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Old 16th December 2015, 09:54 AM   #1
kaputt is offline kaputt  Germany
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Default "rejuvenate" oxide cathode

Hi! I pulled a Taylor 866 from my stash and noticed at heating up that the cathode was only glowing properly at the ends ands was darker in the center. I then hooked the heater up to a benchtop PSU and saw it only draws 3.8A. Usually they draw around 4.6A (datasheet states 5A).
Leaving it heated didn't change much.
Is there a way to get the resistance of the filament down or is that one done for?
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Old 16th December 2015, 10:08 AM   #2
DF96 is offline DF96  England
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I think all you can do is boost the heater voltage by a little, but that will only be a short term measure.
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Old 16th December 2015, 10:35 AM   #3
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May be a silly question but is the heater voltage correct?
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Old 16th December 2015, 11:21 AM   #4
kaputt is offline kaputt  Germany
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Hi Jon, heater voltage was correct.
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