In article , WShoots1 wrote:
Selectivity is sort of doubtful on a lot of them,

Back in the 1950s, even 1960s, car radios were used as tunable I.Fs for HF ham
band convertors for mobile reception, like those made by Gonset.

Yes, but they weren't exactly good. Okay, they weren't any good. I built
a really neat 10M converter using a compactron from a QST project and found
the selectivity issue was pretty serious even though most folks were running
AM and the bands weren't as crowded.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

Yes, but they weren't exactly good. Okay, they weren't any good.

G I'd never owned any of them, which ranged from 75M to 10M. Gonset made a
tri-bander, too, for, I believe, 75, 20, and 10.

I had a separate transmitter and receiver for 100W 75M mobile (with three
dynamotors in the trunk!). Then I bought a Gonset Communicator II for 2M. I had
great fun with that.

73,
Bill, K5BY

In article ,
"R J Carpenter" wrote:

"Graeme" wrote in message
...

Am looking for a reasonable cost BCB (MW) superhet tuner or receiver
(valve
or solid state) which has a known sensitivity of 1.0 microvolt or less for
10 dB s+n/n ratio.

1 uV at what impedance? what bandwidth?





GE Superset

The Gonset converter worked fine: it was the car radio which was
wholly unsuited for the task. But they are fine for BCB DXing if the
IF is narrowed down, or as is, given a good antenna, for audiophile
AM.

Best is an aircraft ADF set. New ones are several thousand dollars
but old tube and non-TSOd early SS types may be had cheaply. I got a
huge pile of tube and early solid state avionics-dynamotors, tuner
assemblies, and all-from a FBO who was grateful I'd haul it off.