• Hello.
    I just finished my G3 amp. But I haven't measured AC tension from the brown wires of the power transformer, but I had 6.5 AC tension on the red wires.

    I removed the brown wires of the power transformer from the circuit (BR1) and measured the AC voltage between the two brown wires with power on and the voltage was 0V
    I measured the resistance between the two brown wires of the power transformer. It was very high.
    Is my power transformer broken?

    thaks.

  • Hi,
    i think the transformer is brocken, between the brown wires must be 208 V AC.
    Kontakt Klaus from Musikding.
    Dieter

    A15MKII und M15MKI wechselbar im Combogehäuse Eminence Canabis Rex 12". G3 Blues / Rock / Jazz mit Jensen 10" CH 35 8 Ohm als Mini Combo Wechselgehäuse, Roland Cube XL40 mit Eminence Copperhead, Anvil, TT Tube Reverb, Vox AC10 1:1 Clone mit Reverb Addon und Celestion G10 Gold, Hagstrom 310 Clone mit Jensen P10R, Bluguitar Amp1 mit Remote und FatCab.

  • If you say "1300 KOhm" do you mean 1.3 MOhm? If this is the case and you don't have no reasonable AC voltage at these wires when connecting the primary to 230V it seems the power transformer is indeed broken and you should contact Klaus at Musikding to get it replaced. What about the heater voltage, which voltage do you measure?

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