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Virtual centre tap resistors?

Discussion in 'Shock Brother's DIY Amps' started by Uncle Daddy, Apr 14, 2021.

  1. Uncle Daddy

    Uncle Daddy Tele-Afflicted

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    Never done a build with these before. Does it matter where they go in the heater wire chain? I was thinking of referencing them to ground at V1, pins 9 and 4. It's a bit crowded by the pilot light.
     
  2. Wyatt

    Wyatt Tele-Afflicted

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    That would be fine.

    BTW, on a cathode-biased amp, like a 5E3, some of us DC elevate the heaters by mounting the resistors on the power tube socket and grounding them to the tube cathode (pin 8 on a 6V6/6L6/etc.).

    Pretty sure this is on of @robrob's drawings...
    [​IMG]
     
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  3. Uncle Daddy

    Uncle Daddy Tele-Afflicted

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    Thanks. This is a Princeton Reverb so I could use pins 2 and 7 to a ground lug. I'd plans to use both pin 8s for a feed to some tests sockets, to ground via a 1r.

    P1130270.JPG
     
  4. King Fan

    King Fan Poster Extraordinaire Ad Free Member

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    Your lamp may be more crowded than mine, but this typical PR arrangement doesn’t take much space.

    94FE3A36-29BD-450B-82A0-9A11CDEFAA49.jpeg

    Ignore the tails on the heater wires — I just like to measure heater volts with mini-grip probes 'far from the madding sockets.'
     
    robrob likes this.
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