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See: https://datassette.s3.us-west-004.backblazeb2.com/livros/z80_applications.pdf

Modern capacitor markings can be inscrutable; so little surface space for marking. Yes, that would be 10 uF maximum 15 Vdc -- perfectly reasonable for a 5 volt rail. Yes. Hopefully another 5V rail. There ought to somewhere be some capacitors with higher voltage ratings on the +-12V rails...

At what cost? Who was the original manufacturer; I thought that it was HEPA Corporation?

One issue is that "street rodders" don't use HEPA (0.3 micron) filters, do they? It's the "absolute filter" that's key. https://web.archive.org/web/20200424101345/http://hepa.com/ is no longer with us, but certainly the equivalent material(s) are used by many manufacturers. A basic description...

How did you accomplish that task?

Yes, it's a dipped tantalum decoupling/smoothing capacitor on the adjacent power-input rail. Lacking a schematic I'd (1) look at the markings on the nearby looks-the-same tantalum capacitor and determine what the voltage is on its associated power rail, and (2) determine the voltage on the...

I notice that their current listing (https://www.ebay.com/itm/226014959589) shows a "certification label" that I guess is pre-11 era. Interestingly it's not actually marked as to which certification applies. How should the marked, or unmarked, presence of this label be understood? What about...

I'm guessing that @NF6X objective of (re)using the blue-canister tapes on a non-LINC PDP "ain't gonna happen"?

Yes! Audio starts at ~30 seconds in.

No response, alas. So I'm asking here :-}!

Thank you Chuck. :)

Yes. See Figure A-8 and Page A-9 in: http://bitsavers.trailing-edge.com/pdf/dec/pdp8/pdp8e/DEC-8E-HMM1A-D-D_PDP-8e_Maintenance_Manual_Volume_1_Processor_Sep73.pdf Probably would have to create a substitute using SMD logic ICs on a DIP(ish)-sized PCB.

LMI: https://en.wikipedia.org/wiki/Lisp_Machines Symbolics: https://en.wikipedia.org/wiki/Symbolics https://metebalci.com/blog/cadr-lisp-machine-and-cadr-processor/

Not my area of expertise/understanding Chuck :-{. I can only suggest either (1) create a new "v2" project in Github, or (2) bundle up your updated source and post it here as a zip (and make reference to this thread in the Github intro). [Or (3) learn Github ...]

Chuck: How about updating your Github site. Please :-}? Or here ...

When you have a "spare moment" (ha!), please do :-}.

Presumably you haven't dropped them enough :->. (By "sag" I intended to refer to the effects of sudden deceleration, not eons of "creep".)

If you have control over box orientation during transfers I suggest packing the cartridges vertically (on edge), the normal storage orientation. Not horizontal (flat) that is more susceptible to forces that might cause platter "sag". However dropped is still dropped, and who knows what the box...

CNC controllers were almost always more complicated than what amounted to a "spooler" for a set of pre-packaged signals to the CNC device servos. More commonly the controller accepted a compact description of the tool path (see: RS-273, RS-274, and Gcode) and was used to interpolate between...

We had an immense (a couple of ft^3) SOLA unit (something like one of these: https://assets.alliedelec.com/v1609412648/Datasheets/8ad8acceed300f4ed5417a38c4cc09d8.pdf) bolted to the wall to supply a PDP-8/L and associated equipment in the early 70's. Although it did hum a bit, it was pretty...