be good to use a dim bulb tester starting with a low wattage bulb

Vintage Asylum

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In Reply to: Reviving Solid State Equipment posted by DIY John on June 15, 2022 at 13:11:21:

This will drop the voltage and act as a current flow regulator. If there are issues the bulb will glow brightly as the short circuit tries to get full power, the dbt keeping stuff from burning up. Then evaluate for that problem.

If the bulb stays dim after the initial turn on when the caps fill up, leave it for a period of time and then repeat with a larger bulb...allowing a higher voltage for a few steps. I would probably use 25W, 40W, 75w and then 100W unless it is a big power unit in which case I'd continue to 150W.

All these 20min-1+ hour steps allow the old, unused in years electrolytic capacitors to reform which takes time.

Since I have a variac, I would use a 100W bulb and variac the unit from 20V on up in steps. If all it good do to line level power.

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Follow Ups Full Thread

Topic - Reviving Solid State Equipment - DIY John 13:11:21 06/15/22 (10)

Modified approach - DIY John 06:25:06 06/17/22 (0)

RE: Reviving Solid State Equipment - DIY John 03:11:48 06/16/22 (2)

Well the Sony V-FET amps will respond very badly to using a variac or - kff 07:31:15 06/16/22 (0)

RE: Reviving Solid State Equipment - Story 04:03:37 06/16/22 (0)

be good to use a dim bulb tester starting with a low wattage bulb - kff 17:10:09 06/15/22 (0)

First do a visual inspection. - viridian 13:26:18 06/15/22 (4)

Got it. - alaskahiatt 00:23:12 06/16/22 (2)

Heck, don't give it to me! nt - viridian 08:30:24 06/16/22 (0)

Aww man. You let out the magic smoke! - DIY John 02:58:56 06/16/22 (0)

RE: First do a visual inspection. - Triode_Kingdom 17:05:37 06/15/22 (0)

Follow Ups

be good to use a dim bulb tester starting with a low wattage bulb - kff 17:10:09 06/15/22 (0)

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