ak_47_boy said:
The 866 will also need a few minutes warm up time where as the 3B28 does not.
Nah ... 10-30 secs are enough if you use the tube every day. Warm it 1 hour or more after the first installation before applying any high voltage. If it doesn't light up after a couple of attemps and it keeps on blowing your fuses just forget it, sometime it happens with MV rectifiers.
Ciao
Gianluca
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