Power Tran' Wire help needed.

[Shawnobi]

Could anybody assist me in wiring my transformer? I've built everything else only to be perplexed by it.

It's an after market Power tran' suitable for a Princetown (UK Spec) and should conform to Fender colours I'm told.
It's supplying a 5Y3 rectifier, 6.3V heaters as well as the rest of the amp.
Dangling out the bottom are the following wires!:
2 x Red
2 x Green
2x Yellow
1x Green/Yellow
1x Orange
1x Blue
1x Black

I'm guessing the brown and black are the 230V input and the green/yellow is a safety earth?
If anyone could help identifying the rest I'd be greatful.

Thank you.

[Jazz P Bass]

Who is the manufacturer?
They should have a schematic for the wire colors, no?

My take:
Red/ Red = B+ (there should be a center tap, no?)
Green/ Green Yellow (center tap) Green = 6.3Vac heaters
Yellow/ Yellow 5vac (tube rectifier)

No clue on the Orange , Brown & Black.
I would try to decifer if one of them is the center tap for the Red/Red.
That would leave Mains input.

[Shawnobi]

Sorry, should have been Blue not Brown. Have edited O/P

I'm thinking that:
Black & Blue = 230VAC Input
Yellow & Yellow = Pins 2 & 8 (5Y3)
Red & Red = Pins 4 & 6 (5Y3)
Green & Green = Heaters

Which leaves the Orange and the Green/White. Poss centre taps that I should tie to ground?

[Justin Thomas]

I'd use my meter to check which wires are connected to which... you may have either a primary for 120,
OR 240, or you might have a bias tap, or a shield... find out what's connected to what. And, as Jazz said, try to get the manufacturer's info on it. But DON'T GUESS unless you have no other choice!

Justin

[Shawnobi]

I've got the following from the guy who made it (Custom job)

240V blue and brown
HT winding red-orange-red
Heater green-green/yellow-green
Rectifier yellow-yellow

So I guess the green/yellow & the Orange are centre taps to be tied to ground?

[Justin Thomas]

I think it's safe to assume the green/yellow is tye 6V CT. Orange could be. Verify the unknowns.

Justin

Edit: missed mentionnof orange from manufacturer in post 5... sorry!

[eschertron]

From post #5 it seems that
red = HV
orange = HV CT
red = HV

green = HTR (6.3v)
grn/yel = HTR CT
green = HTR

yel = HTR (5v)
yel = HTR

So yes, the CT wires should go to ground (or wherever the schem says to go!)

to be sure:
use Ohmmeter to ring out the wires. The HV set will have a few 10s or 100s of Ohms, and the CT should be easy to identify from it's resistance to the other wires. Not so with the heaters, both the heater sets will be close to continuity (but isolated from anything else), so you'll detect the sets but not *necessarily* which wire is the 6.3v CT unless you have a really good meter.

to be double sure:
tape off all the leads (individually!), apply power to the primary, and carefully access pairs of wires to read the voltages. You probably don't need to do this since the Tranny's maker has given you the colors. But I'd do that to a completely unknown device.

[Shawnobi]

Thanks guys, much appreciated.