Transformer part ID please

Adrian Graham witchy at
Sat Jan 21 17:33:21 CST 2017

On 21/01/2017 21:59, "Tony Duell" <ard.p850ug1 at> wrote:

> On Sat, Jan 21, 2017 at 8:43 PM, Adrian Graham
> <witchy at> wrote:
>> Hi folks,
>> Does anyone know what this is? It's obviously a transformer coil(s) but
>> image search and googling those markings produces nothing:
> I think the LA number is the number for the ferrite 'pot core' not the
> complete transformer.
> It looks to be part of a switching regulator circuit. Possibly to generate
> other voltages from the 5V line. Can you post a picture of more of the PCB
> around it.

Its second output goes via an IN4148 to the -24V regulator:

The top black wire is from the PSU and goes left-right (in pairs) GND, +5,
+12, -12. I'd do an underside pic too but the board's covered in analyser
wires at the mo.

The -24V regulator can be seen just above the 4 blue caps, The regulator
that can be seen under the black wire is a 7812. The LF351N has -12V present
at its bias outputs, the opamp to its right has no markings helpfully.


Binary Dinosaurs creator/curator - the UK's biggest private home computer

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