MTM Scientific (Clinton, MI) offered modern redrawn IBM PC 5150 base board
and a Full Kit, at one time.
https://www.mtmscientific.com/pc-retro.html
While he is no longer selling separate blank 5150 boards,
you could inquire about Gerbers.
greg
w9gb
Viewsonic 22 inch VX2262wm widescreen LCD
VGA up to 1680 x 1050 resolution, VIDEO Response as fast as 2ms.
Viewsonic LCD VX2262wm (brochure)
https://www.viewsonic.com/eu/products/sheet/VX2262wm
===
It was apparently indeed in a self-test mode.
When I fed it, it actually worked well.
When I loo
It has been a long-time (almost 40 years now) since I worked part-time at an
IBM dealer, BUT attended ALL the IBM hardware training (and later as an early
corporate PC center manager), including the wonderful OS/2 presentations.
I also selected that IBM model for my father’s business software, w
Curious Marc has a complete set of YouTube videos on his restoration
of the HP 9825, due to Power Supply failure (no crowbar) damaging a number of
ICs.
The Last video of the series shows fabricated of the PC Board for
it’s missing Crowbar Circuit.
https://youtu.be/gIfJ30fPAOw
HP 9825 Crowbar Pr
Power Supplies, due to their Weight, are placed at the bottom of Racks (prevent
tip overs / weight distribution).
https://avitech.com.au/?page_id=366
The PDP-11/70 Maintenance and Installation Manual (EK-11070-MM-002) explains
that the basic PDP-11/70 system components are located in a double ca
Power Supplies, due to their Weight, are placed at the bottom of Racks (prevent
tip overs — weight distribution).
https://avitech.com.au/?page_id=366
The PDP-11/70 Maintenance and Installation Manual (EK-11070-MM-002) explains
that the basic PDP-11/70 system components are located in a double ca
Al -
The Texas Instruments (TI) 139 is likely a 2N139 PNP (BJT) transistor,
capable of high speed switching (in that era).
The 2N139 was originally an RCA transistor (tall cylinder) found in RCA and GE
transistor radios (455 kHz IF section).
The TI versions were low profile metal case, TO-33 ca
Ken Gielow sold his Z80DIS (Z80 disassembler) for CP/M 80 as shareware ($20)
thru his Butler, PA firm (SLR Systems), until the end of the 1980s.
I left Slippery Rock (just north of Butler) in the summer 1983 (about time of
release).
—
Info World, October 24, 1983
Software Review by Steve Mann
htt
The recently acquired a Memorex Telex IDE ISA controller (early 1990s),
number 711186669587 , that has an unpopulated floppy / tape controller area on
the board. The board has 34-pin internal header and DC-37 for external drive.
I would like to populate those missing components on the PC board.
Phil -
Search for Push-In Rivets (plastic, nylon, etc.).
Two of the largest mfg. of plastic Push Rivets are just east (Richco, River
Forest, IL) and north (Fastex, Des Plaines, IL) of me. Both have been acquired
by larger conglomerates.
—
Richco (River Forest) was bought by Essentra Components
Sean -
You might get lucky, IF Jameco still has documentation & software for the board.
I would guess circa 1982-1985 (after IBM XT introduction with 256 kB standard).
—
Japan in 1970s and Taiwan in 1980s ... had major production issues with PCB
fabrication and assembly (required higher QC in sour
BTW -
IF you look at advertisements in the 1985-86 PC magazines, this was typical:
PC Network (Mail-Order/Telephone reseller).
PC NETWORK SIX-PACK“ CLONE with 0K $89.00*
Full Six-Pack“ Features —Game Port Standard. Direct Import from Taiwan at a
Fabulous Price!
==
The “unknown” is whether the
Sean, Fred, and Glen —
Sorry, late to this ISA card thread.
I worked in Tech Support for an Apple/IBM/HP/Novell retail computer dealer,
during summers in early 1980s, when in Graduate school.
So I saw the “wide selection” of add-in cards for IBM PC/XT and compatibles.
==
This is a “Taiwanese gene
As noted, in another reply, the DEC VT-5xx terminal series was mfg. by ADDS.
Boundless Technologies (former ADDS) shutdown sales a few years ago.
They will service & supply parts, as long as inventory of proprietary parts
exists.
http://www.boundlessterminals.com/
Boundless Technologies
1916 Sta
Rob -
It has been 35+ years since I worked for an Apple dealer, during the Macintosh
announcement (and Apple sales, service training). I no longer have any of
those documents.
The Apple Community is extensive, and a quick Google search turned up many
comments about Flyback, Damping Diode, &
Tai-Ho (Taiwan) was the OEM supplier for flyback transformers used by Apple in
the early Macintosh computers (1984+).
Russell Industries (New York, USA) produced replacement flyback transformers
for monitors and TVs, these appear on eBay and remaining TV repair supply
houses.
As noted, while t
Rob -
A DEC Part Number would speed up your Part Search.
Radwell, a surplus dealer in New Jersey, lists a DEC terminal Flyback
Transformer.
DEC Part number: 16-27975-01 (supposedly used in the DEC VT320 terminal)
https://www.radwell.com/en-US/Buy/MONITOR%20TECHNOLOGIES/MONITOR%20TECHNOLOGIES/1
Some days I feel like “Doc Brown”, wondering where I parked the DeLorean.
—
YES ... connecting your HP 9000 to your private LAN would be useful.
ThinNet = 10-Base-2 = 10 MB Ethernet over RG-58/U 50 ohm coaxial cable.
The Series 360 workstation should also have an AUI port (15-pin D-subminiature
w
Mike -
Cer-Comp
5566 Ricochet Avenue
Las Vegas, NV 89110
(702) 452-0632
William E. Vergona wrote firmware on those two (2), 2708 ROMs.
He later (1980s) worked with Tandy (Coco-3) Color Computer products.
==
‘68 Journal, May 1980 (Back to Future, 40 years later)
MiniDisk+ DOS , Pages 11 - 13
http:/
Harris still manufactures the RCA/Intersil/Harris 1802 processor.
I do not know if the Silicon on Sapphire (SoS) process versions (Sandia Labs,
radiation hardened) are still used by DoD.
https://en.wikipedia.org/wiki/RCA_1802
Alltronics
Harris CDP1802ACE (3.2 MHz, 5 Volts) $4.95
https://www.allt
Jack Ward would be happy to include in the museum collection.
http://semiconductormuseum.com/Museum_Index.htm
Helped Jack over a decade ago, to document the usage of transistors in Explorer
I. He did oral history interview with Dr. George Ludwig before he passed in
2013.
http://semiconductormus
I did find a candidate switch, at Surplus Sales of Nebraska for $5.00
http://www.surplussales.com/switches/SWToggle-1.html
(SWT) 8V10128
Microswitch SPDT toggle switch. 25 ma @ 20vDC. PC mount. ON-ON. 0.5" x 0.9"L
Blue Paddle.
Microswitch Co. was started by Burgess Battery (Freeport, IL) in 1930s
Electronic Surplus
Cleveland
https://www.electronicsurplus.com/
Honeywell switch, might work with your actuator
https://www.electronicsurplus.com/honeywell-microswitch-8v1012b-m-switch-rocker-spdt-25ma-20vdc
gb
Sent from iPad Air
Many of the classic Rocker & Lever Actuator switches from the 1960s & 1970s
were discontinued, due to industry consolidation (M&A) in 1990s and the convert
or obsolete decisions (RoHS compliance), a decade later.
This likely means you will need to “adopt” to current offerings == OR ==
plow thr
Beautiful front panel (1970s design).
It would make a nice front panel for a DIY Computer.
—
It is an RS-423 control/switch panel.
RS-423 is an EIA/TIA serial communications standard, BUT there is no common
pinout (standard) for RS-423.
==
RS-232 was defined in 1962 by the Electronics Industr
Adrian -
ASTEC is now owned by Emerson Power (UK address below).
Emerson Power Catalog (find the 57 watt models):
https://www.mouser.com/catalog/supplier/library/pdf/Emersonpower_catalog.pdf
PowerClinic in Dallas/Fort Worth area
services a large number of Switch-Mode power supplies.
http://porta
In 2015 the content of N8VEM projects were migrated to RetroBrewComputers.org
(RBC).
https://www.retrobrewcomputers.org/doku.php
Active support for N8VEM and later RBC projects found at RetroBrew Computers
Forum.
https://www.retrobrewcomputers.org/forum/index.php?t=thread&frm_id=1&;
The N8VEM
Card Edge Connectors are PC Board to Wire Connectors. The 34-pin version was
popular for control board on 5-1/4” floppy drives in 1980s.
https://en.m.wikipedia.org/wiki/Edge_connector
I have not seen commercial PC board widgets used as an interconnect.
gb
==
Date: Tue, 27 Nov 2018 14:56:18 -050
Josh -
You may want to contact Denis Kohlhagen, at Butler Winding. IF this is for the
preservation of an HP terminal in the museum, they may wish to assist in
rebuild/rewinding that flyback. There are US firms that can perform this work,
and publicity of preserving history is desired by some
Grant -
Occasional vague references to “I”, when Ethernet II was used (as I remember).
I assumed the reference was for initial 3 Mbps work at PARC.
Gateway Communications started in Irvine, CA (1981?) offering G/Net (~double
the 3 Mbps), I remember installing their demonstration system (1982 or 1
Not exactly. The TL-5242 is more than 3 times the price and chemistry
difference.
I assume you do not desire to replace the Lithium Coin Cell ? or can’t find?
Tadrian TL-5242-W Lithium battery
https://www.mouser.com/ProductDetail/Tadiran-Batteries/TL5242W?qs=Yk42LiOZU8T3HaRcWXYg9A%3D%3D
Data sh
Agree about Varian trademark.
In 1937 the Varian brothers developed the Klystron tube.
In 1965 Eitel-McCullough (EIMAC) merged with Varian Associates, but in 1995 the
EIMAC division was “spun off” (now part of CPI).
In 1999, the company was reorganized into three distinct businesses:
Varian Medic
CM73 is preferred, due to its ~ 15,000 hour operating life.
CML Datasheet
http://www.farnell.com/datasheets/9986.pdf?_ga=2.221200730.354234894.1497893544-1697820496.1468261067
gb
Sent from iPad Air
Incandescent Lamps
Determine BASE Type and Voltage.
Additional criteria: Filament type; brightness; expected hours (life)
Chicago Miniature Lighting (CML)
https://www.cml-it.com/
> Hi everyone,
>
> Can anyone suggest a source of replacement indicator bulbs for an RL02 drive?
> Are they fairl
The High Voltage capacitors 600 to 2,000 VDC have a finite life.
Unless you checked for leakage or ESR be suspect of values in range.
Since you are in the UK, Farnell/element14 may be the best parts distributor.
ASC Metalized Polyester Film, 6 kVolts
http://www.justradios.com/ASCcapacitors.h
For your education, Google search "Flyback transformer"
There are a number of rebuilders, replacements, and substations.
B&H Electronics
https://www.bhelectronics.com/products/dc-dc-power-products/isolated-flyback-transformers.html
Pactran
http://pactran.com/why-pacific-transformer/?gclid=CNWWzL
Paul,
Are these the "offset clip" RJ-12 6p6c modular jacks?
https://www.showmecables.com/dec-rj12-6p6c-modular-plug-flat-cable
greg
chicago
Sent from iPad Air
Just threw out all of my HP/UX v9 training manuals from that era, last year.
Reliable machine for the era when Intel 80386/80486 were the top processors.
greg
Sent from iPad Air
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