Two 9VAC 2.1A power supplies, what to do, what to do...

[Hailstorm350]

Any suggestions on what to do with these rather expensive transformers I have in my posession.  They used to be part of power adaptors to my Digitech GNX2 processor, but unfortunately they both broke, and the other one was on order and is now waiting for me at the shop.  I cut one open and discovered that the transformer itsself was not blown, but there is an internal fuse that blew when my friend plugged it into his MT-2.  So I have these quite large and possibly very useful transformers that I have laying around here.

Please someone tell me what I can do with these beauties.

Some options I came up with myself were:
power supply:  I don't know how I would adapt these so that the 9VAC converts into DC.  Possibly there would be extra potential amperage once converted over?

well that's the only idea I came up with... lol

maybe for some kind of talk box... ooh anyone know of any good models I could buy or possibly make?  the eagles farewell concert got me so inspired that I found rocky mountain way and learned how to play it.  The only thing I lack is a talkbox.

Enough of my ramblings...

Thanks for your suggestions,
Ken

[niftydog]

If it is 9VAC RMS then you have a great transformer for a 9VDC power supply. The amount of current on tap is largely dependent on the components you add to make it into a DC supply. Usually folks around here use 78XX series regulators, which are capable of 1A, but only when well heatsinked.

Plenty of info around on doing this, have a quick search or just jump straight to geofex.com.

Can you not replace the fuse?

[toneman]

if all the windings on the xfmr are separate, U can make each into an independent,
and, most importantly!!, each into an isolated power supply.  (Only)Then U can "stack-em".
**Windings *must* B separate from each other**
2 make +18 from 2 *isolated" 9V power supplies, *one* of the Pos goes to *one* of the neg.
Now U have 2 pwrsupply *in series*..the *loose* neg will B ZeroV and the "loose" pos will
B +18V. ......i'm assuming DC volts.
Read-reread the pwr supply article at R.G's site....4sure.
Your picture, at first, looked like U would directly *short out* 2 windings(?)
stayisolated(B carefull)
tone

[Hailstorm350]

the fuse is soldered onto the board, I suppose I could do it, but I looked at it and couldn't find any ratings or types.  It would be pointless to try to fix it though, because the damn thing is hermetically sealed and so instead of allowing us customers to go find a common fuse, pay 50 cents and continue to use their wonderful product, the company has to make another 50 bucks at least half of which is probably profit margin.

Commercial for DIYSTOMPBOXES.COM
Real customer:
I really hate large corporations who like to take advantage of smaller people That's just One of the joys of making your own DIY stompboxes.
there's no stress or hassle when it comes to purchasing your next piece of gear.  Just assemble and play!

I should make that my signature lol
oh well,
Thanks
Ken

[Hailstorm350]

Tone:
They're two separate power supplies because one broke then the other did too.
and are you sure you posted on the right topic? lol it looks like you might be talking about someone else's post, but only slightly lol.

so the Xfmrs are separate, that makes them isolated right? lol I know what isolated is, but I thought I made it clear that there was only one winding per transformer, and that the two transformers were completely separate.

oh well,
Ken

[toneman]

oops, miss it.
if both fuses, in each *separate* xfmr are blown, it doesn't mean that the xfmrs are both bad.   if U can lift one wire of the secondary, then(safely) plug it in again, and read the
*AC*  voltage from the secondary,  (if the (new) fuse doesn't blow again.
If U get a ACV, then it's a bad diode or cap in the AC-2-DC converter.
If the (temp)(new) fuse blows still, U probably have an internal short.
In short(pun) U have a door stop, paper weight, etc.
sorry 4 my oops..

T