28 Aug
2019
28 Aug
'19
7:03 a.m.
The article I found online was:
http://www.akhara.com/trs-80/psrepair/index.html
But the reference you posted gave me some excellent perspective on the
what is what and why :)!
Marvin
On 8/28/2019 6:50 AM, W2HX wrote:
Be sure to read this article. The caps used in this
capacity (pun intended) are specialized...
https://www.allaboutcircuits.com/technical-articles/safety-capacitor-class-…
________________________________________
From: cctalk <cctalk-bounces at classiccmp.org> on behalf of Marvin Johnston via
cctalk <cctalk at classiccmp.org>
Sent: Wednesday, August 28, 2019 9:34 AM
To: Ethan Dicks; General Discussion: On-Topic and Off-Topic Posts
Subject: Re: TRS-80 Fireworks
Thanks everyone for the feedback... I had no idea. I'll be putting in an
order today with Digi-key (P/N 399-7483-ND) for probably around 25+ caps
or so since I have at least that many TRS-80 2s, 3s, 4s.
I guess my only question is are there other similar caps that also need
to be replaced? I'm well aware of the electrolytics and have that
project on the back burner right now (about 10 Model 100s to repair.) It
is nice that they are pretty trivial to replace!
Marvin
On 8/28/2019 5:34 AM, Ethan Dicks wrote:
On Wed, Aug 28, 2019 at 4:16 AM Marvin Johnston
via cctalk
<cctalk at classiccmp.org> wrote:
I'm just curious how many people have powered
up their TRS-80 computers,
and ended up with a bang and a room filled with smoke?
I've had identical experiences with Rifa caps as others here. One
thing about them, you don't need to be powered on. The caps are
usually on the hot side of the power switch. I've had a MicroPDP-11
and a Commodore D9060 sizzle when plugged in but powered off.
Is this a normal problem with these older
computers? I'm used to seeing
the electrolytics give problems, but this is the first time I've seen
one of the X type line filter caps blow.
Rifa caps are notorious for reasons already described.
Found in a lot of 1980s gear, TRS-80, Commodore, DEC... Replace on sight.
-ethan