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?
From: Jones, Douglas W <douglas-w-jones@uiowa.edu>
Sent: Friday, March 28, 2025 12:04 PM
To: Eric Moore <mooreericnyc@gmail.com>; W2HX <w2hx@w2hx.com>
Cc: Greenkeys <greenkeys@mailman.qth.net>
Subject: Re: [External] Re: [GreenKeys] anyone know the details of this unit?______________________________________________________________From: Eric Moore <mooreericnyc@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
GreenKeys mailing list
Home: http://mailman.qth.net/mailman/listinfo/greenkeys
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:GreenKeys@mailman.qth.net
>>> Jordan Spencer Cunningham's GreenKeys Search Tool: https://teletype.net/gksearch
>>> 2002-to-present greenkeys archive: http://mailman.qth.net/pipermail/greenkeys/
>>> 1998-to-2001 greenkeys archive: http://mailman.qth.net/archive/greenkeys/greenkeys.html
>>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool: http://comcents.com/tty/greenkeyssearch.html
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to navy.radio@gmail.com