I've made a sugestion to him re testing, but his time frame seems too short
for me to find the manuals & debug via email!
Neil Morrison
email:morrison@t-iii.com
> -----Original Message-----
> From: allisonp(a)world.std.com [SMTP:allisonp@world.std.com]
> Sent: Wednesday, September 22, 1999 11:06 AM
> To: Discussion re-collecting of classic computers
> Subject: RE: OT: Semi-functional scope?
>
> > It's a relabelled Heathkit, I have a smilar one myself.
> >
> > Neil Morrison
>
> No surprize as DeVry, ICS, Bell&howell to name a few used heath for kit
> sourced equipment.
>
> Since you have one you likely the best source of info.
>
> Allison
>
It's a relabelled Heathkit, I have a smilar one myself.
Neil Morrison
email:morrison@t-iii.com
> -----Original Message-----
> From: Allison J Parent [SMTP:allisonp@world.std.com]
> Sent: Tuesday, September 21, 1999 6:46 PM
> To: Discussion re-collecting of classic computers
> Subject: Re: OT: Semi-functional scope?
>
>
>
> Likely the problem he has is twofold, lack of experice using O'scopes
> and possibly a major balance problem due to internal misadjustment or
> component failure. We also have no idea if this is a low end recurrent
> sweep 5mhz cheapie or a triggered sweep cheapie. this would influence
> what suggestions could be made.
>
>
> Allison
<There is a metal can on the back of the chassis that has a bit of rust on
<the outside, but peeking inside it looks like it is on the the transformer
Rust is not a factor unless loose bits of it are in the circuts.
<fortunately. As for the kind of cheapie it is, I have no idea... it's a
<rebadged Heathkit sold as a "Bell & Howell Schooles Oscilloscope model
<10D-4540".
I'll bet it's a cheapie recurrent sweep design. if so the H sweep should
have a switch that is marked internal/external... you want internal. There
should be a sweep rate switch as well.
lack of vertical deflection is either input set wrong, wrong gain setting
or possible a input selector switch set for grounded(to zero the input).
Heath would be a source for a manual in good likelyhood.
Allison
<By model 30, does that mean the all in one units kind of like a fatheaded
<early mac? I've got one of those with a color monitor and 286, nice little
<box, although I haven't looked inside for expansion etc.
No, the PS2/m25 and m30 were ISA the PS2/m40 and m50 286 version was MCA,
different bus. it was the m25 and m30 that were the inexpensive XT class
machines eith 3 ISA slots and a thin case (~4"). As XTs go they were
turbo (8mhz) and well made. The rest of the PS2 line was MCA bus (better)
and incompatable at the card/bus level with the then PC world.
Allison
Hi,
I had my S/3 up and running till end 1991. Then I moved house and since
then is it stored in my garage.
If you like the write small programs in macro/assembler and like to single
instruction step through it, the S/3 is the best.
In the extreme you can even single cycle the machine.
I have all IBM program listings of the OS, RPG, FORTRAN, COBOL etc etc
on microfiche. I also have the IBM program logic manuals.
I like to hack little bit in the OS.
B.t.w. are interested in a real S/3 mod 15 ?
-----Original Message-----
From: Richard W. Schauer [mailto:rws@enteract.com]
Sent: 22 September 1999 04:42
To: Discussion re-collecting of classic computers
Subject: Re: IBM System/3 owners
On Tue, 21 Sep 1999, Stegeman, Henk HJ SSI-TSEA-331 wrote:
> Hi,
>
> I am new to this list, but not in collecting old computers.
> I have since 1982 a very complete old IBM System/3 model 10.
>
> Are there any other IBM System/3 owners on this list ?
I would have been- I was told about various Sys/3x systems at a company,
and they told me I could have had a System/3 model 15D if I wasn't a few
years too late. But nice people that they were, they gave me a System/34,
a System/36 (the big 5360 kind), two 3262 printers, two 8809 tape drives,
a TDX-1050 tape controller/RS232 interface, and a Wang OIS-60 word
processing system. I've fired up the printers and the tape drives and
checked them out and I'm preparing to fire up the computers, S/36 first.
Have you run your S/3? If so what do you do with it? I've always liked
them; I have a picture of a S/3 and a S/34 hanging up at work.
Richard Schauer
Hi,
I am new to this list, but not in collecting old computers.
I have since 1982 a very complete old IBM System/3 model 10.
Are there any other IBM System/3 owners on this list ?
Thanks for replying.
Regards,
Henk Stegeman,
<> prevents rapid deflection changes. However, electrostatic deflection is
<> more limited in the achievable deflection angle, so a longer tube is
<> required.
<
<
<Also, a narrow deflection angle will improve linearity, which is
<obviously very important in a measuring instrument...
Length of the tube was a function of deflection sensitivity, minimal effect
on linearity directly. The linearity improvemnt was the flatter crt face
as a result of the larger radius.
<For anything higher you need electrostatic deflection, though. High speed
<electromagnetic deflection would involve very high voltages in the
<deflection amplifier output stages to overcome the back EMF from the
<deflection coils.
No, the inductance. You need a certain amount of current to move the beam
and at higher frequencies the inductance of the yoke is the limiting factor
in attaining that current. Faster electromagnetic scopes used very high
amperes to turns ratios to keep the inductance to tolerable levels.
For electrostatic tubes the capacitance of the plates combined with the
leads (internal and external) were less limiting though above 20mhz or so
they become very significant.
However this helps lordtyran not one bit.
Likely the problem he has is twofold, lack of experice using O'scopes
and possibly a major balance problem due to internal misadjustment or
component failure. We also have no idea if this is a low end recurrent
sweep 5mhz cheapie or a triggered sweep cheapie. this would influence
what suggestions could be made.
Allison
Anyone got a Model 32 Teletype machine they need books on?
Here's your chance. Reply to the fellow directly if interested.
-=-=- <snip> -=-=-
On Tue, 21 Sep 1999 18:49:15 GMT, in rec.radio.amateur.equipment you
wrote:
>>From: n7lxo(a)olympus.net (Charles O'Hara)
>>Newsgroups: rec.radio.amateur.equipment
>>Subject: Teletypewriter Manuals need a home
>>Date: Tue, 21 Sep 1999 18:49:15 GMT
>>Message-ID: <37e7d10d.9631922(a)news.olympus.net>
>>X-Newsreader: Forte Free Agent 1.11/16.235
>>NNTP-Posting-Host: pt194198.olympus.net
>>Lines: 18
>>Path: news1.jps.net!news-west.eli.net!news.sisna.com!pants.skycache.com!news.maxw…
>>Xref: news1.jps.net rec.radio.amateur.equipment:2111
>>
>>Have the following Teletype Corporation original technical manuals
>>available for some lucky soul:
>>
>>1. Bulletin 309B (Volume 1) which covers installation,
>>disassembly and reassembly, lubrication, and principles of operation
>>of the component units of the Teletypewriter Sets designated:
>> 32 Teletypewriter Sets
>> Receive Only (RO)
>> Keyboard Send-Receive (KSR)
>> Automatic Send-Receive (ASR)
>>
>>2. Bulletin 1210B which is the parts breakdown and exploded
>>diagrams for the Teletype Corporation 32 Page Printer Set (ASR, KSR
>>and RO).
>>
>>They are yours including Priority Mailing for only $12.00 total.
>>I'd rather see them put to use than trashed.
>>73, Chuck
-=-=-=-=-=-=-=-=-
Bruce Lane, Owner and head honcho,
Blue Feather Technologies -- kyrrin (at) bluefeathertech [dot] com
Web: http://www.bluefeathertech.com
"...No matter how we may wish otherwise, our science can only describe an object,
event, or living thing in our own human terms. It cannot possibly define any of them..."
They're gone. Thanks for the fast responses.
Wayne
>>> Wayne Smith <wsmith(a)gj.com> 09/21 4:10 PM >>>
I was cleaning my office this weekend and came across 9 copies of the 9/95 issue of BYTE (don't ask why), the 20th anniversary issue. If anyone wants 8 of them (I am keeping one) I will front the postage to see that they get a good home. I will not split these up. There's a lot of interesting historical information in this issue for those who haven't seen it before. 20 most important chips, 20 most significant systems, 20 biggest flops (e.g. Lisa, PC jr.), etc.
Wayne
About 2 years ago a friend of mine gave me a "Bell & Howell Schools"
scope. I put it in my basement for a few years until I've had time to look
at it. A friend guided me through the alignment over the phone so I get my
dot centered on the screen. But I can't get it to start (is sweeping the
word?) I just get the dot. Turning the controls to any place other than
where he told me results in the dot falling off the screen (to the left
usually). I've tried to get results by connecting low-level audio sources
including music and white noise, but still nothing on the display other
than the dot. Any ideas? I need to have it working by 3rd period Friday
because my friend is bringing an Arp 2600 analogue synthesizer to my
chemistry class to demonstrate different wave forms and it will be a lot
more effective if we can demonstrate the different waves if theyc an be
seen.
Oh, I forgot to mention that when I opened it up, there was a REALLY long
CRT (I'd say more than 1.5 feet) that ran the entire length of the
cabinet. Other than a bit of a rusty shield under one of the went holes,
it was REALLY clean on the inside... but had several spider webs and dead
insects. How something can be home to little creatures but not get dusty
is quite beyond me... the only openings are the vent holes in the top,
which are long skinny things that shuold have let it all the dust...
Thanks,
Kevin
