"Edward Knobloch" wrote in message
news:KmoYj.505$ju1.354@trndny06...
Richard Knoppow wrote:
I found the handbook for the CE box on BAMA and will
have a look at what they are doing.


Hi,

The Central Electronics Slicer was based on the GE Signal
Slicer,
which appeared in GE Ham News, July-Aug 1951.

BANA has the issue, under the category gehamnews,
filename ge0604.pdf

The GE article shows how to build it, including the the 90
degree
audio phase shift network. It's pretty slick -
a selectable sideband adapter based on a phase shifting
circuit,
for any 450kc to 500kc i.f. receiver.

73,
Ed Knobloch

I printed this out. The GE treatment is much more
informative than the CE handbook and the schematic is drawn
in a less confusing way.
This issue of GE Ham News does not have details of the
90degree network, it refers to an earlier edition which has
an artical on building a phasing type transmitting SSB
generator. That one does not appear to be on-line, at least
not on the BAMA site.
Its interesting to me that General Electric was hep to
SSB for ham use in about 1950 when it was still quite a
novelty. Of course SSB goes back into the 1930's for
commercial purposes, maybe even earlier. I don't remember
when AT&T began to use it for their transoceanic telephone
service.


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Richard Knoppow
Los Angeles, CA, USA