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In these days I'm going to replace the original 1B3GT HV rectifier, because the final anode voltage is only 9,000 volts instead of the 16,000 volts specified. In this way I hope to get more more brightness, without turning the control too high. I've got some problems to buy a 1B3GT good: one has the filament burnt, the seller sends me another tube, wich has an internal filament defect, hitting the glass with fingers the filament gets on and off. Damned 1B3GT!!!
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