On Aug 17, 11:21 pm, Highland Ham
wrote:

==============================================
Don't understand the above.
When using a variac starting at zero and gradually increasing the
voltage there can't be any appreciable inrush current.

I happen to have a 8 Amperes variac and would always use it to 'fire-up'
a previously retired oldtimer (boat anchor)

I have a rather large junk box with high capacitance value elcos and
recently exposed them all to a 'zero to max working voltage' from an
adjustable HV PSU. I do that once every 3 years.

Frank GM0CSZ / KN6WH

Well, mine took out a few SMPS power supplies, and its a pain in the
arse to set up, connect meters, gingerly spend time slowly
incrementing the voltage - life is too short to stuff around......

Hey, you got time to do Rocket Science, thats fine. Each to his own.

Andrew VK3BFA.

On Aug 17, 6:44*pm, Andrew VK3BFA wrote:
and its a pain in the
arse to set up, connect meters, gingerly spend time slowly
incrementing the voltage - life is too short to stuff around......

Hey, you got time to do Rocket Science, thats fine. Each to his own.

I think that turning it on, blowing up the capacitors that are gonna
blow up, and then replacing the ones that actually did blow up is a
fine procedure, myself.

There is a certain pussyfoot attitude about either cranking up the
variac gingerly, or simply recapping the whole radio, that is not
really appropriate to somebody (me!) who really wants to see smoke
coming out at least once in a while.

Only gotcha, if the bad capacitor takes out a transformer, that's a
PITA. Not that I've never rewound bad transformers or rewound them for
a project, but having to rewind a transformer just because I was
impatient is a little embarassing.

Tim.

On Aug 22, 2:52 pm, Tim Shoppa wrote:

I think that turning it on, blowing up the capacitors that are gonna
blow up,
who really wants to see smoke
coming out at least once in a while.

You been watching to much myth busters?

Only gotcha, if the bad capacitor takes out a transformer, that's a
PITA. Not that I've never rewound bad transformers or rewound them for
a project, but having to rewind a transformer just because I was
impatient is a little embarassing.

I think you going to has to jump the fuse to get away with that?
Nothing I hate more than shorted parts especially a shorted fuse.

73 OM
n8zu

On Aug 23, 5:23*am, raypsi wrote:
On Aug 22, 2:52 pm, Tim Shoppa wrote:



I think that turning it on, blowing up the capacitors that are gonna
blow up,
who really wants to see smoke
coming out at least once in a while.

You been watching to much myth busters?

Not really, but a former schoolmate has worked at a place titled
"Center for Non-Destructive Testing" and my first comment to him (like
15 years ago) was "Where's the fun in that?"

Only gotcha, if the bad capacitor takes out a transformer, that's a
PITA. Not that I've never rewound bad transformers or rewound them for
a project, but having to rewind a transformer just because I was
impatient is a little embarassing.

*I think you going to has to jump the fuse to get away with that?
Nothing I hate more than shorted parts especially a shorted fuse.

The fuse is there to help (not guarantee) stop things from catching on
fire and burning down your house.

It's not there to save components.

It is sized based on primary current, not the current capacity of any
individual secondary or the components hooked to any individual
secondary.

Tim N3QE