GGG regulated Power Supply Project

[HeaD]

Hi, I have built this project following this schematics:

http://www.generalguitargadgets.com/pdf/ggg_reg_power_supply.pdf

It works, but after some seconds it overheats. I have put a fan.....

.....but it's useless! After a few minuts it still overheats and it smells of burned stuff. What can it be?

Thanks to all!

[BDuguay]

No need to apologize for your english, it's fine!
Does the power supply still work even though it's heating up?
B.

[Bernardduur]

Do you have the transformer wired for 110 or 220 volts?

[HeaD]

Do you have the transformer wired for 110 or 220 volts?

Oh my god... this is the problem!!!!   I had forgotten that in the USA voltage is different.... Thanks again...

[Bernardduur]

LOL

[soggybag]

While we're on the subject. I  was thinking about building this power supply and I wanted to put it in a smallish box. Should I take precaution in the placement of the DC power output jacks? Should these stay away from the transformer? Can I mount them right above the transformer?

[dv8]

soggybag:
I built mine in a Hammond 1590 S, which is a little taller than a 1590 BB.  And put 4-9v outputs at one end and the transformer at the other end.  It was a tight squeeze.  But I also put a AC jack too, the power cable is a computer type cable.  AC input jack was rescued from an old pc power supply.  That way you can always find a power cable.  I used the pcb from GGG.

[PharaohAmps]

I build a similar power supply into the "Wild Mouse" size box from Small Bear.  I use the 400mA 6-0-6 transformer from Radio Shack, and 4 of the plastic DC jacks.  My board design is a little different than JD's, but his board will work fine and is even a little smaller than mine.



Interesting design note:  JD's board calls for an LM317, which is a nice part.  If you don't need the adjustable voltage, then you can use his board layout for a 780x series three-terminal regulator.  My boards use an LM2940-10 regulator for a 10 volt supply, which is close to that of a fresh 9-volt.  When I used to use LM317's, I always set them up to put out 9.6 volts.

My personal pedalboard has a 3-output supply, 2 at 10VDC, and one at 12VAC.  Most of my pedals run on 1 of the 10V loops, with the other reserved for my Echo Park.  The 12V output runs some other junk including a tube-powered preamp and a Line6 modeler pedal.

Matt Farrow