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  1. A

    TA-15 - Channel 1 Amp Noise Issue (Sound Clip included)

    Hello everyone, I was busy these days. To return to the question of noise, I did the following tests: I used an external transformer (from an old Fender Twin Reverb) to supply the heaters. The noise remains the same. Also, putted a DC positive reference to heater and nothing changes. Then, I...
  2. A

    TA-15 - Channel 1 Amp Noise Issue (Sound Clip included)

    Sorry for the delay, I'm quite busy these days. I have some outcomes to share with you but I need a couple of days in order to compile the info. Andrés
  3. A

    TA-15 schematic

    Do you still need it?
  4. A

    TA-15 - Channel 1 Amp Noise Issue (Sound Clip included)

    Hi all, I know this is an old thread but I want to share my expirience with the TA-15. I bought it second hand and it had the same hum problem. Putted an osciloscope and I saw a 60Hz signal (actually 50Hz in my country), so I started with tube swapping ... The hum remained the same. Google-ing...
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