Hardware Hobbyists vs. Emulator Jockeys
ard at p850ug1.demon.co.uk
Fri Jun 19 13:59:09 CDT 2009
> > Whatever have you done to it? AFAIK the 11/70 has switching
> > regulators as
> > standard (my 11/45 certainly does). Not the normal design of SMPSU (in
> > that there's a big mains-frequency trasnformer on the input), but
> > it's a
> > switcher none-the-less.
> Yes...Huge transformer, big bridge rectifiers, LM723, big series
> pass transistors...that says "linear" to me. :) I've never gotten
But 'big series inductor and flyback diode' says 'switcher' to me...
> deeply enough into the circuit I guess. I've been a DEChead all my
> life, but still I learn something new from you guys every day!!
I had to understand the cirucit after one of my -15V regulators almost
literally exploded when I was debugging it. I made the silly mistake of
disabling the overcurrent trip (lifted the collector of the sense
transsitor), not realising the crowbar was firing. The result was
transistors blown apart, a dead 723 -- and a blown fuse. Yes, I did get
it going again (and even found out why the crowbar was firing).
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