help me with my power supply

[BJoe9]

hello guys, i used this schematic to build a 9VDC power supply, I breadboarded all the components for this and all the reference measurements are correct. The problem is when I tried to run my TS-9 pedal   off this 9 volt supply, it didn't work. Now, my TS-9 doesn't work using a regular 9 volt wall adapter, but it still works using a 9v battery.

Is my power supply putting out too much current or is my voltage too high to run a TS-9. The DC measurement for the supply was 9.60 volts DC. The only components that I change from the schematiics was the 1N4002 diodes, I used 1N4007 instead, do you think that could be the problem. PLEASE HELP ME! Thanks

 http://www.generalguitargadgets.com/index.php?option=content&task=view&id=77&Itemid=106

[toneman]

the article U refer 2 is fixed  DC supply using an adjustable regulator(317).
got DC (unregulated)  going in??
do U measure 9VDC at the output??
check all the gnds.
the 317's adj pin should B "above" gnd approx 7.5V.
do U have the right sized plug??
some plugs have the same outside diameter,
but the inner hole is too large, and won't connect correctly.
Also, do U have the polarity of the plug correct.
Some pedals have center POS, others have center NEG.
these are only first thought suggestions/questions.
remote troubleshooting is very difficult.
wish there was a way......
staypowered
tone

[niftydog]

Now, my TS-9 doesn't work using a regular 9 volt wall adapter, but it still works using a 9v battery.

does the ts9 have reverse polarity protection? Possible that's gone south.

check the polarity of your power supply connectors.

Was the ts9 definately working on the "regular 9 volt wall adapter" before you plugged in your supply?

Is my power supply putting out too much current

No, it doesn't work that way. Revisit ohms law. Current entirely depends on voltage and resistance, you cannot force more current into a circuit that what it wants.

or is my voltage too high to run a TS-9.

it could be the other way around, too little voltage. Some of my older boss pedals require 9VDC unregulated (read; 11-12VDC) to work properly.

I used 1N4007 instead, do you think that could be the problem.

nope.

plug polarity is the likely culprit.

[BJoe9]

Some pedals have center POS, others have center NEG

how do I tell if my pedal is center pos or center neg.

[BJoe9]

bump

[Mike Burgundy]

practically ALL commercial pedals have negative core, positive sleeve DC connectors. Don't ask me why.
Just hook up a mulitmeter (no battery in circuit) to an inserted DC jack, and see which one goes to ground - that's your minus. If this is an Ibanez TS, it will surely be the inner pin that connects to ground. Measure to be sure.

[BJoe9]

I never knew that most commercial pedals have a NEG core. I just assumed that the inside pin was POSITIVE.

When I was connecting the end connection for my breadboarded power supply, I connected the POSITIVE to the inside pin and the GROUND to the outer part. In the case of my TS-9, I must have reversed the polarity on external power connection.

If I switch these wires around, do you think that should solve my problem?

[toneman]

if the pedal has a "polarity protector" diode, U R saved...
praise the diode!!
if not, check the opamp.

[guavatone]

This may be a shot in the dark.

Test electrolytics in your TS9 with a DVM.  If cap is bad you will get continuity.  if its good it will get continuity for a moment then no continuity.

[Mike Burgundy]

check if the pin or the sleeve is connected to ground. If it's the pin, the pin should be negative. If you haven't damaged anything, the pedal should now work. Otherwise, suspect the opamp (check for voltage on the otput pins, perhaps, audio probe, or just replace), protection diode if any and electrolytics, in that order.

[BJoe9]

Hey everyone, I want to say thanks for all your help. It turns out the problem was me assuming that the center pin was POSITIVE instead of NEGATIVE. So with that, I reversed the wires and everything is working fine, including the TS-9, I guess it did have a reversed diode installed.

Anyways, just wrote in to let everyone that helped me know that the power supply in working great, thanks for everyones help!