A number of Australian hybrid car radios of the 1960 period used
special valves based on 12v HT but the output stage used transistors.
Heaters were 6v with pairs of tubes wired in series. Tube types
included 6DS8, 6DR8 & 6ES8 for RF, Mixer, IF and detector stages.

These sets would not have worked with dry cells due to the use of
tubes with heated cathodes.

Simon.


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).

I wonder if it is a 12V tube kit. Perhaps a 12AE7 or similar.

Anyone know?