At one of my usual electronics surplus stores the other day, they told me
"If I'm into old computers.... go see this scrap dealer" and gave me the
address. My interest was piqued, as it was not one I was already familiar
with. So, I headed out there today.
Interesting place... 8 acres... most of the stuff was inside crumbling
warehouses, some was outside in the elements. I believe I saw a deuce and a
half ;) But anyways... on to the computer stuff I noticed...
One of the lowboy HP cabinets (about 2.5 feet tall) with a 13037 subsystem
and 7906D drive mounted. The formica top was missing, but the insides looked
pristine. I already have one of these (with formica top), but may pick this
one up just to have a spare. They are perfect for a mobile drive (as mobile
as a 190 pound drive gets) and you can set a terminal on top (but don't
bother trying to read the screen when the drives voice coil is moving). I
may use the 7906 as a donor to get another 7906 working... anyways...
I noticed a large floorstanding Silicon Graphics machine, didn't get too
close to it but I think it said "IRIS" on it.
Summagraphics graphics tablet.
A large seven foot Digital rack with a processor, tape drive (TZ07), scsi
drive tray w/drives, RD42? (cd, no caddy). Dusty, but very good condition. I
may buy the TZ07. I couldn't see anything saying what kind of cpu it was.
The cpu tray had the cpu on the left, and 3 or 4 what looked to be hard
drive modules in front too. No clue what that is, I'm not familiar with that
era of DEC gear.
Saw another TZ07 too just sitting loose - it was a desktop enclosure - I may
snag that too.
Oh, there was a neat dual bay olive green rack - I'm guessing it was some
time of automated fire control for a military gun. Appeared to have front
panel buttons like "turret position, reload time, etc.". I think most of the
guts were westinghouse perhaps. Didn't appear to be (to me) an obvious OEM
cpu or anything. Quite old.
There were selectric typewriters by the palletfull.
Some huge floorstanding HP plotter... the front panel said something to the
effect of "HP Plotter model I". No interest to me.
Much to my joy - the guy who owned the place was just what us collectors
would hope for. Soon as I walked in the door he wanted to know what kind of
stuff I was looking for, my cell & home number, etc. He took copious notes,
and told me matter of factly he'd keep an eye out for the kind of stuff I'm
interested in and definitely call me immediately. Seemed most helpful. And
better yet, he said they have another location about 10 minutes away, but I
didn't have time to go look there. The guy did say "you do know stuff from
that period had decent amounts of gold in it", and I told him sure, and I'd
be happy to give him more than scrap value for stuff I'm interested in.
So, next weekend probably I'll go check out the other place. Note to self -
next time, take a flashlight, wear boots, and plan for more time - not every
area was searched.
>From: ard at p850ug1.demon.co.uk
>> Certainly, multifunction tubes were around - the first ones were the dual
>> diodes and rectifiers of the 1920s, then later twin triodes, extra diodes,
>> and yes, to the ultimate Compactrons.
>The most complex common multi-section valve in the UK (i.e. with the most
>sections), is the triple diode triode. It came with a variety of heater
>ratings -- the EABC80 (6.3V heater), UABC80 (100mA series string heater,
>by far the most common version) and the oddball PABC80 (300mA series
>string heater). It turned up in numerous AM/FM radios in the 1960s, where
>it was used for the AM detector (1 diode), FM detector (the other 2
>diodes) and audio ampifier (triode).
Higher quality AM receivers used the two diode tubes.
One diode was for the detector while the other was
used for the AGC. That way the loading could be optimized
for each function.
It has a B9A (9 pin miniature) base,
>so there must be some commoning of electrodes going on, probably the
>From: "Randy McLaughlin" <cctech at randy482.com>
>A friend of mine was a weapons office on a USN sub, one day we were talking
>about terrorists making a bomb. He started by saying the technology is
>above their heads. My response was get a bucket and put enough fissionable
>material in it and boom.
It is a little more complicated than that. You method would just make
a big pile of hot radioactive mess. No boom. If you put it in something
that would also evaporate, you could make a mess like Chernobel (sp?).
To make a bomb, you have to quickly cause a large number of neutrons
with the right energy level. You also have to contain it long eneough
for things to multiply before it pushes it self apart.
Making a small bomb is beyond most anyones capabilities. Making
a really large one is not as hard.
>He said it wouldn't be efficient and you wouldn't no when it would blow, I
>said who cares if you have a nuclear explosion in a major city that's
Haven't got a lot of money to drop on classic computer goodness, but I
do brew a varied and drinkable selection of beers.
OK - here are some things I'm trying to get hold of.
Cable to go between two RL02 drives
Serial printer, ideally a DECWriter of some sort ('cos it's to go on my
VAXStation SCSI cable (with the funny half-pitch pins)
Some kind of CP/M box, with a reasonably well-documented disk controller
and console (can be internal, or an external serial terminal - I'm not
Will swap for beer or toys, can collect.
I'm a little late on this thread .. it's hard to keep up.
Besides the Tech Ref manuals and the Hardware maintenance manuals, the
Sams ComputerFacts have also been helpful. I'm a big PCjr fanatic, but
I find the hardware literature from the PC, XT and AT to be helpful
because it is all very closely related.
Besides keeping the old classic cards, I look for (and hold) good
general purpose cards. Future Domain 85x series SCSI cards are a good
example; they work in eight bit systems like the PC and the software is
functional enough to drive hard disks, CD-ROMs, etc.
While we're on the topic, I've been trying to find an XT tech ref. I
want it for the BIOS listing of the hard drive adapter. This kind of
thing is useful when grafting one of the old MFM controllers onto a
PCjr. Does anybody have a source for these? (I have the Jr tech ref
and an AT tech ref, but finding an XT tech ref has been difficult.)
mbbrutman at brutman.com
has anyone tried to write a paper tape emulator in BASIC? I've had a go in
GW-BASIC, but I suspect that the implementation of the language is too slow
to reliable drive the serial port - it doesn't always pick up the paper
advance signal (I've tried using both CTS and DCD as inputs).
Will I have to go to a machine code routine to get the fast port access?
I look forward to replies.
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> At one of my usual electronics surplus stores the other day,
> they told me "If I'm into old computers.... go see this scrap
> dealer" and gave me the address. My interest was piqued, as
> it was not one I was already familiar with. So, I headed out
> there today.
And this is where? Or are you silent to protect the stash :-)
A couple of days ago several people were discussing their problems with
a couple of DG Novas. I mentioned that I had just seen one in a scrap yard
and a couple of people asked me to check on getting it for parts. I went
back there today and the Nova was still there and it looks complete.
HOWEVER the owner of the yard informed me that he is no longer selling ANY
surplus to anybody for any reason. I talked to him and found out that the
US Government is now requiring all surplus and scrap dealers to keep
DETAILED records of EVERY piece of equipment that they sell! Furthermore
they must ensure that NONE of it goes overseas. As you can imagine there's
no way that a scrap yard owner can handle the massive amounts of paperwork
that would be involved and there is absolutely no way to ensure that none
of it goes overseas. Supposedly this is coming from the Department of
Homeland Security and has something to do with 9/11. (Have you noticed that
every new, rediculous requirement is in response to 9/11?) This is a
requirement of the US Government but the owner says that a number of
independent companies are also giving him the same requirement. However he
says that it's not worth the trouble to try and keep the
government/non-government stuff separate, he's just going to destroy
everything! If this is as drastic as it sounds then I think we've seen the
end of surplus forever!
Any thoughts on this?
[Normally I wouldn't've seen this at all, since my mailer rejects
anything sent through gmail's webmail interface, because they don't
include the client IP in the headers. Someone who knows that mailed me
a copy, so this particular message I saw anyway.]
> I'm assuming that you are the same one as this :
Yes, that's me.
> I also assume that it is your web server that is no longer up ;)
I don't have a webserver, actually. My FTP server did get rather
slashdotted, not surprisingly (note that the data for 04-30 is for only
the day so far):
% cat OLD/xferlog/000 xferlog | colrm 7 | uniq -c
29 Apr 18
18 Apr 22
26 Apr 24
586 Apr 25
584 Apr 27
34096 Apr 28
216302 Apr 29
42379 Apr 30
Day boundaries in those logs are based on UTC, not my local time.
xferlog is up to some 20.3MB, and I'm hoping I've weathered the worst
of the storm.
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