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Old September 15th 05, 09:00 AM
Stan Barr
 
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On 15 Sep 2005 01:27:23 GMT, Steven Swift wrote:
A while back there was a 12v tube thread.

I saw this:

http://www.thamesandkosmos.com/products/ra/ra2.html

advertized in September Scientific American. The ad (on the
builditplayit.com site) says it uses a "double triode" and
requires 8-AA batteries (nominally 12V).


A goolgle for "space charge tubes" will probably turn up a lot
of info on low voltage tubes.

The Summer 2005 edition of Sprat, the GQRP club magazine, has a circuit
for a vfo using a XFY43 hearing aid valve/tube running off 12V. Better
stability than a fet oscillator, apparently.

--
Cheers,
Stan Barr stanb .at. dial .dot. pipex .dot. com
(Remove any digits from the addresses when mailing me.)

The future was never like this!
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