• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

5691 black base?


2004-07-20 3:22 pm
Hi Burntfingers
The only thing I know is RCA made red bases and rebadged them for other companies like GE
whlie sylvania and others made them with brown bases and supposedly the same but I don't
about black what brand is it ? They should all be special quality 10000 hr and closely matched sections and such.