7 Jun
2010
7 Jun
'10
6:40 p.m.
Still, it
can't hurt to measure the primary current with no load on the
secondaaries. If you have a wattmeter, masure the power consumed by the
trransformer with no secodnary load (note that this is _not_ the product
of the primary corrent and the mains voltage, they will not be in phase).
If there is significant power drawn on no-load, then suyspect a shorted turn.
Yup. Have a wattmeter and can make this measurement... however only
after desoldering all the connections from the transformer to the
chassis mounted bridge and the bridge mounted on a PCB since none of
this is connectorized. My personal
view (if I had such a machine) is that as the originial PSU
wasn't a switcher, you shouldn't use a switcher to do any form of upgrade
or repair. But it's really up to you.
I agree with this too absolutely.
I have another homebrew S100 machine from the same era and it too has
a marginal power supply... but I won't think twice about rebuilding
that one with a set of switchers. It has no pedigree or authentity to