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...
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
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...