• 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.

Noob Question - what are these...?

Would appreciate your assistance, since I'm totally lost here.
Bought a second have Access Virus C, with tube amplification.
I want to understand more about this, as well as be prepared in case something happens - with spare parts 🙂

I'm attaching pictures of the way the tubes are installed, as well as the tubes in close ups.

Again - would appreciate any thoughts.
Thanks
 

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Hey thanks - as I wrote, this is a 2nd hand virus C and the tube amplification was done by someone in Holland. I am trying to reach him but also trying to do some parallel research. Obviously If I'd reach him, I hope he'll have the answers ;-)
 
Sometimes if you put the tube in the refrigerator to cool it. Then go outside on a very sunny day, breath some condensation on the tube, the faded etching of the tube number will pop out. Or inspecting it under a 15,000 lumen LED work light works too.