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Author Topic: consequences of incorrect plate voltage  (Read 1005 times)

Brian Campbell

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consequences of incorrect plate voltage
« on: June 24, 2018, 05:39:26 pm »

What are the effects of incorrect B+/plate voltages with regards to frequency response?
Is there a general guideline of tolerances?


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Re: consequences of incorrect plate voltage
« Reply #1 on: June 24, 2018, 05:45:03 pm »

Plate and B+ voltages are not necessarily interrelated. Bad tubes will cause low plate voltages, even if B+ is correct.

On the other hand, extreme B+ variations-too much or too little- will cause capsule distortion or noise, because capsule polarization voltage is usually divided off the B+ supply voltage. Here, even just a few more volts deviating in either direction will cause audible artifacts.

None of this answers your question. I have not experienced frequency deviations, because the other effects of too litte or too much B+ and plate voltages are overwhelming.
Klaus Heyne
German MasterworksŪ
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