23 Apr
2020
23 Apr
'20
8:58 a.m.
Cool, thanks for your take. I found some articles:
-
http://www.angelfire.com/electronic/funwithtubes/steps_to_first_power_on.ht…
- 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