9 Jun
2020
9 Jun
'20
2:36 p.m.
On 6/9/20 2:10 PM, Josh Dersch via cctalk wrote:
On Tue, Jun 9, 2020 at 7:44 AM Jon Elson <elson at
pico-systems.com> wrote:
Thanks Jon (and everyone else). Yes, this is a
ferroresonant transformer
(w/matching motor-run cap), I'd just never heard one in a DEC machine that
was so very loud. I'll see if there's anything that needs to be screwed
down a bit more.
Well, humming isn't always bad--I'd like my transformers to be able to
hum "Coro a bocca chiusa" from Madame Butterfly... :)
Ferroresonant supplies do work, but make ugliness on the AC line.
Cheers,
Chuck