SSL 4048G - PSU Repair - CF82E98 board - replacing obsolete OEP K3020E

[Di_Sousa]

Hi,

We need to replace some dead OEP K3020E transformers in CF82E98 boards of our G series PSU.

OEP doesn't produce this transformer anymore.

I searched all over RS components, farnell, mouser and digikey and can't seem to find a similar or replacement transformer.

At the moment, we cant turn the Console on, and unfortunately we had to cancel the sessions at the studio.

The transformer is a PCB mounting time, encapsulated in black plastic
Rated at 1,2VA

Primary is 240v - 0v
Secondary is  20v-0v-20v

(dimensions in the picture attached)

if someone knows a suitable replacement for this transformer please let us know,
thank you so much for your help

T

 

[Di_Sousa]

The transformer looks like this one on a CF82E98 board, although this one is not an OEP.

 

[Walrus]

Have you tried asking over at http://forum.sslmixed.com/index.php

 

[Di_Sousa]

Have you tried asking over at http://forum.sslmixed.com/index.php

Hi Walrus, thanks. I didnt know about that Site.
Going to register

Best regards

Tiago

 

[Di_Sousa]

Here is the picture of the transformer in question

 

[Di_Sousa]

side pic

 

[Walrus]

Also try Recycled Audio  http://www.recycledaudio.co.uk/

 

[Di_Sousa]

Also try Recycled Audio  http://www.recycledaudio.co.uk/

Thanks Kevin,
sent email some days ago but still didnt receive any reply from them.

 

[pucho812]

seems fairly standard of a transformer, any luck in finding the equivalent

 

[PRR]

Finding that exact size and pins will be difficult.

But 1.2KVA 20-0-20 torroids are modestly common. Nail it to the wall and solder the leads into your PCB.

Not "encapsulated", but apparently the encapsulation didn't make it live forever; anyway a bodge beats throwing clients out.

 

[gyraf]

That secondary pin layout is not common anymore - these days they're most often laid out with split secondaries for optional parallel/series work.

Something like the Block transformers, e.g.  Reichelt Item-No.: EI 30/10,5 218 - 230:2x18V, 2x28mA - http://www.reichelt.com/Transformers-PCB-2-0-2-8-VA/2/index.html?&ACTION=2&LA=2&GROUPID=3314 - may work, if you drill two new holes in the PCB for the center tap. These are available in several standard sizes/V/VA's - but no 20V. 230:18 is probably the closest to 240:20 - check with your design what you actually need

Check the pdf at reichelt to verify pin spacings for various types.

Jakob E.

 

[Di_Sousa]

That secondary pin layout is not common anymore - these days they're most often laid out with split secondaries for optional parallel/series work.

Something like the Block transformers, e.g.  Reichelt Item-No.: EI 30/10,5 218 - 230:2x18V, 2x28mA - http://www.reichelt.com/Transformers-PCB-2-0-2-8-VA/2/index.html?&ACTION=2&LA=2&GROUPID=3314 - may work, if you drill two new holes in the PCB for the center tap. These are available in several standard sizes/V/VA's - but no 20V. 230:18 is probably the closest to 240:20 - check with your design what you actually need

Check the pdf at reichelt to verify pin spacings for various types.

Jakob E.

Hi Jakob,
the pin-out difference is exactly the problem I was having, no worries I modify it to work with the different pinout on the secondaries ov.

I seems that on this Board you dont really neev to have a 20v transformer, it could be anything from 12v, 15v or 18v  to 20v as long as the 12 Volt regulated supplies do not fall out of regulation.

I ordered this transformer:

http://uk.farnell.com/block/vb1-5-2-18/transformer-1-5va-2-x-18v/dp/1131626?Ntt=1131626

Thanks so much for your help

Tiago