Re: hp 9145 capstan replacement
I was going to mention him too but you beat me to it. He does really great nice work. I've had a few QIC drive rollers replaced through him. http://www.terrysrubberrollers.com/ -Kurt On Fri, Apr 23, 2021, 20:32 Chuck Guzis via cctalk wrote: > On 4/23/21 8:11 PM, Curious Marc via cctalk wrote: > > I tired several methods which worked to some extent (afore mentioned > silicone tubes, shrink wrap, eBay bought molded rubber overwraps, machined > grooves and add O-rings), but now I just strip my capstans clean and coat > them with plasti-dip. Methods in shown my various videos (like here > https://youtu.be/cTZCD4OXETk ). Only plastidip and o-rings have been > durable enough in the long run, and plasti-dip is easier. I have not done a > capstan this large though. There are also some folks out there that will > also commercially recoat a capstan with correctly molded and vulcanized > rubber. > > Marc > > In the past, I've used this guy: > > http://www.terrysrubberrollers.com/ > > Top-notch work. > > --Chuck > >
Re: DEC PDP-11/45 backplane +5 ECO
> PS: I wonder how many people here have -11/45's? ISTR one other, but they > aren't > common. I do. -tony
Re: DEC PDP-11/45 backplane +5 ECO
> From: Fritz Mueller > could I ask that you take some closeups around the Mate-n-Locks along > the top? I'd be very interested to see the board traces and the details > of the red bus wiring there. I had a look at my /45 (a later KB11-D - although I think the backplanes for the -A and -D are identical), and it seems to have heavy red wires attached to the upper row of Mate-n-Lok's that look just like those on Josh's. I'd really want to take pictures of mine (I don't want to take the backplane out - too much work - but I can get decent images with it in, I think) so I can compare them directly, though, not depend on visual memory. Noel PS: I wonder how many people here have -11/45's? ISTR one other, but they aren't common.
Re: DEC H742a Power Supplies, for Parts (Seattle)
On Sat, Apr 24, 2021 at 12:37 PM Ethan Dicks wrote: > On Sat, Apr 24, 2021 at 2:51 PM Josh Dersch via cctalk > wrote: > > Fans are dead (either melted away entirely or rusted > > out). > > Are any of those melty fans Boxers? I'm still looking for a circlip > to put a Boxer back together for an Omnibus box (for those that > haven't heard the story, I was cleaning and lubing a fan and the clip > leaped to freedom, never to be found). > Thanks for reminding me, I'll take a look. There look to be three Boxers in the upper supply (which didn't melt but are very rusty). If they match what you need, I'll see if I can liberate some circlips from them. I'll also pull off the mounting bracket for the front panel for you. I think it may be the only salvageable part from it (unless anyone needs an aluminum light mask from an 11/45 front panel). - Josh > I sent a picture before of the fan type and of the circlip. I can > resend if needed. I don't need the entire fan, just that one tiny > metal part. > > -ethan >
Re: DEC PDP-11/45 backplane +5 ECO
On Sat, Apr 24, 2021 at 1:36 PM Fritz Mueller via cctalk < cctalk@classiccmp.org> wrote: > Hi Josh, > > Among the pictures linked from your message about the H742a parts, there > is one picture of you backplane. I have been looking for some time for > information about the following 11/45 ECO: > > > KB11-1 CODE: D May-72 [ECO] > > > > Problem: Etch carrying +5V current from Mate-n-Lock pins to backpanel > pins is not heavy enough to carry required current. Correction: Run 24AWG > wire in parallel with etch on panels which already have Mat-n-Lock assembly > installed. Increase thickness of conductor with solder bead if Mate-n-Lock > assembly not installed. PDP-11/45 system serial number 101 and later. > > The wiring arrangements at the top of your backplane look to be a bit > different from mine, and I believe you may have this ECO implemented. > While you have your backplane out, could I ask that you take some closeups > around the Mate-n-Locks along the top? I'd be very interested to see the > board traces and the details of the red bus wiring there. > For sure. I have it on a shelf in the garage to keep it relatively safe while it's out of the chassis, next time I'm out there I'll take some pictures. > > Pictures of the toasted 11/45 suggest that the original machine had the > older power wiring scheme (distribution panel mounted vertically on back of > cabinet instead of horizontally at top of cabinet, etc.) although your > KB11A serial number badge is >2000, which is curious... Yes, I was looking at the service docs and it does seem to match the earlier wiring scheme. If you have notes on re-creating the harness, let me know. The molex shells actually survived the heat (with a couple of exceptions) so I should be able to reuse them. Looks like I'll just need to order up a ton of wire and pins (and a crimper, probably). I'll get the 15V boards out of the H742's this week. - Josh
Re: DEC LK201-AA removable feet dimensions?
On Mon, Apr 19, 2021, at 6:19 PM, Rick Murphy via cctalk wrote: > Height 27.38 mm (1.07 in) > Diameter 13.36 mm at the base (closed end), 13mm at the open end (hard > to measure as it's easily deformed). > Ear slots 5.5 mm wide > Ears 2.17 mm wide, 11.3 high (the tooth-shaped part only). > -Rick Thanks so much, Rick, I greatly appreciate it! I'm going to try building one in OpenSCAD and printing them out. I'll let the list know how it goes. -Seth -- Seth Morabito Poulsbo, WA w...@loomcom.com
Interesting Exidy peripheral
Earlier I'd found a box with a speaker, what looked like a volume control and maybe a headphone jack with a ribbon cable going to a DB-25 connector. Thought it might be for playing sounds from the system. Appears to be partly right. While digging through various Exidy doc on Bitsavers I came across a manual for a Cognivox Speech Recongnition and Voice Response Peripheral by a company called Voicetek. The images in the manual match the box itself. What I thought was a headphone jack is for a mic and it appears to plug into the parallel port in the expansion unit. I haven't found any of the software that the manual says ships with it though I'm still finding parts of this system packed away in various boxes so might find it yet. I know it is probably a huge long shot but if anyone else has software or anything else about this peripheral, please drop me a line. David Williams www.trailingedge.com
Re: Need a BASIC expert
On Wed, Apr 21, 2021 at 5:19 AM Bill Degnan via cctalk < cctalk@classiccmp.org> wrote: > It is not too hard to imagine a professional programmer who took a copy of > Dartmouth BASIC and adapted it for this flavor of BASIC, but I personally > dont have any reference docs about it or proof. > [...] > so it may > simply be MINICAL BASIC would have been just as easy for a period > programmer to whip up from scratch. > The latter seems far more likely. From what little is known about it, the MINCAL architecture is apparently very dissimilar to the GE-225/235/265 or GE-635, e.g. the MINCAL being a BCD machine, so I'd expect it would have been much easier to write a new BASIC interpreter for the MINCAL from scratch than to adapt it from actual Dartmouth BASIC. Are there any known actual "ports" of Dartmouth BASIC to non-GE/Honeywell machines, as opposed to scratch reimplementations?
DEC PDP-11/45 backplane +5 ECO
Hi Josh, Among the pictures linked from your message about the H742a parts, there is one picture of you backplane. I have been looking for some time for information about the following 11/45 ECO: > KB11-1 CODE: D May-72 [ECO] > > Problem: Etch carrying +5V current from Mate-n-Lock pins to backpanel pins is > not heavy enough to carry required current. Correction: Run 24AWG wire in > parallel with etch on panels which already have Mat-n-Lock assembly > installed. Increase thickness of conductor with solder bead if Mate-n-Lock > assembly not installed. PDP-11/45 system serial number 101 and later. The wiring arrangements at the top of your backplane look to be a bit different from mine, and I believe you may have this ECO implemented. While you have your backplane out, could I ask that you take some closeups around the Mate-n-Locks along the top? I'd be very interested to see the board traces and the details of the red bus wiring there. Pictures of the toasted 11/45 suggest that the original machine had the older power wiring scheme (distribution panel mounted vertically on back of cabinet instead of horizontally at top of cabinet, etc.) although your KB11A serial number badge is >2000, which is curious...
Re: Exidy S-100 Expansion cards questions
On 2021-04-24 15:01, Brent Hilpert via cctalk wrote: I take it you haven't found s100computers.com. Info for the Compupro Interfaceer II is readily available there, with scan of original manual with schematic. http://www.s100computers.com/Hardware%20Folder/CompuPro/Interfacer%20II/Interfacer%20II.htm Mem Merch 64K and Jade FDC are listed there as well, I haven't looked below the link level for them though. There used to be another S100 site under maben-something but it seems to have vanished. It was a lot of duplicate with S100computers but had some additional stuff. No I hadn't found that site yet, thanks! I knew of the maben site but haven't been able to access it for some time so figured it was gone now. Anyway, thanks for the pointer. That takes care of the cards, now just need to find info on the expansion box itself. This was a pretty complete Exidy setup it would appear. Came with the Sorcerer, the expansion box, monitor, some drives. Bunch of cassette tapes and what appears to be a speaker box of some sort with what I assume to be a volume control on the side with an possible headphone jack and a ribbon cable with a DB-25 coming out of it. David Williams www.trailingedge.com
Re: DEC H742a Power Supplies, for Parts (Seattle)
> On Apr 24, 2021, at 11:50 AM, Josh Dersch via cctalk > wrote: > There were two H742a supplies in the rack... I hate to see things go to > waste... > ...the power supply boards look like they might be usable after a good > cleaning and testing. Hi Josh, I have H742a's running in my '11/45, so I'd be happy to give the controller boards a good home in my spares cache if nobody else speaks up with a more immediate need for them. cheers, --FritzM.
Re: Exidy S-100 Expansion cards questions
On 2021-Apr-24, at 12:43 PM, David Williams via cctalk wrote: > Moving forward on setting up my collection and I was taking a look at an > Exidy Sorcerer S-100 Expansion box I had received long ago. I wondered if > anyone could help with info on the cards I found inside. The first is clearly > a memory card but not familiar with the company. The second is a disk > controller and the third is a parallel/rs232 interface. I haven't found any > doc on any of them yet. If you have doc or info on the cards or anything else > about the expansion box please let me know. Haven't tested or done any more > with it yet other than open it up and look around inside. Had this for ages > but only now had room to take it out of the box. > > 1) 64K Static Memory card copyright 1981 Memory Merchant > 2) Double Disk controller by Jade Computer (Doesn't seem to match the image > on the doc I found on Bitsavers for their Double D controller but suspect it > is one) > 3) Interfacer II Triple Parallel / RS232 Serial I/O from CompuPro - Godbout I take it you haven't found s100computers.com. Info for the Compupro Interfaceer II is readily available there, with scan of original manual with schematic. http://www.s100computers.com/Hardware%20Folder/CompuPro/Interfacer%20II/Interfacer%20II.htm Mem Merch 64K and Jade FDC are listed there as well, I haven't looked below the link level for them though. There used to be another S100 site under maben-something but it seems to have vanished. It was a lot of duplicate with S100computers but had some additional stuff. > Links to pics below. > > http://www.trailingedge.com/images/ExidyS100-1.jpg > http://www.trailingedge.com/images/ExidyS100-2.jpg > http://www.trailingedge.com/images/ExidyS100-3.jpg > http://www.trailingedge.com/images/ExidyS100-4.jpg > http://www.trailingedge.com/images/ExidyS100-5.jpg > http://www.trailingedge.com/images/ExidyS100-6.jpg > http://www.trailingedge.com/images/ExidyS100-7.jpg > http://www.trailingedge.com/images/ExidyS100-8.jpg > http://www.trailingedge.com/images/ExidyS100-9.jpg
Exidy S-100 Expansion cards questions
Moving forward on setting up my collection and I was taking a look at an Exidy Sorcerer S-100 Expansion box I had received long ago. I wondered if anyone could help with info on the cards I found inside. The first is clearly a memory card but not familiar with the company. The second is a disk controller and the third is a parallel/rs232 interface. I haven't found any doc on any of them yet. If you have doc or info on the cards or anything else about the expansion box please let me know. Haven't tested or done any more with it yet other than open it up and look around inside. Had this for ages but only now had room to take it out of the box. 1) 64K Static Memory card copyright 1981 Memory Merchant 2) Double Disk controller by Jade Computer (Doesn't seem to match the image on the doc I found on Bitsavers for their Double D controller but suspect it is one) 3) Interfacer II Triple Parallel / RS232 Serial I/O from CompuPro - Godbout Links to pics below. http://www.trailingedge.com/images/ExidyS100-1.jpg http://www.trailingedge.com/images/ExidyS100-2.jpg http://www.trailingedge.com/images/ExidyS100-3.jpg http://www.trailingedge.com/images/ExidyS100-4.jpg http://www.trailingedge.com/images/ExidyS100-5.jpg http://www.trailingedge.com/images/ExidyS100-6.jpg http://www.trailingedge.com/images/ExidyS100-7.jpg http://www.trailingedge.com/images/ExidyS100-8.jpg http://www.trailingedge.com/images/ExidyS100-9.jpg Thanks. David Williams www.trailingedge.com
Re: DEC H742a Power Supplies, for Parts (Seattle)
On Sat, Apr 24, 2021 at 2:51 PM Josh Dersch via cctalk wrote: > Fans are dead (either melted away entirely or rusted > out). Are any of those melty fans Boxers? I'm still looking for a circlip to put a Boxer back together for an Omnibus box (for those that haven't heard the story, I was cleaning and lubing a fan and the clip leaped to freedom, never to be found). I sent a picture before of the fan type and of the circlip. I can resend if needed. I don't need the entire fan, just that one tiny metal part. -ethan
DEC H742a Power Supplies, for Parts (Seattle)
Hey all -- I've started stripping down the "fire-sale" PDP-11/45 I picked up in November, in preparation for sanding and repainting the rack and processor chassis. There were two H742a supplies in the rack that I believe are too far gone to be reasonably restored (in particular the heat definitely did a number on at least one of the transformers) and I have a pair of H7420a's ready to take their place. I hate to see things go to waste, though, and even though it's probably pointless -- before I send these off to the scrapyard, I wanted to check to see if anyone here needed any parts. Shipping the whole unit(s) would be pretty expensive, local pickup is an option if you want the whole thing(s). The transformers are a bit toasty but the power supply boards look like they might be usable after a good cleaning and testing. Fans are dead (either melted away entirely or rusted out). I suppose there's not really much else that'd be useful to anyone but I have a compulsion to make sure... Here's a couple of pictures: https://1drv.ms/u/s!Aqb36sqnCIfMpL89R2GtJFrrRqZ1vQ?e=Re3KZr And for fun, here's a bunch of pictures of the unit just prior to the teardown: https://1drv.ms/u/s!Aqb36sqnCIfMpL8-mTCp-NndzDTpbw?e=8aWCl4 (I do think there's a good chance this will run again, the major casualties were the front panel, power supplies, and wiring harness. I have replacements for the first two, and the third is just a matter of taking the time to build a new one. The boards cleaned up nicely and there's no real damage to the processor backplane, amazingly.) - Josh
