wrote:
On May 21, 8:01 am, (Scott Dorsey) wrote:
In article ,

wrote:
On May 16, 3:18=A0pm, "David Thompson" wrote:
Sure a solid state one would be OK. =A0There is a solid state SSB adapter =
on
Ebay for the little solid state receivers ($40 or so). =A0Just need to get=
one
to match the 455 IF as I am betting the little Chinese RX has an odd ball =
IF
probably 30 mhz or higher!
Dave K4JRB

Those radios have a 455 if output to connect to that adapter.

What is this adaptor and this radio? Anybody got an actual name?

E-Bay Item # 140138471416

This just looks like a simple BFO... I do not see any filter or detector
here. Useful enough, but not so high-performance.
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."

"Richard Knoppow" wrote in message
m...
As far as selectable sideband in an SSB adaptor AFAIK
all worked by means of either shifting the signal to the filter frequency
or having two filters. I don't see how phasing would work in a receiving
adaptor. There were numerous phasing type SSB generator for transmitting,
for instance the one made by Barker and Williamson who also made 90degree
audio phase shifting networks for use in home made ones. I still have the
B&W adaptor I used in the 1960s. It worked pretty well but had to be
adjusted for any large frequency change. Stable high performance filters
or reasonable cost pretty much ended the use of phasing type exciters.
---
Richard Knoppow
Los Angeles, CA, USA

WB6KBL
What is even neater is if it would be possible to make the
entire phasing using passive components. (I suppose it is,
but it would have excessive losses?) In one direction
it would demodulate only one sideband; while feeding audio
back into would in turn generate an SSB signal. IIRC, the
math shows the sidebands would be "reversed" between RX
and TX functions, however...

Pete k1zjh