Transformer Rewind

[Pommie]

And still no mention of frequency.

Mike.

 

[spike47]

And still no mention of frequency.

Mike.

I have no idea about what frequency it is ,the transformer is just fed via 230v a/c and the winding wire is just a secondary on it !.
Spike

 

[spike47]

230v 50Hz , UK house feed

 

[Pommie]

Is that the voltage going into the primary of the transformer or supplying the circuit?

Mike.

 

[spike47]

Is that the voltage going into the primary of the transformer or supplying the circuit?

Mike.

Yes , going into (fed) into the Primary winding !
Spike

 

[spike47]

Has per schematic

 

[Nigel Goodwin]

Don't see any mention of frequency in that post.

Mike.

No, none at all, he's also rather vague about what it's for - but I suspect it's actually a PAT tester.

Depending on type, size, and weight PAT testers use either a conventional mains transformer (mine does, and takes some lifting) or a small and light switch-mode transformer. From his post #19 (assuming that's the actual transformer) it suggests it's conventional, as it shows separate mains windings

If he posted a picture of the transformer, all would become clear.

 

[Nigel Goodwin]

Has per schematic

There is no schematic - simply a partial drawing of transformer windings. If the transformer iron cored, or ferrite? - is it big and heavy?.

 

[spike47]

No, none at all, he's also rather vague about what it's for - but I suspect it's actually a PAT tester.

Depending on type, size, and weight PAT testers use either a conventional mains transformer (mine does, and takes some lifting) or a small and light switch-mode transformer. From his post #19 (assuming that's the actual transformer) it suggests it's conventional, as it shows separate mains windings

If he posted a picture of the transformer, all would become clear.

It says what it is for at the top of the schematic !

 

[spike47]

Trany

 

[Nigel Goodwin]

You might have a look at the article in this magazine, which is somewhat simpler as regards the transformer.

https://worldradiohistory.com/UK/Television-Servicing-UK/00s/Television-2003-06-S-OCR.pdf

 

[spike47]

The problem with the Transformer is in the Primary winding, have had to take off a secondary winding ( the windind wire we are talking about ) to get at the Primary, all the secondary windings are fine, but since I removed that secondary winding I will have to replace with new wire as well has the Primary when I get it unwound .

Spike

 

[spike47]

ps: thanks for the nostalgic look back, interesting though.

cheers
Spike

 

[Nigel Goodwin]

The problem with the Transformer is in the Primary winding, have had to take off a secondary winding ( the windind wire we are talking about ) to get at the Primary, all the secondary windings are fine, but since I removed that secondary winding I will have to replace with new wire as well has the Primary when I get it unwound .

Spike

It's rather like pulling teeth - but presumably the core of the transformer (as you only posted a picture of the bobbin) is the conventional iron laminations?, E's and I's or whatever. The reason we're all trying to find out more is to confirm the transformer type - a switch-mode type is completely different, and used in smaller more modern PAT testers. In a switch-mode transformer it's likely to be important that Litz wire is used, in a conventional 50Hz there's not really any reason to use it.

LITZ WIRE

www.wires.co.uk

I'm presuming you can't source a transformer from the equipment manufacturer?.

 

[spike47]

It's rather like pulling teeth - but presumably the core of the transformer (as you only posted a picture of the bobbin) is the conventional iron laminations?, E's and I's or whatever. The reason we're all trying to find out more is to confirm the transformer type - a switch-mode type is completely different, and used in smaller more modern PAT testers. In a switch-mode transformer it's likely to be important that Litz wire is used, in a conventional 50Hz there's not really any reason to use it.

LITZ WIRE

www.wires.co.uk

I'm presuming you can't source a transformer .

I want to repair it, the cost of a transformer for it will be way to high a cost, I just need some copper wire !.
ps: You can see in one of the pics the laminate plates !.
cheers
Spike