Search found 4 matches

by andresbianco
Mon Aug 14, 2017 9:25 pm
Forum: Atlantic Series
Topic: TA-15 - Channel 1 Amp Noise Issue (Sound Clip included)
Replies: 12
Views: 9605

Re: 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 did the...
by andresbianco
Mon Aug 07, 2017 7:13 am
Forum: Atlantic Series
Topic: TA-15 - Channel 1 Amp Noise Issue (Sound Clip included)
Replies: 12
Views: 9605

Re: 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
by andresbianco
Tue Jul 25, 2017 12:37 pm
Forum: Atlantic Series
Topic: TA-15 schematic
Replies: 3
Views: 4114

Re: TA-15 schematic

Do you still need it?
by andresbianco
Tue Jul 25, 2017 10:13 am
Forum: Atlantic Series
Topic: TA-15 - Channel 1 Amp Noise Issue (Sound Clip included)
Replies: 12
Views: 9605

Re: 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 I saw...