Search found 7 matches

by aavatech1
16 Sep 2020, 21:46
Forum: Pedal Debugging & Troubleshooting Support
Topic: Maestro PS-1A (Help!)
Replies: 11
Views: 773

Re: Maestro PS-1A (Help!)

Thanks for the clarification "G". I'm still looking for a small 12-0-12 transformer that will work so I don't have to modify this guy. A friend once told me "things can only be original once". So I go a long way in trying to keep things as original as possible. But hey, ya gotta do what ya gotta do ...
by aavatech1
12 Sep 2020, 02:24
Forum: Pedal Debugging & Troubleshooting Support
Topic: Maestro PS-1A (Help!)
Replies: 11
Views: 773

Re: Maestro PS-1A (Help!)

[The G] Thanks again for your input and info. I don't know why I didn't think about just removing some components from the circuit to isolate the unused components. Bench blindness maybe. Anyway thanks again for pointing out the obvious. : ) In regard to your statement "But the plug would be differe...
by aavatech1
09 Sep 2020, 19:07
Forum: Pedal Debugging & Troubleshooting Support
Topic: Maestro PS-1A (Help!)
Replies: 11
Views: 773

Re: Maestro PS-1A (Help!)

Thanks Fender3D, got it!
by aavatech1
08 Sep 2020, 18:26
Forum: Pedal Debugging & Troubleshooting Support
Topic: Maestro PS-1A (Help!)
Replies: 11
Views: 773

Re: Maestro PS-1A (Help!)

[Fender3D] unfortunately I'm not a the point where I can calculate how much wattage the power supply circuit will dissipate. I thought about it and I'm familiar with Ohm's power formula but don't know how to apply it in this case. I've looked around quite a bit but haven't landed on a transformer th...
by aavatech1
07 Sep 2020, 21:19
Forum: Pedal Debugging & Troubleshooting Support
Topic: Best practises for diagnosing volume loss?
Replies: 5
Views: 467

Re: Best practises for diagnosing volume loss?

There are "Signal generator" web page apps online that will provide you with pure audio tones, i.e. sign, square & triangle waves that you can insert into your pedal. If you have a spare mini-plug cable that you can solder a 1/4 in guitar plug onto you can use the generator to run a pure tone that'l...
by aavatech1
07 Sep 2020, 19:04
Forum: Pedal Debugging & Troubleshooting Support
Topic: Maestro PS-1A (Help!)
Replies: 11
Views: 773

Re: Maestro PS-1A (Help!)

Fender3D; thanks for the reply and the schematic! I think my phaser is like yours since it has the 1N759A 12V zeners. I had been looking at 12-0-12 transformers and most seem a bit bigger than the one I have here tho they are available. The higher the current the larger the transformer apparently. B...
by aavatech1
07 Sep 2020, 04:13
Forum: Pedal Debugging & Troubleshooting Support
Topic: Maestro PS-1A (Help!)
Replies: 11
Views: 773

Maestro PS-1A (Help!)

Greetings, I recently found a Maestro PS-1A phase shifter pedal and it definitely needs some love. I'm up to the task but I've got a couple of questions I was hoping some folks could chime in on. Firstly after opening this guy up I noticed that the transformer had been disconnected. The 4 of the 5 e...