[GreenKeys] Model 28 stock ticker progress

Tue May 20 22:31:53 EDT 2025

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On 5/20/2025 9:13 PM, John, W9DDD wrote:
> It would appear that the top two rows of the type box print at the top 
> edge of the tape, and the bottom two print on the bottom edge. Bit 6 
> of the code is like top edge, bottom edge selection. Have you notice 
> there are two print hammers?  IIRC bit six is hammer selection.   This 
> is a very application specific machine.
>
>
> On 5/20/2025 8:12 PM, Peter Gottlieb wrote:
>> Both the top and bottom rows had both letters and figures, oddly enough.
>>
>> On 5/20/2025 8:58 PM, W2HX wrote:
>>> >But when I stepped through all
>>> characters the first half were on the bottom of the tape and the second
>>> half were on the top.  But not the same, they have different characters
>>> printing.  So there must be a shift code.
>>>
>>> As you probably know, the ticker tape print format had alpha 
>>> characters on the top row (stock symbol) and numbers and fractions 
>>> on the bottom row (stock price). Decimilization of stock prices 
>>> happened around 2000-2001 IIRC.
>>> MSFT
>>> 13 5/8
>>>
>>> But I have no further insight into the issues 🙂
>>>
>>>
>>> 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 Peter Gottlieb 
>>> <hpnpilot at gmail.com>
>>> *Sent:* Tuesday, May 20, 2025 8:05 PM
>>> *To:* Greenkeys <greenkeys at mailman.qth.net>
>>> *Subject:* [GreenKeys] Model 28 stock ticker progress
>>> Update:
>>>
>>> I have made some progress on several fronts with this machine.
>>>
>>> Many thanks to John W9DDD I now have type boxes.  They are set up for
>>> weather symbols which is interesting.  The character ordering is
>>> completely different than the standard.
>>>
>>> After running and oiling the machine seems to be working.
>>>
>>> I made repairs to the plastic front where it attaches to the frame and
>>> those areas were cracked and missing.
>>>
>>> I programmed an Arduino to send characters to the 28.  For now I just
>>> step through all 64 possible characters.  The speed of the unit is
>>> indeed 135 Baud and taking a video of the code bars shows them stepping
>>> through the binary possibilities.  So that is working and what I 
>>> want to
>>> send gets to the code bars.  That's a good first step.
>>>
>>> But the character encoding is very, very odd.  I'm not sure if I should
>>> rearrange the type box or not.
>>>
>>> And I am confused about the printing in two rows.  The 573-140-100
>>> manual I have doesn't cover that.  But when I stepped through all
>>> characters the first half were on the bottom of the tape and the second
>>> half were on the top.  But not the same, they have different characters
>>> printing.  So there must be a shift code.
>>>
>>> Once I understand this I can make a map and control what I print from a
>>> look up table but for now it's very confusing.
>>>
>>> I tried going to Staples for a typewriter ribbon but all I could 
>>> find is
>>> a little calculator ribbon but it was 1/2" and I could modify the 
>>> spools
>>> so it's at least printing until I can find a proper ribbon.
>>>
>>> I also need to locate some 1" paper tape.  For the moment I am cutting
>>> 1" strips from regular paper.
>>>
>>> Peter
>>>
>>>
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>>>
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>>> Message delivered to w2hx at w2hx.com
>>
>> ______________________________________________________________
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>>
>>>>> 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 w9ddd at tapr.org
>

-- 
---
----
The above comments or recommendations are SWAG. Use at your own risk.

John, W9DDD

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