On 25/06/2017 11:46, Rob Jarratt via cctalk wrote:
I have done a bit more tracing of components and have come across a
possibly anomaly. The signal that won't go low enough goes to the
input (pin 2) of a 74LS125 buffer.
OK, for SOIC parts, here's my technique. (I've had to
replace quite a
Well, at least it was DEC who messed up and not me (this time).
Noel, thanks for scanning.
Al, thanks for figuring it out.
Paul
On Sat, Jun 24, 2017 at 11:50 AM, Al Kossow via cctalk <
cctalk@classiccmp.org> wrote:
> They screwed up when they made the maint prints, it's missing from ours as
>
> -Original Message-
> From: Dave Wade [mailto:dave.g4...@gmail.com]
> Sent: 25 June 2017 20:26
> To: r...@jarratt.me.uk; 'Rob Jarratt' ; 'General
> Discussion: On-Topic and Off-Topic Posts'
> Subject: RE: DECstation 220 - Out of Ideas?
>
> Rob,
> I have a cheap hot air re-work station
wow impressive work Brad! Thanks for blogging about it, it's fun to
watch you progress. Ever consider selling some of the PCB boards, and
coming up with a BOM list, so we can recreate some too?
Heheh, that's a cool idea. I use a post-it note, sliding a non-sticky side
under the pins (from the rear of said pins) as I drag the iron across all
the pins.
=]
On Sun, Jun 25, 2017 at 11:27 AM Pete Turnbull via cctalk <
cctalk@classiccmp.org> wrote:
> On 25/06/2017 11:46, Rob Jarratt via cctal
Rob,
I have a cheap hot air re-work station that you are welcome to borrow. You
might need to order a nozzle as I do,t have many
Dave
> -Original Message-
> From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Rob Jarratt
> via cctalk
> Sent: 25 June 2017 11:47
> To: 'Genera
On 06/25/2017 11:41 AM, Rob Jarratt wrote:
> Thanks Chuck, I had seen some mention of Chip Quik. You say soldering a new
> part is straightforward, but I am not clear how that works, is the solder
> left behind on the pads so you just heat the pins?
As mentioned, I use the toothbrush to scrub t
> When replacing components on an SMD board, I prefer to use a low-temp
> fusible alloy such as "Chip Quik":
>
> http://www.chipquik.com/store/
>
> A nice kit, but really, any low temp fusible alloy will work. I use
> Cerrobend as a
> powder, packed around the IC.
>
> http://www.csalloys.com/s
On 06/25/2017 09:24 AM, Rob Jarratt via cctalk wrote:
> Thanks Pete, so there is enough of a chance that I have found the
> culprit to make it worth the effort of desoldering it.
>
> I have been wondering for a while about getting a hot air rework
> station. There are lots of cheap Chinese ones o
> From: Al Kossow
Hey, thanks for all the effort to help...
> which has the schematic
> they have been there for over three years
$@#&($^@(*$&^! That's what I get for trusting Google; I tried searching
for '"DB11-A" prints' and '"DB11-A" drawings' and got nothing ... except for
a
> -Original Message-
> From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Pete
> Turnbull via cctalk
> Sent: 25 June 2017 16:12
> To: cctalk@classiccmp.org
> Subject: Re: DECstation 220 - Out of Ideas?
>
> As soon as I saw "74LS125" I thought, "Oh, yes, another one". That'
On 25/06/2017 11:46, Rob Jarratt via cctalk wrote:
I have done a bit more tracing of components and have come across a
possibly anomaly. The signal that won't go low enough goes to the
input (pin 2) of a 74LS125 buffer.
As soon as I saw "74LS125" I thought, "Oh, yes, another one". That's a
f
On 2017-06-23 14:55, Connor Krukosky via cctalk wrote:
I am in no way affiliated and wish it wasn't on the other side of the
country so I could get it!
https://sfbay.craigslist.org/scz/sys/6188389886.html
"I have a single monochrome HP 9836 computer with two monitors and three
printers left.
Al
> Thanks Ian. Unfortunately I don't know of any schematics. I suspect you are
> right about it being a wire-OR because the documentation for the P82C206 says
> its output is tri-state. As everything is soldered on rather than socketed
> (except
> the ROMs) I am not sure I can measure any current
> -Original Message-
> From: Ian S. King [mailto:isk...@uw.edu]
> Sent: 25 June 2017 01:07
> To: r...@jarratt.me.uk; Rob Jarratt ; General
> Discussion: On-Topic and Off-Topic Posts
> Subject: Re: DECstation 220 - Out of Ideas?
>
> Rob
> I don't recall from this thread - do you have pri
Good eye! That's Bob indeed.
Marc
From: cctalk on behalf of
"cctalk@classiccmp.org"
Reply-To: dwight , "cctalk@classiccmp.org"
Date: Friday, June 23, 2017 at 2:45 PM
To: Connor Krukosky , "cctalk@classiccmp.org"
Subject: Re: Free HP 9836 in Santa Cruz, CA
Sounds like Bob Rosenbloom.
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