[GreenKeys] [External] Re: anyone know the details of this unit?

[W2HX]

Doug, what does the nomenclature plate on your 6-bit units say? Does it say "BRPE8 6"? do we know what an 8-level BPRE name plate says?





73 Eugene W2HX
My Youtube Channel: https://www.youtube.com/@w2hx/videos





________________________________
From: Jones, Douglas W <douglas-w-jones at uiowa.edu>
Sent: Friday, March 28, 2025 12:04 PM
To: Eric Moore <mooreericnyc at gmail.com>; W2HX <w2hx at w2hx.com>
Cc: Greenkeys <greenkeys at mailman.qth.net>
Subject: Re: [External] Re: [GreenKeys] anyone know the details of this unit?

From: Eric Moore <mooreericnyc at gmail.com> -- Friday, March 28, 2025 10:53 AM

> 3) maybe, take a pic of the bottom and see how many resistors are installed?

I have 2 6-bit advanced-feed-hole BRPE's I am merging to make an 8-bit BRPE.  Both were manufactured with all 8 resistors (and diodes) in the base and with wiring for 8-bit data.  The extra wires are taped and bundled.  So, aside from getting or making an 8-bit punch block, all I have to do is move solenoids, linkages and whatnot from one to the other.

The knob on top of the case of the mystery BRPE is something I wouldn't have imagined.  The top of the case just lifts off, and having a knob and wiring linking it to the guts is unexpected.

Yes, the BRPE is a high-speed parallel punch.  It can be geared (or timing belted) to punch at rates from 60 to over 100 characters per second.  Really interesting linkages are required to run a punch that fast.

I've been writing notes on my BRPE project here:
-- https://homepage.cs.uiowa.edu/~dwjones/pdp8/UI-8/bugs.shtml#69

               Doug Jones
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