Re: Early '80s Motorola Semiconductor Reference - anyone?
I found a few of the databooks here: https://usermanual.wiki/search.php?q=motorola%20semiconductor%20reference Randy From: cctech on behalf of r.stricklin via cctech Sent: Saturday, August 7, 2021 5:50 PM To: General Discussion: On-Topic Posts Subject: Early '80s Motorola Semiconductor Reference - anyone? Anyone have an early ‘80s Motorola semiconductor reference manual? I am attempting to repair a Boschert power supply from ~1983 that is full of Motorola parts marked as 1027 (DO-42ish), 1077 (TO-3ish), 1078 (DO-5ish), etc. It would be extremely helpful to know their specifications, or ideally how to cross-ref them to “standard” parts. ok bear.
r.stricklin: regarding SysV/68 and SysV/88 tapes
I have tried to reach You Raymond. Presumably You have following tape images: Sys V/68 Graphic Services Extension R3V6 XW02.10(IR06) Sys V/88 R3.2V1.2C BOS Obj UZ88.01 We are trying to build a X environment with some success already for Motorola MVME unix computers. These tapes could help. Can You comment on this (privately). BR Matti Nummi matti dot-char nummi at-char hotmail dot-char fi
Bell vs gray. The Telephone wars and invention.of telephone etc. History chan. tonight check your TV schedule.
Bell vs gray. The Telephone wars and invention.of telephone etc. History chan. tonight check your TV schedule. Sent from the all new AOL app for Android
Re: Early '80s Motorola Semiconductor Reference - anyone?
On 8/8/21 12:30 AM, Tony Duell via cctalk wrote: > Note that many of these units contain 'selected' transistors. That's > one reason for the house numbers. It may well be a 2N but one that > has been tested for some parameter. Without knowing what it was tested > for you are going to have 'fun'. That's a good point--and one I thought about mentioning. I recall chatting with some of the people who worked with Bob and their take seemed to be that early SMPSU design was half engineering and half voodoo. --Chuck
Re: Early '80s Motorola Semiconductor Reference - anyone?
Not directly useful for part number interchange, but schematic and mechanicals for the 3T series switching regulators here: http://www.rknorman.co.uk/Boschert%20PSU%20Circuit%20diagram.pdf On Sun, 8 Aug 2021 04:26:30 -0700 Al Kossow via cctalk wrote: > On 8/7/21 9:48 PM, r.stricklin via cctalk wrote: > > > Annoying, but I still appreciate the tip. I think I can get where I > > need to go with the assorted Boschert manuals on Bitsavers, if I > > put the effort into tracing mine out. > > Tony forwarded me some schematics which i've added to > http://bitsavers.org/pdf/boschert > > the OL400 from the PERQ was a nice find since their 1980's higher > wattage supplies are very hard to find information on >
Re: Early '80s Motorola Semiconductor Reference - anyone?
On 8/7/21 9:48 PM, r.stricklin via cctalk wrote: Annoying, but I still appreciate the tip. I think I can get where I need to go with the assorted Boschert manuals on Bitsavers, if I put the effort into tracing mine out. Tony forwarded me some schematics which i've added to http://bitsavers.org/pdf/boschert the OL400 from the PERQ was a nice find since their 1980's higher wattage supplies are very hard to find information on
Re: Early '80s Motorola Semiconductor Reference - anyone?
On Sun, Aug 8, 2021 at 5:57 AM Al Kossow via cctalk wrote: > > On 8/7/21 9:48 PM, r.stricklin via cctalk wrote: > > > But I should trace the thing out anyway and try to draw my own schematic, > > first. > > if you do trace it out, I'd like to add it to bitsavers. > there aren't many boschert schematics on the web > Would you also like the schematics I traced out of the Boschert OL130 SMPSU and a little Boschet 12V linear regulator? They are part of the Atlantic Research Intervew 3600 that I worked on last year. I also have the official ICL document for the PERQ 1 power supply section, which is a Boschert unit. It includes the schematic (most of it, the -ve resistance board is not included for some reason). I can try to scan it if there is any interest Note that many of these units contain 'selected' transistors. That's one reason for the house numbers. It may well be a 2N but one that has been tested for some parameter. Without knowing what it was tested for you are going to have 'fun'. -tony
