Replacing failed powersupplies on qbus PDP-11s
ard at p850ug1.demon.co.uk
Sat Jan 31 12:51:37 CST 2009
> On 30 Jan 2009 at 16:41, Roy J. Tellason wrote:
> > Eh? Why would it do that?
> Read about it:
> Interestingly, the real-world example cited is the addition of an=20
> input filter to a PDP 11/40...
Which would be curious if true, since no standard PDP11/40 used an SMPSU.
Switching _regulators_, sure, but the PSU starts with a large
mains-frequency transofrmer, which is not going to have much of an HF
Howev,er I read the article as that the author had run some simulation
software on an 11/40 to study the preformace of another PSU. And that
makes a lot mroe sense.
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