Re: [AH] Looking for an OB-8, OB-SX, or OB-XA power transformer

From Florian Anwander
Sent Wed, Sep 26th 2018, 08:40

Hello

Am 26.09.18 um 10:20 schrieb Oakley Sound via analogue:
> I replaced my dead transformer in my OB-Sx with two toroids, one for 
> the +/-15V and one for the +/-5V. Fitted nicely (in the OB-Sx) and 
> doesn't hum like the original used to do.
>
I do it usually the same way as Tony does.
But recently I tried to go the way Doepfer goes with their A100-PSU3: 
Use a switching powersupply with higher voltage output and then add a 
linear regulator. I needed +12/-12/+5, so I used a traco TMP30515 and 
added the usual 78xx/79xx regulators for the 12V lines. It works like 
charm and requires less space than two torroidal transformers.

But I have to admit, that I don't know whether suitable switching 
powersupplies for voltages over 15V exist.

Florian