[R-390] RE: Fixture for finding low-noise 6DC6's

[Drew Papanek]

Tim wrote:

>Is there such a thing as a test fixture or something I can lash up
>to find the lowest noise 6DC6's of my collection?

There is a DIY tube noise tester at
http://members.aol.com/sbench102/RAT_Noise/

The project measures noise at audio frequencies; I'm not sure
how that test would correlate with noise performance at RF.

The site presents material primarily for the tube audiophile
but there are some other interesting projects there such as
power supplies and a transconductance tube tester.

Drew