• 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.

The ultimate OTL6080

Ah, OK - I see - thanks !

Why not ? I would be worry though by the proximity of the 6C33C vs. the other parts, about temperature, and rather choose a larger chassis and/or a much more serious cooling (i.e. chimney effect around these power tubes, like I do on my U-OTL). In fact, those big 6C33C not only heat the air, but also generates much infra-red !

1691197943473.png


To give an idea, here's the temperature I took on the top of one of the 6080 on my U-OTL : 190°C at 5mn after starting :

1691198002338.png


T
 
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Hi Tubelectron,
The thread popped up again, nice! I read a lot through it when you were building the amp, also a lot of proposed modifications and so on, so my question: can you post the latest schematics? Maybe even better if you could post it in the first post of the thread (ask a moderator)?
many thanks, Erik