On 23 Jun 2005 18:07:27 GMT, Stan Barr wrote:
On Thu, 23 Jun 2005 10:58:02 -0400, Chuck Harris
wrote:

12V plate tubes are rather rare, perform poorly compared to most anything else.
They are very low power, low gain, and low frequency.

Philips produced a number of low-voltage tubes,such as the DAH50, A221 and A441,
in the '20s and '30s that people built successful radios with.
A few people have experimented in recent years with using normal tubes at
low voltages, try googling for "space-charge tubes".

See: http://www.duntemann.com/12vtubes/12vtubesindex.htm

--
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!