• 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.

Anyone ever use DC to heat rectifier tubes?

How do you heat?

  • AC every time

    Votes: 2 40.0%

  • Rectified and smoothed DC

    Votes: 0 0.0%

  • Rectified and Regulated DC

    Votes: 3 60.0%
  • Total voters
    5
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Lingwendil

Lingwendil

Member
Joined 2008
Hello, I have plenty of parts to use up, and was just wondering if anyone ever uses DC to heat rectifier tubes? I use a regulator to run 6.3VDC to run my EZ81 in my test supply, and noticed less hum in my circuits. Would you be able to do this in a 5AR4 style circuit if you kept the filament supply floating? I've got a pile of LM317T to use up and figured They'd be useful here.
 
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