• 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.

6C33C-EB / 6C33C-EV extended life ?

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tubetvr

tubetvr

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Joined 2003
qtron.se
6C33C-EB or 6C33C-ES have a 3000 hour service life instead of 1000 hour.
Click to expand...

The life time given in the data sheet is when running the tubes at max allowed parameters and within this life time the tube will still fulfill conditions that are valid for military applications. In practice there is no difference between different 6C33C tubes they are just sampled and tested differently and therefore have different classification.

For Audio usage the service life is very long, easily exceeding 10000 hours. I have used the same set of tubes in my OTL for more than 6 years without problem and even longer in a SET amplifier. My experience is that 6C33C tubes have longer life than more common power tubes like EL34.

In short, don't worry!

Regards Hans
 
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