> On Aug 28, 2019, at 2:07 AM, Guy Dunphy via cctalk
> wrote:
> An extremely common problem with all old electronics from around that era.
> The mains filter caps are commonly 'RIFA' brand metalized polyester film,
> encapsulated in a clear-honey-coloured resin.
> The problem is that the resi
On Wed, 28 Aug 2019, Peter Coghlan via cctalk wrote:
I've had several instances of it with BBC Micros, also containing Astec brand
power supplies. Typically, when switched on after a long period of idleness,
the machine works fine for minutes to hours, then there is a quiet pop followed
by a wh
> To: 'Marvin Johnston' ; 'General Discussion: On-Topic and
> Off-Topic Posts'
> Subject: RE: TRS-80 Fireworks
>
> Quite normal - the capacitors dry out after about 30 or 40 years - there's
> lots
> of info around on replacing them with a polymer ca
On 8/28/2019 4:50 PM, Kevin Parker via cctalk wrote:
Quite normal - the capacitors dry out after about 30 or 40 years - there's
lots of info around on replacing them with a polymer capacitor. I have over 20
TRS-80's with a large contingent of Model 3, 4, 4Ps, 12 and 16s - all had the
same iss
Quite normal - the capacitors dry out after about 30 or 40 years - there's
lots of info around on replacing them with a polymer capacitor. I have over 20
TRS-80's with a large contingent of Model 3, 4, 4Ps, 12 and 16s - all had the
same issue so if I acquire one now I do a pre-emptive strike be
Hello all,
S100 based computers have the same problem. I have had the caps in
the PS and on the individual boards go boom. Common failure mode for
electrolytics and tantalums.
GOD Bless,
rich!
On 8/28/2019 3:10 AM, Peter Corlett via cctalk wrote:
On Wed, Aug 28, 2019 at 07:07:21PM +1000,
> On Aug 28, 2019, at 1:12 PM, Tony Duell via cctalk
> wrote:
>>
> Some people avoid RIFA capacitors, I don't...
>
> A Model 4 is going to be over 30 years old now. And (I assume) the
> original capacitors
> have been fine up until now. So if the replacements last as long I'll
> be fixing it
I had the cover off one of the newer style Model 12/16B/6000 floppy
expansion units (nicknamed "The Toaster"). As my wife walked by one
of the Rifa caps blew and a fragment hit her shin. She was not
happy. Mostly from the flash and loud pop. It also scared the cat
that was sitting on a chair b
On Wed, Aug 28, 2019 at 6:07 PM Marvin Johnston via cctalk
wrote:
>
> While getting ready to order some Kemet caps from Digi-key (same P/N
> posted earlier), I noticed they all had "RIFA" on them. Is this a big
> OOPS to order them, or would they be okay?
>
> I tend to prefer fixing something once
While getting ready to order some Kemet caps from Digi-key (same P/N
posted earlier), I noticed they all had "RIFA" on them. Is this a big
OOPS to order them, or would they be okay?
I tend to prefer fixing something once :).
Marvin
indicated that the Chinese caps are the worst offenders... they stole the
formula but apparently "modified" it slightly ending up with future problems.
That was a while ago, and post-TRS-80 era.
Some of this information falls into the "I don't know what I don't know"
catagory. Nice having the
On Wed, Aug 28, 2019 at 5:06 PM Ethan O'Toole via cctalk
wrote:
>
>
> We were at this HOPE conference in NYC. We were helping with it in those
> days, so we had some equipment at the ops area. A whole bunch of commotion
> went down in the OPS area, including someone grabbing a fire extingisher
> a
We were at this HOPE conference in NYC. We were helping with it in those
days, so we had some equipment at the ops area. A whole bunch of commotion
went down in the OPS area, including someone grabbing a fire extingisher
and jumping.
Watching this from a-far, we chuckled and I said, "Good t
> On Aug 28, 2019, at 10:10 AM, Marvin Johnston via cctalk
> wrote:
>
> Almost all of my Model 100s (around 8 or so) need to have all of the
> electrolytics replaced. For some reason, they started leaking and causing a
> problem with desoldering the bad parts. Upon close examination, the lea
Almost all of my Model 100s (around 8 or so) need to have all of the
electrolytics replaced. For some reason, they started leaking and
causing a problem with desoldering the bad parts. Upon close
examination, the leaking caps can be detected relatively easily. Some
information I saw somewhere i
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 i
> On Aug 28, 2019, at 9:34 AM, Marvin Johnston via cctalk
> wrote:
>
> 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 m
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 si
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
ctalk on behalf of Ethan Dicks via
cctalk
Sent: Wednesday, August 28, 2019 5:34 AM
To: Marvin Johnston ; General Discussion: On-Topic and
Off-Topic Posts
Subject: Re: TRS-80 Fireworks
On Wed, Aug 28, 2019 at 4:16 AM Marvin Johnston via cctalk
wrote:
> I'm just curious how many people ha
On Wed, Aug 28, 2019, 8:35 AM Ethan Dicks via cctalk
wrote:
> On Wed, Aug 28, 2019 at 4:16 AM Marvin Johnston via cctalk
> 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?
>
Trs 80 III / 4 absolutely y
On Wed, Aug 28, 2019 at 4:16 AM Marvin Johnston via cctalk
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
On Wed, 28 Aug 2019 at 10:16, Marvin Johnston via cctalk
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?
"They all do that, sir."
Computers older than 20y or so, that is. :-(
--
Liam Proven - Profile:
> On Aug 28, 2019, at 4:15 AM, Marvin Johnston via cctalk
> 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?
>
> So far, I've gotten the fireworks in two out of two TRS-80s (model 3 and 4)
> when the
> -Original Message-
> From: cctalk On Behalf Of Guy Dunphy via
> cctalk
> Sent: 28 August 2019 10:07
> To: Marvin Johnston ; General Discussion: On-Topic and
> Off-Topic Posts
> Subject: Re: TRS-80 Fireworks
>
> At 01:15 AM 28/08/2019 -0700, you wrote:
&
On Wed, Aug 28, 2019 at 07:07:21PM +1000, Guy Dunphy via cctalk wrote:
[...]
> RIFA caps may be the most hated components in electronics. Even worse than
> dipped
> tantalums, popped electrolytics, and decaying urethane foam.
Amiga collectors would say "batteries", since Commodore selected a bran
Matt wrote:
> On 28/08/2019 09:15, Marvin Johnston via cctalk 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?
> >
> > So far, I've gotten the fireworks in two out of two TRS-80s (model 3
> > and 4) when t
At 01:15 AM 28/08/2019 -0700, you 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?
>
>So far, I've gotten the fireworks in two out of two TRS-80s (model 3 and
>4) when they were powered up. In both cases, the
On 28/08/2019 09:15, Marvin Johnston via cctalk 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?
>
> So far, I've gotten the fireworks in two out of two TRS-80s (model 3
> and 4) when they were powered up. In
I have had this problem in various PSUs, particularly in MicroVAXen. In my case
replacing them has been fairly straightforward. Not had this with my TRS-80
(Model 1) though. I think it is a fairly common problem.
Regards
Rob
> -Original Message-
> From: cctalk On Behalf Of Marvin John
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