[rescue] Need VME memory boards

Sandwich Maker adh at an.bradford.ma.us
Tue Mar 26 17:18:56 CDT 2019

" From: Robert Toegel <rjtoegel at gmail.com>
" I wouldn't worry about frequency unless you have some "iron" in the supply
" and are going down in frequency, like using some military 400 Hz AC on 60
" Hz lines.

yeah, 50 and 60 are pretty close, and if it's a switcher the first
thing it'll do is rectify anyway.

if it isn't, that reminds me of another trick from decades ago i read
about - put a cap in line with the line input, big enough to cancel
some of the transforner's reactance and resonate just well enough to
double the 115vac.  i recall 10-15 uF for ancient 240v/50hz radio
gear...  i don't remember any equations; i'm lucky to retrieve this

" On Tue, Mar 26, 2019, 16:19 Sandwich Maker <adh at an.bradford.ma.us> wrote:
" > " From: Earl Baugh <earl at baugh.org>
" > "
" > " []
" > "
" > "
" > " When I got the
" > " 240v one, I found that it was missing the fuse (no idea if that was because --
" > " "steal the fuse for another machine" or "take the fuse from a broken PS" ) I
" > " did try using the fuse from the 115v one and plugged it in (figuring at worst
" > " it wouldn't come on...)  and it simply didn't turn on.  I don't have a way to
" > " generate EU power to see if it works... since I'm in the US (without any sort
" > " of variac or the like).
" >
" > a thought - while the ps is *voltage* sensitive, it probably isn't
" > *frequency* sensitive; you could wire up a 230v 60hz ckt from your
" > breaker pnl - something like a nema6-15 duplex for example.
Andrew Hay                                  the genius nature
internet rambler                            is to see what all have seen
adh at an.bradford.ma.us                       and think what none thought

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