On Sun, 19 Jul 2015, dwight wrote:
I have rarely seen static damage to electronic parts. I can imagine that
if I were in Nevada during winter time, I might see more. There were
times when, even with a key to be the discharge point that my arm still
jumped.
On parts, the ones I've seen that I c
On Mon, Jul 20, 2015 at 4:46 PM, Rich Alderson
wrote:
> industry white papers with tables of decay rates for
> the aluminum electrolytics that indicate that, *no matter what*, they lose
> capacitance over time, until c. 14 years from manufacturer date they are at
> 10%
> of rating.
That's very i
> I've not replaced any in a PDP11 power supply, however I have replaced
> them in other equipment with equally large PSUs. In the odd case where a
> computer grade screw terminal capacitor is extremely expensive or
> completely unobtainable (those which I've purchased were under $20-30) I
> might
On Mon, 20 Jul 2015, Rich Alderson wrote:
On Sat, 18 Jul 2015, Peter Coghlan wrote:
Rich Alderson wrote:
It is generally a good idea to re-form electrolytic capacitors in
power supplies, and to bench check the power supplies (under some
kind of load) before actually applying power to the wh
On Mon, 20 Jul 2015, tony duell wrote:
Replace - yes, *especially* if you don't have a big budget. Aluminum
electrolytic capacitors are CHEAP and easy to obtain. Replacement
semiconductors by comparison are expensive and can be quite difficult
to find.
Err, have you priced the screw-terminal
> On Jul 20, 2015, at 18:02 , Tothwolf wrote:
> I replace wax paper types with polyester (mylar), polystyrene or ceramic
> discs, depending on how they are used in the circuit (note however that for
> wound foil types, modern replacement parts do not mark the outside foil,
> which needs to be
On Mon, 20 Jul 2015, Mark J. Blair wrote:
Now on the topic of capacitors: The only component type that I replace
on sight at this point are the Rifa paper-dielectric EMI suppression
caps. Had one go incendiary on me so far, and I do a replace-on-sight
routine on them because my hypothesis of t
I have an IBM 5120 desktop computer to give away, but it has no circuit cards,
so it won't work as-is.
Danger- it weighs 100 pounds.
Located in Orange County, CA 92656
From: Peter Coghlan
Sent: Saturday, July 18, 2015 1:27 AM
> Rich Alderson wrote:
>>> It is generally a good idea to re-form electrolytic capacitors in power
>>> supplies, and to bench check the power supplies (under some kind of
>>> load) before actually applying power to the whole unit.
>> It
As I mentioned previously, I took some time off from working on the
MEM11 for the past several months.
I had some time over the past few days, so I spent it working on the
simulator.
Right now all of the J1 instructions seem to simulate properly.
Everything related to the basic simulator
also
> -Original Message-
> From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Chuck
> Guzis
> Sent: 15 June 2015 18:25
> To: gene...@classiccmp.org; discuss...@classiccmp.org:On-Topic and Off-
> Topic Posts
> Subject: Re: using new technology on old machines. Was: PDP-12 Restorati
>
> Did it look something like this?
>
> http://www.sandman.com/images/swbdlampext.jpg
That looks very like the UK Post Office tool I mentioned. Take a look here :
http://www.samhallas.co.uk/collection/test.htm
at the 'Extractor, Lamp, No 5'.
This tool has an extension moulded on the han
On Mon, 20 Jul 2015, Jay West wrote:
What I'd really like, is one of those "light bulb replacement tools" for the
2100 :)
As anyone knows who has replaced them before, it's a bit of a frustrating
pain to get them inserted just right given clearences and such :)
I'm not positive, but I seem to
>
Yes, you're right, the darn things are bipin, not midget flange. ARGH!,
Repairing those
is a lot harder...
> What I'd really like, is one of those "light bulb replacement tools" for the
> 2100 :)
> As anyone knows who has replaced them before, it's a bit of a frustrating
> pain to get them i
for some reason I remember using a piece of plastic tubing?
Ed# _www.smecc.org_ (http://www.smecc.org)
In a message dated 7/20/2015 11:13:32 A.M. US Mountain Standard Time,
jw...@classiccmp.org writes:
What I'd really like, is one of those "light bulb replacement tools" for
the
2100 :)
What I'd really like, is one of those "light bulb replacement tools" for the
2100 :)
As anyone knows who has replaced them before, it's a bit of a frustrating
pain to get them inserted just right given clearences and such :)
I'm not positive, but I seem to recall back in foggy memory that there w
Tony said:
What is the electrical rating?
For the 2140-0364, aka CM7361-200
MRC Parameter Characteristics
ABHPOverall Length 0.625 inches maximum
AFSPFilament DesignationC-2R
AFSTLight Output Rating 0.050 spherical candlepower nominal single
rating
AFSV
>
> A CM7361 is a T - 1 3/4 bi-pin base bulb rated at 5V and 60ma.
I am pretty sure that's the rating of the wire-ended bulbs I used to repair the
bulb
in an HP instrument.
-tony
On Jul 20, 2015 9:55 AM, "tony duell" wrote:
>
> What is the electrical rating?
>
> IIRC these are midget flange bulbs.
A CM7361 is a T - 1 3/4 bi-pin base bulb rated at 5V and 60ma.
Not sure about the originals.
>
> Greetings folks. I'm on a mission to get some replacement bulbs for my
> 2100A/S machines. The official part is 2140-0364 (38 of them per machine).
> Google appears to indicate that an identical replacement is CM7361-200. One
> of my old parts donor 2100's has both OL-783BP and OL-783BPC, but
On Jul 20, 2015 9:31 AM, "Jay West" wrote:
>
> Is there some difference between CM7361 and CM7361-200?
>
> J
That I do not know. I haven't looked for datasheets with any possible
differences yet.
I'll have to check what type of bulbs I still might have installed as
originals and could at least m
Glen;
-
I bought (40x) CM7361 from Mouser last month (Mouser part # 606-CM7361). At
>=10 and <100 they were $0.72 each. They are rated at
25,000 hour.
I haven't installed any of this batch in my 2100A yet. I think I installed some
of the same previously.
-
Is there some difference betwee
Anybody have a use for one of these (actually a
two-board set)?
I've got two of the 'A' boards and one 'B' board
missing the 3 ROM and RAM chips, condition
unknown; yours for $5.00 per board ($15/set) &
postage from Toronto.
m
On 7/20/2015 8:59 AM, Jay West wrote:
Snipped...
Has anyone already found a good source/price for these? Given the number of
bulbs per machine, cheaper is better :) I may have to go to one of those
bulk purchase parts places, in which case I'd probably need an order of 1000
or so. If I have
On Mon, Jul 20, 2015 at 8:59 AM, Jay West wrote:
> Greetings folks. I'm on a mission to get some replacement bulbs for my
> 2100A/S machines. The official part is 2140-0364 (38 of them per machine).
> Google appears to indicate that an identical replacement is CM7361-200. One
> of my old parts don
On Mon, 20 Jul 2015, Adrian Graham wrote:
> We still have a few AS4100s out there in the field and CPU fans are
> becoming scarce, so being canny we sourced some *almost* identical
> replacements to no avail.
In the majority of cases, it is the bearings that fail and they are
commercially obtaina
Greetings folks. I'm on a mission to get some replacement bulbs for my
2100A/S machines. The official part is 2140-0364 (38 of them per machine).
Google appears to indicate that an identical replacement is CM7361-200. One
of my old parts donor 2100's has both OL-783BP and OL-783BPC, but I don't
kno
On 2015-07-20 17:31, Adrian Graham wrote:
Hi,
Do the original fans have speed sensors? There were several different
versions of this. Some fans have an OK signal, some give a pulse once per
rev. Did the original fans have 3 wires?
Yes, I put them down as +12V, GND, Pulse.
Original fan: ht
Hi,
>Do the original fans have speed sensors? There were several different
versions of this. Some fans have an OK signal, some give a pulse once per
rev. Did the original fans have 3 wires?
Yes, I put them down as +12V, GND, Pulse.
Original fan: http://f0p.co.uk/AS4100original.JPG
Replacement
On 07/20/2015 09:23 AM, Adrian Graham wrote:
Folks,
I didn't realise there'd been a clasiccmp server meltdown, wondered why I
wasn't getting mails :)
We still have a few AS4100s out there in the field and CPU fans are
becoming scarce, so being canny we sourced some *almost* identical
replacemen
If I may go back to the original post topic for a moment, what model is that
line printer that is pictured? I'm on the lookout for a DEC LP32 to go with my
11/730.
Now on the topic of capacitors: The only component type that I replace on sight
at this point are the Rifa paper-dielectric EMI sup
Folks,
I didn't realise there'd been a clasiccmp server meltdown, wondered why I
wasn't getting mails :)
We still have a few AS4100s out there in the field and CPU fans are
becoming scarce, so being canny we sourced some *almost* identical
replacements to no avail.
Original spec for the fan is 1
>
> Replace - yes, *especially* if you don't have a big budget. Aluminum
> electrolytic capacitors are CHEAP and easy to obtain. Replacement
> semiconductors by comparison are expensive and can be quite difficult to
> find.
Err, have you priced the screw-terminal 'computer grade' electolytic capa
On 07/19/2015 02:03 AM, tony duell wrote:
So, tony, if I'm correct, you just called "bullshit", right?
I assume this relates to my comments on static damage of PDP11 PSUs,
I am not sure I would quite put it that way (not on a public list :-)) but (a)
I have never seen a DEC
PSU (in a PDP11 o
what is condition of the mod 100 trs 80? more concerned abut visual as
it would go in a tools of the journalist over at the univ or if anyone
else has one they could toss in a box and send this way. They were one of
the early "issued items" to some reporters to phone home stories.
On 2015-Jul-19, at 10:45 PM, couryhouse wrote:
> What are you going to do with it?Looking. For a wt78 but this fell in our
> lap
While I did expect DEC-anything would attract more interest, I was figuring
people would have read my message from earlier in the day, here's the
extract/back
36 matches
Mail list logo
