[sdiy] best ways of portable +/- supply

[KA4HJH]

>Spice says its about 15V... assuming that the 13.5VAC was an RMS value.
>
>The two linear regulators is an old cheap trick. I don't like it
>personally but
>it looks like an old design and negative regulators might have been harder
>to get.

Yeah, this circuit is from the mid-eighties and it was sold as a kit so
corners were cut. I've heard that those low power TO-92 regulators weren't
the most reliable, either. I seem to recall blowing a couple.

>Terry says he used a negative regulator and it worked...

I just pulled it out to look but the AC supply board isn't there. I'm not
sure what happened to it. It did work at the time.

-- 

Terry Bowman, KA4HJH
"The Mac Doctor"