The ICOM R-71A is excellent but pricey. However I've found success with
automobile radios. You can buy or build a 12 volt 1.5 amp power supply
inexpensively.

"Graeme" wrote in message
...
Am looking for a reasonable cost BCB superhet tuner or receiver (valve or
solid state) which has a known sensitivity of 0.1 microvolts or less for
10
dB s+n/n ratio. May be a manufactured or kitset radio. All advice and
references appreciated. TIA.
Graeme

In article , Blue Cat wrote:
The ICOM R-71A is excellent but pricey. However I've found success with
automobile radios. You can buy or build a 12 volt 1.5 amp power supply
inexpensively.

Old 1970s car radios are in general extremely sensitive. Selectivity is
sort of doubtful on a lot of them, but because they are normally used with
a small whip antenna, high sensitivity is essential. A Delco AM radio
should be available for free at your local junkyard.
--scott


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

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.

Bill, K5BY

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

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.