Re: variac/dc power supply repair
- From: "Arfa Daily" <arfa.daily@xxxxxxxxxxxx>
- Date: Mon, 06 Mar 2006 08:49:23 GMT
"Ryan Underwood" <nemesis@xxxxxxxxxxxx> wrote in message
news:na6dnQkNwIo4PJbZ4p2dnA@xxxxxxxxxxxxx
Hi,The fuse is easily enough tested using a simple ohm meter, or by
I just acquired a Lab-Volt model 189 bench supply, 1966 vintage. It has a
passthrough AC output, a variac output, and a variable DC output.
Unfortunately, the variable outputs do not work (0 voltage independent of
knob setting). The pass through output does work though.
The fuse is a screw-in type, black thumb screw reads "Fuse" and when it
pulls
out, there is a loose metal cylinder around the end of the fuse. I have
no
idea how to test this type of fuse or even what it is called.
Anyone have pointers where to get started on this thing? The construction
appears to be nothing more than a bunch of transformers and a knob. I'm
not
familiar with these variable type supplies.
Thanks.
substitution, but to be honest, if you do not have sufficient knowledge to
be able to troubleshoot a simple power supply of this vintage, I really
would not recommend that you start poking around inside, as there are
dangerous voltages present in any mains power supply. Sorry to be so
negative about this, but I'm only thinking of your safety ...
Arfa
.
- References:
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- From: Ryan Underwood
- variac/dc power supply repair
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