Need help with Oktava M 219 microphone

Discussion in 'General Electronics Chat' started by MarkusBass, Aug 27, 2011.

  1. MarkusBass

    Thread Starter New Member

    Jul 31, 2010
    I need help with Oktava M219 microphone. I got it with information that it was switched on when phantom power was already turned on (and it failed). I thought that the FET failed so I replaced it but the mic still does not work. So I started checking it and found out that there is a problem with power supply. I checked that if I disconnect the transformer, the premp starts working (using external power supply). It seems that the transformer is somehow shorted internally. With transformer connected the power supply voltage drops to 1.6V only. I checked that there is not short circuit in the preamp (if I disconnect the transformer).Does anyone has internal wiring of the transformer? Is it possible to buy it as a spare part?