On Jan 12, 2022, at 11:23 PM, Rob Jarratt via cctalk
wrote:
>
> I love an excuse to buy a tool. I think *good* tools are always a worthwhile
> investment. After a buying a tool that I think I will only use once, I tend
> to find other uses for it over time. Maybe you will find yourself needing t
>
> The hot tweezer sounds very nice but I think I'll stick with what I have
for
> now. These machines have other problems and won't ever do anything
> useful unless I get the cache issues sorted out so I don't necessarily
want to
> invest in new tools for them to end up not getting them repaired
On Wed, 12 Jan 2022 at 17:28:33 -0600 Richard Schauer via cctalk wrote:
On Wed, 12 Jan 2022, Peter Coghlan via cctalk wrote:
They do have spikes of solder sticking out from the positive ends
Yes, those are tantalum caps. The "hat" as I've always called it marks
the positive end, and it shoul
On Wed, 12 Jan 2022, Jon Elson via cctalk wrote:
> > Thanks Jon.
> >
> > Here is a badly focused picture of the suspect components:
> >
> > http://www.beyondthepale.ie/cctech/p1010198.jpg
>
> WOW, I don't know what those are! They look like big ceramic caps to me, but
> if they don't have any
On Wed, 12 Jan 2022 at 19:30:58 +, Peter Coghlan via cctalk wrote:
On Wed, 12 Jan 2022 at 11:02:47 -0600 Jon Elson via cctalk wrote:
On 1/11/22 5:17 PM, Peter Coghlan via cctalk wrote:
Thanks Jon.
Here is a badly focused picture of the suspect components:
http://www.beyondthepale.ie/ccte
On Wed, 12 Jan 2022, Peter Coghlan via cctalk wrote:
They do have spikes of solder sticking out from the positive ends
Yes, those are tantalum caps. The "hat" as I've always called it marks
the positive end, and it should be part of the case, so it won't melt away
in solder. These things ar
On Wed, 12 Jan 2022 at 11:02:47 -0600 Jon Elson wrote:
On 1/11/22 5:17 PM, Peter Coghlan via cctalk wrote:
Thanks Jon.
Here is a badly focused picture of the suspect components:
http://www.beyondthepale.ie/cctech/p1010198.jpg
WOW, I don't know what those are! They look like big
ceramic ca
On Wed, 12 Jan 2022 at 11:02:47 -0600 Jon Elson via cctalk wrote:
On 1/11/22 5:17 PM, Peter Coghlan via cctalk wrote:
Thanks Jon.
Here is a badly focused picture of the suspect components:
http://www.beyondthepale.ie/cctech/p1010198.jpg
WOW, I don't know what those are! They look like big
On 1/11/22 5:17 PM, Peter Coghlan via cctalk wrote:
Thanks Jon.
Here is a badly focused picture of the suspect components:
http://www.beyondthepale.ie/cctech/p1010198.jpg
WOW, I don't know what those are! They look like big
ceramic caps to me, but if they don't have any polarity
marking,
Thanks Eugene.
Perhaps I should have more clearly stated that whatever short was there cleared
itself pretty much as soon as it happened, leaving no evidence of where it
it had been and nothing to go on to locate it. There is no sign of anything
getting hot afterwards.
The machine still seems to
On Tue, 11 Jan 2022 13:57:07 -0600, Jon Elson wrote:
On 1/11/22 10:40 AM, Peter Coghlan via cctalk wrote:
I have a rackmount DEC 3000/600 Alphaserver containing a H7816-BA power supply
which doesn't work. As I mentioned before, this power supply is a real pig
to work on.
I also have two tablet
A bad tant will show 0V across it and it will show 0V (or very close to it)
across all the other tants used as filter caps on that same rail. I would turn
it back on and measure all of your rails. See which is affected. Then pull out
every card in the system that uses that rail (probably all car
On 1/11/22 10:40 AM, Peter Coghlan via cctalk wrote:
I have a rackmount DEC 3000/600 Alphaserver containing a H7816-BA power supply
which doesn't work. As I mentioned before, this power supply is a real pig
to work on.
I also have two tabletop DEC 3000/600 Alphaservers which contain H7816-AA
po
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