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  • power tranny?

    Hey guys, i'm looking to build a AX84 with some 20 watt trannys I have here. I have the Doberman single ended OT and I also have a 20watt power tranny which came out of a Jet City 20 . The schematic that I obtained from AX84.com website calls for a PT with a center tap. So my question to you guys is can I use the Jet City 20 watt tranny that doesn't have a center tap for this build?

    Chuck.

  • #2
    A center tap for the filament string or the high voltage?
    You don't need a center tap for either, actually.
    I have no idea what the voltage is across your Hi-V secondaries but, you would use the high voltage supply wires into a full wave bridge rectifier.
    And if it is the filament windings you are questioning, then a virtual center tap with a couple 100 ohm 1/2 watt resistors across the low voltage leads, (common point of the 100 ohms resistors grounded) is all you need.
    Last edited by Bruce / Mission Amps; 04-06-2012, 05:49 PM.
    Bruce

    Mission Amps
    Denver, CO. 80022
    www.missionamps.com
    303-955-2412

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