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Ampotor, need help
Posted: 16 Apr 2011, 11:34
by 7dust
Hi folks,
I just finish Ampotor from TONEPAD, i'm testing it sound's great very good clean sound, and when i connect to the DC jack it works fine, true-bypass works fine also, the problem when i use 9v batery it doesn´t work.. I also use tonepad offboard wiring nº 5..
Any help would be great, thanks
Re: Ampotor, need help
Posted: 16 Apr 2011, 11:53
by mysticwhiskey
Got a photo of your DC jack / battery wiring? Check that the correct pins have been wired to the battery. Also, make sure you're using a known good 9V battery - that's caught me out before
Re: Ampotor, need help
Posted: 16 Apr 2011, 12:00
by mysticwhiskey
Also, what DC jack are you using? Got a multimeter? Check the continuity between the battery snap terminals and the end of the wires to see if there's a break there.
Re: Ampotor, need help
Posted: 16 Apr 2011, 12:21
by 7dust
Hi thanks
I check continuity between bat and terminal, i also use the multimeter, i notice that i have on DC JAck, 9,50 volts i saw connection betwen jack ( red bat) to tip of Stereo Jack.
Re: Ampotor, need help
Posted: 16 Apr 2011, 12:37
by 7dust
But the red of DC jack ( 9 Bat ) and the sleeve of jack stereo is 0 volts.. with 3 pdt on and off
i just ceck that the DC jack (9 bat ) and the tip stereo as 9,5 volts.. with 3PDT on and OFF
Re: Ampotor, need help
Posted: 16 Apr 2011, 12:42
by 7dust
Re: Ampotor, need help
Posted: 16 Apr 2011, 12:50
by 7dust
Hummm, when i plug power on jack dc i get 9,05 on circuit and 9,05 on ground of circuit,
when i use bat i get 9,50 on circuit i have 0 volts on circuit, i think the problem is the DC JACK... that works with power and not work with battery 9v
Re: Ampotor, need help
Posted: 16 Apr 2011, 13:14
by mysticwhiskey
Are you using a metal enclosure? If so, those DC jacks will ground the power connector's barrel to the chassis. If you're using a negative-center power supply then that will cause problems. If you're using a center-positive supply then that will work, but you need to make sure you're wiring up the terminals correctly.
Edit: Just noticed you said you've got +ve voltage on the ground. You're better off buying a different type of DC jack. Get one that's isolated from the chassis (get a plastic one). Then you can wire it up like this:
This wiring diagram applies to negative-center power supplies, and with these types of DC jacks:
http://www.pedalpartsaustralia.com/imag ... C_jack.jpg
Re: Ampotor, need help
Posted: 16 Apr 2011, 14:00
by 7dust
Grateful Thanks,
Yes, my enclosure is metal, and the problem is the metal dc jack is not isolated...
I'll try difent dc jack...
Re: Ampotor, need help
Posted: 22 Apr 2011, 11:25
by 7dust
Hi finally the battery problem is resolved, the problem was that i was used mono input jack, and i change it to a stereo jack and it work well..
thanks, hope