[vcf-midatlantic] Any trick to discharging ADM-3A

Joseph Oprysko joprysko1 at gmail.com
Thu Feb 8 00:01:28 EST 2018

I’ve done the screwdriver trick myself. Because often, even after waiting a
few weeks, there can still be enough voltage to make your hair stand on
end. LOL

On Wed, Feb 7, 2018 at 7:05 PM Ian Primus via vcf-midatlantic <
vcf-midatlantic at lists.vintagecomputerfederation.org> wrote:

> I don't remember any particular trick or real difficulty in doing it.
> Maybe you needed to get the tube loose to get the screwdriver in
> there? But I thought it would fit in there without too much problem. I
> know I've done it a whole bunch of times and nothing sticks out at me
> as being out of the ordinary about working on the 3A. Remember you
> don't need to disconnect the anode connection right away, just
> discharge it.
> If you're doing a lot of work on one of those monitors, sometimes you
> do need to get a bit creative though:
> https://i.imgur.com/k2wPmw3.jpg
> https://i.imgur.com/UwU3gek.jpg
> -Ian
> On Wed, Feb 7, 2018 at 6:29 PM, corey cohen via vcf-midatlantic
> <vcf-midatlantic at lists.vintagecomputerfederation.org> wrote:
> > So I was about to swap out my ADM5 for my ADM3a with my ALTAIR and
> realized while I did replace the electrolytic and tantalum caps on the main
> board, I didn’t change the electrolytic caps on the analog board behind the
> tube.
> >
> > No big deal except that the rubber cup is on the top where I can’t get
> to it without removing the tube and you aren’t really supposed to remove
> the tube till you discharge it under the rubber cup.    So chicken or the
> egg?
> >
> > Or am I just supposed to let the ADM sit unplugged for a few weeks and
> just assume it self discharged?
> >
> > Just when I thought I was finished with this project and was going to
> move onto my TI silent rebuild.
> >
> > Thanks,
> > Cheers,
> > Corey
> >
> > corey cohen
> > uǝɥoɔ ʎǝɹoɔ
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