[sdiy] OB8 power transformer

[Terry Bowman]

> On May 20, 2024, at 11:46 PM, Michael E Caloroso via Synth-diy <synth-diy at synth-diy.org> wrote:
> 
> And if the bridge rectifier fails with a short on one of the diodes, the fuse will blow before the transformer is damaged.  Unless the owner was an id10t and shorted the fuse.

I began and ended my electronic career repairing cable TV line extenders and their power supplies. There was one made by a famous company that was a good design and easy to work on. There was just one slight problem: the fuse was after the bridge rectifier. This led to lots of fried transformers. These things run off of 60V square wave AC so it was a special transformer that was quite expensive.

At this time in the early to mid '80s surge protection was uncommon. We made our own little crowbar devices in-house and installed them on everything that was given a full one year warranty. One day we got a phone call from an engineer at the company asking us why the stuff we repaired didn't burn up as often.


Terry Bowman, KA4HJH
"The Mac Doctor"

https://www.astarcloseup.com

"If only you could see what I've seen with your eyes."—Roy Batty, Blade Runner

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