Kennedy 9800 - Power-up tips?

[Anders Nelson]

Cool, thanks for your take. I found some articles:

   -
   http://www.angelfire.com/electronic/funwithtubes/steps_to_first_power_on.html
   - http://www.angelfire.com/electronic/funwithtubes/Restore_cap.html

Given this unit doesn't have any tubes, I imagine the motor drivers/amps in
this thing would simply go to zero output with shorted caps. The PSU might
blow the fuse and/or rectifier with a shorted bulk output cap. This unit is
very difficult to remove from the rack it's in so I'm trying to avoid
preemptive repairs.

I'm going to pick up a variac on Amazon when I finish up some other things:

https://www.amazon.com/dp/B076Y2XHRS/ref=twister_B07G5BHXYV

Happy to hear any constructive criticism.

--
Anders Nelson

+1 (517) 775-6129

www.erogear.com


On Thu, Apr 23, 2020 at 12:37 AM "Grif" w. keith griffith via cctalk <
cctalk at classiccmp.org> wrote:

>
> At least in radio repair of old equipment,,,, old electrolytic caps
> cause all sorts of issues. Most of the guys doing restoration do a total
> remove/replace on them.  In my opinion,,, I think that's a little
> extreme,,, but then having one fail after all the other work is done is
> also a PITA.
>
>
> On 4/20/20 11:15 AM, Anders Nelson via cctalk wrote:
> > Hi friends,
> >
> > Now that I have enough hobby time having quit my job two weeks before the
> > apocalypse, I'm interested in poking at my Kennedy 9800 tape controller
> > project.
> >
> > I bought the tape unit in Q3 2017 and the seller said they had powered it
> > up and nothing seemed awry. I have not powered it up and reading about
> old
> > electrolytic cap issues I'm curious if I should do anything beyond
> replace
> > any obviously leaking/ruptured capacitors.
> >
> > IIRC people have used a variac to gradually bring the power supply up to
> > operating voltage and somewhat refresh the capacitors - is this a thing?
> Is
> > this advisable?
> >
> > Any help is appreciated!
> > --
> > Anders Nelson
> >
> > www.erogear.com
>
>
>