a cheap torroid...

[kato]

I have no idea if this is useful in any of our projects but it's cheap!

28v torroid, five bucks...

http://www.partsexpress.com/pe/showdetl.cfm?&DID=7&Partnumber=129-080

 

[radiance]

It's a steal alright! To bad I'm in Europe.....

 

[kato]

I bought one with no application in mind because I suspect it might come in handy one day...

[edit]removed cringeworthy newbish post 22 months later[/edit]

 

[Bauman]

man, now this is cheap!

 

[kato]

[quote author="rf"]

They should work for +15 / -15 supplies @ 1 amp pretty well.

[/quote]

I suppose it could be used on an API 312 clone then, eh?

 

[Svart]

ordered a bunch too!

 

[MikoKensington]

I just ordered 2 of the 14Vct and 2 of the 28Vct. I wonder what I'm going to do with them? :?

 

[Mark Burnley]

What a deal!

Hmm, 28-0-28 could yield a good PSU for some higher-voltage split rail goodies like Quad Eight??

:thumb:

Mark

 

[kato]

Have you looked closely at the output leads?
They say, "wonderful."

 

[Ptownkid]

How would i test these to find out whether or not they sent me the 14's instead of the 28's?

 

[kato]

[quote author="Ptownkid"]How would i test these to find out whether or not they sent me the 14's instead of the 28's?[/quote]

If you ordered part number 129-080 you got 28V.
If you ordered part number 129-082 you got 14V.

Separate links:
http://www.partsexpress.com/pe/showdetl.cfm?&DID=7&Partnumber=129-080
http://www.partsexpress.com/pe/showdetl.cfm?&DID=7&Partnumber=129-082

 

[MikoKensington]

What is the color coding on the leads? Anyone?

 

[Ptownkid]

Yeah, but i read another post about the wrong ones being sent. I ordered the 28's, but would like to verify.

Miko - 2 black, 2 red, 2 orange, the orange and red wires are on a 4 pin connector.

Cheers, and I'm still wondering how to test these

 

[MikoKensington]

Yeah I know the colors. But what's primary and what's secondary?

 

[alk509]

[quote author="MikoKensington"]what's primary and what's secondary?[/quote]

Measure the resistance between all the leads... whatever gives a less-than-infinity resistance reading is part of the same winding. Then, since it's a step-down transformer, the leads with the highest resistance reading are the primary.

Peace,
Al.

 

[Ptownkid]

[quote author="MikoKensington"]Yeah I know the colors. But what's primary and what's secondary?[/quote]

I realised that a couple minutes later...

 

[Ptownkid]

I'd still really like to know how to test these....

Is no one willing to help on this? Or is it really complicated?

 

[Ptownkid]

awesome, thanks

 

[fum]

[quote author="rf"][quote author="Ptownkid"]I'd still really like to know how to test these....

Is no one willing to help on this? Or is it really complicated?[/quote]

It's not complicated at all...

What I did: Cut the plug off of the secondaries. Strip the 4 wires and arrange them so they cannot touch.

Connect 120vac to the primary (Black-Black) and measure the voltage across each secondary (Red-Red or Org-Org)

The 28 vct model will put out around 15.6 vac on each secondary with no load.

To load test: Put a 10 ohm 25 watt resistor across one secondary for a 1.5 amp load and measure the voltage across that winding. Mine put out 14.87vac at 1.5 amps.[/quote]

I'm glad I didn't want to use that plug anyway, I just did the same to figure out what was what on the secondary side. Shoulda read here first :grin:

 

[ikiru]

Would this work with the new green pre power supply? Seem like it might be a strech? Power transformer ratings constantly confuse me!


http://1176neve.tripod.com/id26.html

I'm planning on running 4 preamps off the supply.
Sorry, I'm a clueless newb.

Jay