Hi
Nasty of them to do that. Maybe make a motor generator :)
Dwight
>From: "Steve Thatcher" <melamy at earthlink.net>
>
>AMC used a resonant transformer in the Em series. It has no primary taps on
>it for switching voltages. It also needs to run at the required frequency.
>Joe's first thought of scavenging the transformer (and cap) from other box
>is the only way to go.
>
>best regards, Steve Thatcher
>
>At 08:07 PM 02/25/2005, Dwight K. Elvey wrote:
>> >From: "Joe R." <rigdonj at cfl.rr.com>
>> >
>>---snip---
>> >
>> > I also found another Applied MicroSystems microprocessor Diagnostic
>> >Emulator unit. These one is an EMM-188 for the 8080 and 8085 CPUs. I also
>> >got an EMM-188 pod with it for testing 8080 circuits. It appears to be in
>> >new condition, there's just one problem, it's wired for 220VAC 50Hz! I also
>> >got the original fitted case for it but it has a problem too. The interior
>> >was made of that foam that likes to turn to goo after a while! It took a
>> >bit to get everything cleaned up! Anybody know what it takes to convert one
>> >of these back to 110 volts or do I just swap the xformer out of one of the
>> >podless ones that I have?
>> >
>> >
>>
>>Hi
>>1. Use another transformer of about half the core weight as
>>an autotransformer to step the voltage up to the 220V. This
>>doesn't have to be a 110 in to 220 out full transformer, just
>>one that has the split primary. You only use the primary.
>>2. Look to see if the transformer already has two primary windings
>>that can be arranged for 110v.
>>Dwight
>
>
>
I just picked up a lk201 keyboard today that wouldn't work with a vt320
Unlike my other lk201's this one has blue strip across the top, an orange pf1
key, f20 is labeled Hyph Push
PN: LK201BA
One site selling them says it is a word processing keyboard.
red lights and an error 4 on a VT 330.
How many variations of LK201 were produced?
Are they interchangeable?
Also heard about a PLATO system now online, I'm waiting for more details.
--
Collector of vintage computers http://www.ncf.ca/~ba600
Machines to trade http://www.ncf.ca/~ba600/trade.html
Open Source Weekend http://www.osw.ca
ard at p850ug1.demon.co.uk (Tony Duell) wrote:
> I have no bits of paper for computing (or
> electronics for that matter) at all.
But you have a Ph.D., don't you? What is it in? Physics?
MS
Okay, why not...
Born in 1968, currently 36. First regular interaction was
with an Apple ][ in about 1980-81, and some time on ASR33's
talking to an unknown DEC BASIC timesharing system run by
the Philadelphia public school system. Got an Apple //e in
highschool.
College brought a VAX-11/750 running VMS4.4 in late 1986;
and Macs, Zenith IBM-clones, DEC Rainbows, and when I was
allowed to visit the Inner Circle assorted S-100 gear. For
one project I did a paper design (circuit and ucode) around
the 74181 ALU, maybe someday I'll dust it off and actually
build it.
Didn't finish my degree before I got a job at MIT, as part
of DECs ESL agreement - "hire a couple people, stop calling
our support staff all the time, and we'll give you huge
discounts." So it was mostly VMS and Unix support, noodling
around on everything from MVIIs to 8800s. But I also wound
up with a Sun-3/60 on my desk for duping tapes under their
license program, and answered a lot of questions about them
too. Every now and then I got a treat and someone would
call me to look at a problem with their SGI gear...
Lots of things since, but this is getting long.
Not much discipline to the collection. DEC stuff (pdp-11,
vax, alpha), Moto m88k, Nat Semi 32k, CompuPro S-100, and a
couple Apple 8 bitters.
--Steve.
Born 1973, currently 31.
First experience/sight of a computer was at around age 9-10 at primary
school, when the class got to use a loaned BBC 'B' for a day. I was hooked
there & then.
I didn't see another computer until I went to secondary school. The
computer lab there had: about 8 ZX Spectrums in a network (of sorts), 1 BBC
'B' (which spent most of its life playing Revs), and one Sharp MZ-80K
(which I acquired a few years later).
Sometime between 1982 and 1985, Dad had an Apple ][ Europlus on loan from
works; he learned DBase, I learned Apple Basic - which I've long since
forgotten. I do recall a rather good helicopter game though (one rescued
soldiers or somesuch from burning buildings. Also a flight simulator game,
which ate many a child-hood hour.
In February 1984, Dad ordered a Sinclair QL, which eventually showed up in
about June or July. I used that in its barebones 128k twin MDV setup for
about seven years, before finally buying disk drives (Well, a 5.25" single
drive), then extra memory, then a Gold Card, then twin 3.5" drives, before
finally retiring it for good in about 1994. I still have that QL, & most of
the accessories I ever bought/acquired.
Between 1986 and 1990 - I have long forgotten the actual dates, and I
almost forgot the actual machine! - I owned a ZX Spectrum - which I later
swapped for a CBM Plus/4 + games. During the same period, I had a BBC 'B'
on loan; with a very flakey keyboard connector which I eventually had to
replace myself, using ordinary stranded ribbon cable. Euch. It never was
quite the same after that.
At sometime between 1990-1992, someone (I never met them) asked me to write
some software on a Commodore PET 8032SK; I got to play with the complete
system (it included an 8040(?) double drive unit & printer). Around this
sort of time I made the fatal error of selling the Sharp MZ-80K for ?10 to
a mate. Oops. The PET system eventually went back to its owner in about
1993 (I think) - software un-written.
In 1994, I finished college & went to work, starting on a 486DX33. I got my
own PC the same year (a DX2/66), and have used PCs to work on ever since.
My classic comps collection, though, didn't really get going until 2000,
when I bought another QL. And another one.... I have about 7 now. Also a
BBC B, a BBC Master, a Spectrum or 4, a ZX81, a pair of Osborne 1's, a
collection of PETs (including an 8032-SK), a pair of MZ-80K's, 2 -80A's and
an -80B, and so on.
Big iron wise, I would covet a Vax 8800 (as used at N. Staffs Polyversity),
but have to make do with an HP 1000F & an A700.
So there you go... I am currently slimming down my oversized collection
somewhat, as it's getting to be a PITA to haul around everytime I move
house (4 times in 5 years so far).
Cheers,
Ade.
Many years ago when a EGA monitors were new, we had a
Professional photographer take product shots of our DOS
base software. He set up the PC in a room where he could
turn off the lights, He took 3 second exposures of the
screen then fired a strobe to get the computer case.
I have found the long exposures give good results.
You need a tripod.
Simple point and shoot digital cameras don't allow for
an external strobe. I have used two methods to get around
this. Turn down the lights (turn off the flash) and
take a picture of the screen. Use a normal or dim
brightness setting on the montior. Turn up the lights
(or tun on the flash) and take a second picture of
the complete system. Use a photo editing package to
merge the two images.
http://www.swtpc.com/mholley/CT_1024/CT1024_Index.htm
I have also adjusted the lighting to low level and taken a single shot.
http://home.comcast.net/~swtpc6800/CT_1024_New/CT1024_ebay3.jpg
I am currently selling this SWTPC CT-1024 TV Typewriter on eBay.
(item number: 5169085449.)
I have 4 working TV Typewriters, I need some room for new projects.
Michael Holley
www.swtpc.com/mholley
Hi
Born in the year of the transistor.
My first programming experiences were 6800 and 8080 machine
code. I then went on to use PLM-80, a little PASCAL and BASIC.
My first computer was a Poly-88 that I bought used for $400.
I was one of the ones that went to the West Coast Computer
Fair to buy my first floppy drive. While there, I picked
up a listing of Forth. Up to that time, writing large programs
was a mystery to me. How was it that one could use something
like BASIC to actually do something significant. Forth taught
me how to factor problems and because of its natural flow
to create significant programs on the fly.
For a long time, I tried to convince people how right Forth
was compared to other languages. I've since come to realize
that people all think differently. Some like the comfort of
natural languages ( BASIC ) while others like the compactness
of programs ( APL ). Some feel that millions can't be wrong ( C ),
while others like to explore the abstract ( SmallTalk ).
I just like to get working programs as quick as I can so I
can fiddle some more with the hardware. Each to their own.
Dwight
Hi,
I don't seem to have received any messages since Saturday - is the list down, or is it my ISP?
Thanks
Jim.
Please see our website the " Vintage Communication Pages" at WWW.G1JBG.CO.UK
I was born on July 24th, 1938. If I am not the oldest member,
then someone else will have to answer - unless I missed your response.
By the way, what is the current (unique) list count: cctalk / cctech?
Remember that I am a software addict (as opposed to 95% who are
hardware addicts) using MACRO-11 under RT-11.
My first system in 1960 was the IBM 650 (which has been discussed
recently) using SOAP (Symbolic Optimal Assembly Program) as the
name of the Assembly Language. The optimal referred to the location
of the instructions on the drum which were placed in the next available
location on the drum so that the instruction was available ASAP after
the previous instruction was finished. The drum size was 2000 words
of 10 decimal digits - or about the equivalent of 20 KBytes.
I probably used the IBM 1620 in 1961 with assembler.
I seem to remember the Univac 1107 in 1963 with FORTRAN.
The IBM 7094 arrived in 1965 with FORTRAN and assembler.
Then came the CDC 3300 in 1967 with assembler.
The next 5 or 8 years are a bit of a haze. The CDC STAR-100
was included during that time period using assembler and MALUS.
I seem to remember about 1 MByte of core memory and a program
address space of 32 TerraByes (with a 48 bit address). I can't
remember the disk drives at all.
The PDP-11/05 seemed to arrive around 1975 with MACRO-11 under
V02.? of RT-11. The disk drive was a DEC RK05 with 2.5 MBytes
per removable media. I think the memory was 32 KBytes of core.
Although I occasionally used a VAX after that, I seem to remember
running RT-11 on a PDP-11 of some kind ever since 1975.
At present I have many Qbus PDP-11 systems available with most
not assembled. If I ever get the energy, there are probably enough
parts to put together about 2 dozen Qbus PDP-11 systems, mostly
PDP-11/23 and PDP-11/73.
I still design and write programs, mostly in MACRO-11. But lately, I
tend to run RT-11 under an emulator since the emulated features are
much better than the real DEC PDP-11/83 that is still available.
Sincerely yours,
Jerome Fine
--
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