[GreenKeys] high speed LRPE2 reperf ??

[John W9DDD]

Also https://www.navy-radio.com/manuals/tty/255B-5901.pdf

John, W9DDD


> On Dec 1, 2021, at 5:20 AM, John W9DDD <w9ddd at tapr.org> wrote:
> 
> Perhaps it has 2 cycle cams? So it processes two characters per omemraotation of the shaft,  check the parts section.
> 
> See page 4 of https://www.navy-radio.com/manuals/tty/jh/ttyman7/TeletypeManuals/model28/573-119-800TC-Iss1.pdf
> 
> John, W9DDD
> 
> 
>> On Dec 1, 2021, at 4:43 AM, Duncan Brown <duncanancy at earthlink.net> wrote:
>> 
>> 
>> I am working on a Teletype Corp M28 RT (thanks Bill!). After cleaning it up and lubricating it, I put a signal to the LRPE2 (non-printing reperf) yesterday, but it is just punching garble. All the punch pins are punching and the punch patterns are repeatable, so I don't think anything is sticking.  Adjusting the Range control makes some difference in the punches, but still garble.
>> 
>> The fixed receive bracket gears in the LRXB base are what is called for in the manual (fig 3) for 100wpm ("A" gear =158700; "B" gear = 158716).
>> 
>> But when I give it 100wpm characters (from a M28 KSR or Heavy Metal), the reperf acts like it is running much faster. For example, if I send LTRS, it punches 01111, which implies that the reperf is looking for the first data bit while it is still receiving the start bit.
>> 
>> If I send Blank, it punches 00000 00001 (punches two characters), implying that the reperf is reading two bits for every one that I send.
>> 
>> I know that the cross-office lines in the auto switching centers operated very fast - up to 1000wpm.  Is this LRPE2 running at 200wpm?  I can't find anything defining a "LRPE2", other than "non-typing reperf"
>> 
>> Thanks,
>> 
>> Duncan
>> K2OEQ
>> 
>> 
>> 
>> 
>> 
>> 
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