5c1, 5c3, 5f1, 5e3 concurrent builds

Discussion in 'Shock Brother's DIY Amps' started by motor_city_tele, Jul 2, 2012.

  1. robrob

    robrob Poster Extraordinaire Ad Free Member

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    Doh! 5C3.
     
  2. Prophetsnake

    Prophetsnake Tele-Meister Silver Supporter

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    Super helpful thread!
     
  3. SoulstormTX

    SoulstormTX Tele-Meister

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    I'm new here and quite interested in building amps. This thread is awe inspiring. Keep up the good work.
     
  4. motor_city_tele

    motor_city_tele Tele-Afflicted

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    power tranny swap?
    The 5C3 started to misbehave. I can't say that it wasn't acting up from the very start though. Here is symptoms and there is question.

    Heat and Stink
    The PT got hot and started to give off that smell, even in standby mode. The 2amp fuse didn't blow. It was a cheap used PT from the get go so I'm not too concerned. I am going to replace with another used cheap PT close to the same specs maybe a bit beefier.

    My question
    The old PT did not have a center tap on the 6.3 volt heaters so I fabricated the artificial CT according to RobRob. The "new" PT has both CTs on the 5.0 and 6.3 heaters. Is it OK to just cap the two CTs and hook it up the same as before?

    EDIT:
    tried it like I said - nuthin'
    hmmmm I thought let me take some voltages
    HT= 398 DC to ground to each
    line = 121
    recto heaters = nuthin'
    other heaters = nuthin'

    Sommat must be up with the center taps.

    each center tap has 2 wires.
    I soldererd them together (individually) and tried again.- Bingo!
    5.2 volts at the recto heaters
    6.5 volts at the jewel terminals

    played for an hour or so - no stink.
     
    Last edited: Nov 29, 2017
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