville originally used one of the tubed versions of TMC's
ISB exciter systems.  The equipment was in the rack in 1979, when I started
working there, but the MMX-2 was the operational exciter.  Last time I was
in Greenville, 2005, maybe, all the old tube tube exciter units were gone
with only the MMX-2s in place.

73
Sheldon
WA4MZZ




rbethman wrote:

> It uses nuvistors.
>
> It is NOT a "NOT" a plain Jane SSB converter.  Its purpose was to 
> receive ISB, (Independent SideBand),  a unique method used by the U.S. 
> Military.
>
> Bob - N0DGN
>
>  
>