[GreenKeys] anyone know the details of this unit?

[Bob Rosenbloom]

If you don't need to be compatible with standard 8 bit tapes, you can 
always write out two characters per byte. Would be great for DEC 12-bit 
(PDP-8) machines also. It's still a really cool punch unit. Or follow 
Doug Jones attempt at making an 8 bit unit out of two 6 bit ones here 
(if you can find another 5 or 6 bit unit):

https://homepage.cs.uiowa.edu/~dwjones/pdp8/UI-8/bugs.shtml#69

The two characters/byte would be fine for just storing programs and showing off how paper tape was used.

Bob




On 3/29/2025 9:41 AM, W2HX wrote:
ok thank you. I wonder if this would be useful for playing around. I 
guess it could punch 5 level given the right data. But for vintage 
computer use, I would think i would need at least 7 bits....What do you 
think?


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

On 3/29/2025 9:26 AM, W2HX wrote:
> ok more internal pictures. Looks like 7 punches. Does this mean it is 
> a 6-bit (6 data holes, 1 index)?
>
>
>
> 73 Eugene W2HX
> My Youtube Channel: https://www.youtube.com/@w2hx/videos
>
> ------------------------------------------------------------------------
> *From:* W2HX <w2hx at w2hx.com>
> *Sent:* Friday, March 28, 2025 2:16 PM
> *To:* Bob Rosenbloom <bobalan at sbcglobal.net>; 
> greenkeys at mailman.qth.net <greenkeys at mailman.qth.net>
> *Subject:* Re: [GreenKeys] anyone know the details of this unit?
> excellent find on that. So I think I'll ask the seller to open the 
> front and try to send a picture, well lit, similar to this picture. 
> And hopefully we can see what this is...
>
> https://www.navy-radio.com/tty/brpe/IMG_7390-ed.jpg
>
> It seems to me that is the best angle to see the punch block.
>
>
> 73 Eugene W2HX
> My Youtube Channel: https://www.youtube.com/@w2hx/videos
>
> ------------------------------------------------------------------------
> *From:* greenkeys-bounces at mailman.qth.net 
> <greenkeys-bounces at mailman.qth.net> on behalf of Bob Rosenbloom 
> <bobalan at sbcglobal.net>
> *Sent:* Friday, March 28, 2025 1:17 PM
> *To:* greenkeys at mailman.qth.net <greenkeys at mailman.qth.net>
> *Subject:* Re: [GreenKeys] anyone know the details of this unit?
> DEC used the BRPE punch on it's Typeset-8 system. They had that knob 
> on the top. See:
>
> http://www.bitsavers.org/www.computer.museum.uq.edu.au/pdf/DEC-08-17TA-D%20Typeset-8%20Systems%20-%20Negative%20Logic%20Maintenance%20Manual.pdf 
> <http://www.bitsavers.org/www.computer.museum.uq.edu.au/pdf/DEC-08-17TA-D%20Typeset-8%20Systems%20-%20Negative%20Logic%20Maintenance%20Manual.pdf>
>
> Bob
>
> On 3/28/2025 8:44 AM, W2HX wrote:
>> one more picture.  Interesting knob at the top with the label
>> AVAILABLE
>> STOP WHEN DONE
>> CONTINUOUS
>> OFF
>>
>> 73 Eugene W2HX
>> My Youtube Channel: https://www.youtube.com/@w2hx/videos 
>> <https://www.youtube.com/@w2hx/videos>
>>
>> ------------------------------------------------------------------------
>> *From:* W2HX <w2hx at w2hx.com> <mailto:w2hx at w2hx.com>
>> *Sent:* Friday, March 28, 2025 11:37 AM
>> *To:* Greenkeys <greenkeys at mailman.qth.net> 
>> <mailto:greenkeys at mailman.qth.net>
>> *Subject:* anyone know the details of this unit?
>> See pix.  It says "BRPE8 6" from what I can tell.  Also, by the 
>> connector it appears to be a parallel unit?
>> 8 level I would assume, but might it be 6 level with the "6" in the 
>> model number?
>> Is it easy for a non-technical seller to remove the cover from the 
>> punch block to know more? Does it lift off easily? does it require 
>> screw removal?
>> thx
>>
>>
>> 73 Eugene W2HX
>> My Youtube Channel: https://www.youtube.com/@w2hx/videos 
>> <https://www.youtube.com/@w2hx/videos>
>>
>>
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