finding correct regulator IC

[Martin Brown]

Oh joy :( Are they related to dingoes kidneys?

regulator in that circuit I wonder ?

miniature PCB size ones, so it must have been in the external psu. The interpretation of what -15v is probably a bit flexible so could be as high as

-15sqr(2). Can't find LM7809's, even on eBay, except from China so it's got to be an LM7812.

Might be a good idea to put something like 2000uF across the input then and replace or install the bypass small decoupling capacitors around the

7815 as was discussed elsewhere in this thread.

You can buy any generic 7815 it doesn't have to be the old LM78xx part.

ISTR Rapid will even sell one off. Delivery will sting a bit tho.

Maplin will sell you one for about a quid collect in store.

[John Williamson]

regulator in that circuit I wonder ?

miniature PCB size ones, so it must have been in the external psu. The interpretation of what -15v is probably a bit flexible so could be as high as

-15sqr(2). Can't find LM7809's, even on eBay, except from China so it's got to be an LM7812.

LM317 adjustable regulator in the TO3 or TO220 case, and use a couple of resisitors to set the voltage. Buy a couple, they're cheap enough. They're also almost indestructible. I know, I've tried....

[meow2222]

easily traced to a defunct regulator IC which isn't passing on any volts and everything more less works if it's bypassed.

the right one as its data sheet specifies a minimum input volts of 17.9 but the mixer's external psu socket says only 15v.

volts input 12v output, or a LM7805, 7.5-20v input, 5 volts output.

...8><

Ac output warts do exist, but theyre not popular. 15vdc in is a lot more likely. The question can be settled by looking for a bridge rectifier on the input.

Since it has a reg onboard it seems the wart was unregulated. With 2.5v min Vdrop, 7812 looks the most likely candidate.

NT