Electronics toroidal transformer

[the snooper]

Evening chaps anyone know of a supplier for a 240 primary 20-0-20 plus 12-0 15va secondary toroidal transformer

Thanks

 

[brightspark]

got some big 240 to 12 volt transformers

 

[the snooper]

got some big 240 to 12 volt transformers

It's for a mixer and space is limited it's it's originally 2x115 v primary switchable voltage but the primarys have gone

 

[Pete.]

I might have one let me check...

EDIT: All I got is these two.

 

[Agroshield]

There are people who can custom wind toroids for you. Try Airlink Transformers. Try RS or Farnell for off the shelf as their search engines work parametrically.

 

[the snooper]

I might have one let me check...

EDIT: All I got is these two.

View attachment 214596
View attachment 214597

They are like hen's teeth thanks for looks

 

[the snooper]

There are people who can custom wind toroids for you. Try Airlink Transformers. Try RS or Farnell for off the shelf as their search engines work parametrically.

Good link, don't have one but will enquire if it comes to it, thanks

 

[Wedg1e]

Have a shufty on Ebay for Armstrong 600-series amplifiers, they use a toroidal with about that sort of voltage secondary; you can pick them up for buttons (probably cheaper than a new trx would cost!).

 

[voipio]

http://www.cambridgetransformers.co.uk/ will wind to order.

 

[500e]

Have a couple of 0-20volt toroids if any good you can have for postage + a donation to air amb
Came out of Phillips talk through base stations that were scrapped

 

[the snooper]

Have a couple of 0-20volt toroids if any good you can have for postage + a donation to air amb
Came out of Phillips talk through base stations that were scrapped

Thanks are the centre tapped or just 0-20 also need to be 15 VA

 

[500e]

Have 4 of them 1 is made by St.Ives transformers now Carnhill toroidal it is marked VT30814

 

[the snooper]

View attachment 214887 View attachment 214888
Have 4 of them 1 is made by St.Ives transformers now Carnhill toroidal it is marked VT30814

Thanks for the offer and uploading the picture much appreciated, unfortunately not what I need, I need centre tapped

 

[ajlelectronics]

Bear in mind that apart from the space required, you can use two transformers to give you a centre tapped output. I have a similar issue needing 12V negative and positive rails. What I have with a CT transformer is not good enough*, so have gone for a pair of 12V bare board SMPS which I will strap in series together and go straight to DC.

*Massive RFI issue which is a bit of a head scratcher.

 

[the snooper]

Bear in mind that apart from the space required, you can use two transformers to give you a centre tapped output. I have a similar issue needing 12V negative and positive rails. What I have with a CT transformer is not good enough*, so have gone for a pair of 12V bare board SMPS which I will strap in series together and go straight to DC.

*Massive RFI issue which is a bit of a head scratcher.

Yeah I knew that but as you can see in the picture space is tight, the removed transformer is sat on the larger one and fits into the space where you see the vent

 

[ajlelectronics]

What sort of DC current is required? Those power supplies I ordered are 1.5A, but there are 2.5A versions. The boards are tiny, much smaller than the transformer.

 

[the snooper]

What sort of DC current is required? Those power supplies I ordered are 1.5A, but there are 2.5A versions. The boards are tiny, much smaller than the transformer.

It's a 15va transformer with 20-0-20 & 12-0

 

[ajlelectronics]

It's a 15va transformer with 20-0-20 & 12-0

What does that turn into, on the DC rails?

 

[the snooper]

What does that turn into, on the DC rails?

Not sure only just got this not looked that far other then one of the 115 primary coils are open circuit

 

[ajlelectronics]

The other option is to run it from a 110V transformer on the remaining winding