RadioBanter - View Single Post

May 9th 06, 04:45 PM posted to rec.radio.amateur.homebrew

ORIGINAL MESSAGE:

On 7 May 2006 14:26:04 -0700, wrote:

Anybody know any tubes...st or gt shape preferred that will work on 12
volts plate voltage for small 1 tube regens...possibly a stage or two
of amplification also.

I know there were automobile radio tubes made that didnt need vibrators
but dont know any numbers myself.

*********** REPLY SEPARATOR ***********

My first job right out of high school in 1959 was repairing car
radios, just when the 12-volt anode tubes were coming out. On a whim,
I replaced some of the 12-volt anode types with conventional tubes
such as the 12AU6 and 12BA6 and to my surprise, they worked fairly
well, but with slightly lower gain. (The pin connections were the
same.)

BTW, the 12-volt anode types were notorious for developing
microphonics. It was an interesting design, but as soon as good
transistors became available, they became history.

In other words, don't be afraid to experiment.

Bill, W6WRT