PT id help

[andy_wreck_fan]

Hey all,I'm new to the forum.

Found it while I was looking some info on building my own wreck.

I got all parts now,and just one problem,the guy who made my PT had put different color on wires so now I can't start build before I id them.

Here is what I got on paper with tranny

yellows = 230v
greens = 300v
blue= middle 0

fat whites = 2 x3,15v (7,5A)

Black marked Whites = merge together

there is 2 of each wire except blue

if any1 could help me ID this i would be so gratefull
it's my first amp build so I have soo much questions
maybe an comparison to some existing layout or such would be great

Andy

[dynaman]

Don't understand what this means - "Black marked Whites = merge together".

How many black and/or white wires do you have? Primary wound for only 120?

[M Fowler]

Black wire with white strip?

You need to contact the maker and get a wiring diagrahm for that PT.
When you discussed building the PT or the purchase of it the seller must have noted your requirements, now you need to ask which color wires are for what.

Black should be the primary 120, 220 or 240 taps could be available as well. Using yellow and greens as the secondary power source wires doesn't make sense to me.

[Structo]

I got all parts now,and just one problem,the guy who made my PT had put different color on wires so now I can't start build before I id them.
Andy

This is why he is having trouble.

Are you in the USA Andy?

[dynaman]

You indicated the two fat white wires as being 3.15 VAC. If each wire supplies 3.15V, there should be another wire (center tap for this winding).

The two white wires should actually read 6.3VAC if you connected them to a meter. If this is the case, you don't have to have to have a center tap - you can make your own with a couple of resistors. If the white wires only read 3.15VAC end-to-end, then you've a problem.

[andy_wreck_fan]

I live in Europe

Ok,so this is a small diagram I just made to show my transformer.
Instead of white wires I painted them brown on pictures.

[IMG:762:428]http://img.photobucket.com/albums/v515/ ... tranny.jpg[/img]
So,as I'm beginner in this,I actually need some1 to compare colors of this wires to ones on layout so I can connect them correctly

(exp: green's are actually red ones on layout I got here. Or greens are purple ones on ceriatone site layout)

[JamesHealey]

the two merged together are your centre tap for your 6.3v winding these go to earth.

The yellow 230v are + and - for your mains and goto the AC.


The 300 0 300 taps

0 goes to ground and the 300's goto the rectifier, these can be either way.

[andy_wreck_fan]

so now as I see it

browns goes to valves

greens go to diodes

two merged go together to ground along with blue (0)

and yellow ones go to power switch,i just need to find out which one is - and which one is +?

[FYL]

Ok,so this is a small diagram I just made to show my transformer.

Don't try to guess anything when it comes to power transformers. Take your multimer and check all of the windings before using the PT.

[andy_wreck_fan]

Ok,so this is a small diagram I just made to show my transformer.

Don't try to guess anything when it comes to power transformers. Take your multimer and check all of the windings before using the PT.

it is not guessing,it's what I have got with my transformer

just lookin for help to id where i need conect each of those wires

[FYL]

Check all windings with your multimeter, then you'll be able to draw a proper schemo and know what to do.

[Structo]

If this PT is a vertical one with two openings in the bell end covers, it is possible they didn't route the wires properly either.
So I echo FYL in suggesting first you check the resistance of each wire compared to the other.

There will be no resistance between the primaries and secondaries.

Then if you have a low ac voltage source like a adapter that puts out 9v or so, hook that up to your primary wires.
Now you can measure the voltage you get on your secondary wires.
The lowest voltage will be the 3.15v winding and the highest two will be the HT.

This will also let you figure out the turns ratio which is how a transformer works, by this ratio it steps up or down the voltage.

What I don't understand is the way you have it drawn.

You have 230vac mains where you live right?

Then those two should be the primary side.

You want the amp to see 300v right?

Those should be the secondary side.