[GreenKeys] LPR35 BRP

[W2HX]

Thanks everyone for lots of good clues. I am not reading through this manual “reperf-94456-6302.pdf” from Nick’s site and it has lots of pertinent information.


73 Eugene W2HX
Subscribe to my Youtube Channel: https://www.youtube.com/@w2hx/videos

From: Nick England <navy.radio at gmail.com>
Sent: Wednesday, January 25, 2023 9:07 PM
To: W2HX <w2hx at w2hx.com>
Cc: Greenkeys <greenkeys at mailman.qth.net>
Subject: Re: [GreenKeys] LPR35 BRP

A handy place to look is
https://www.navy-radio.com/tty/navelex-tty-1977.pdf

This shows the LPR35 used in TT-274 ROTR
which says "manual tape backspace and remote control non-interfering LETTERS tape feed out."

Nick England K4NYW
www.navy-radio.com<http://www.navy-radio.com>


On Wed, Jan 25, 2023 at 5:57 PM W2HX <w2hx at w2hx.com<mailto:w2hx at w2hx.com>> wrote:
Hi all,

In my question to produce fully punched tape, I acquired this LPR35 BRP unit. I hope to replace the hanging chad unit in my ROTR. I have NOT yet installed this on the ROTR base, I’m just getting familiar with it first.

https://w2hx.com/x/TTY/28-ROTR/LPR%2035%20BRP%20Full%20Chad%20Reperf/20230125_163630.jpg
https://w2hx.com/x/TTY/28-ROTR/LPR%2035%20BRP%20Full%20Chad%20Reperf/20230111_175044.jpg

It appears to have some modifications for tape feed out. Perhaps some automatic tape feed out control as might be evidenced by this solenoid. Remote? Interfering? Non-interfering?  Blank tape feed out?
https://w2hx.com/x/TTY/28-ROTR/LPR%2035%20BRP%20Full%20Chad%20Reperf/20230125_163635.jpg
However,  manually actuating the solenoid does pitifully little, I can’t imagine how this could do anything. Maybe once things get in motion through the motor, this will do more?
My current ROTR’s LPR has a lever which I believe is manual LTRS feed out function.

There is this hexagonal attachment on this shaft which seems to be possibly related
https://w2hx.com/x/TTY/28-ROTR/LPR%2035%20BRP%20Full%20Chad%20Reperf/20230125_163641.jpg
https://w2hx.com/x/TTY/28-ROTR/LPR%2035%20BRP%20Full%20Chad%20Reperf/20230122_192307.jpg
https://w2hx.com/x/TTY/28-ROTR/LPR%2035%20BRP%20Full%20Chad%20Reperf/20230122_191140.jpg

Now for the problem. As I picked up this unit with almost no force on it, this piece broke off.
https://w2hx.com/x/TTY/28-ROTR/LPR%2035%20BRP%20Full%20Chad%20Reperf/20230125_163652.jpg

There were two screws that attached it to the hexagonal shaft.
https://w2hx.com/x/TTY/28-ROTR/LPR%2035%20BRP%20Full%20Chad%20Reperf/20230122_191148.jpg

these two screws look like they sheared off, but I suspect they were previously broken and just sitting in the holes with some grease. I can’t see how what I did could shear two screws, but alas, here we are.
https://w2hx.com/x/TTY/28-ROTR/LPR%2035%20BRP%20Full%20Chad%20Reperf/20230122_191218.jpg

here is the rear of the shaft.
https://w2hx.com/x/TTY/28-ROTR/LPR%2035%20BRP%20Full%20Chad%20Reperf/20230122_192249.jpg

I plan to order replacement parts from Mr. RTTY but I wanted to understand what I’ve lost and what I’ll gain from replacement parts.

Anyone familiar with this set up on the LPR35? What do I have? Once I replace the shaft, how do I actuate that solenoid? AC line voltage? Dc voltage?

Any pointers greatly appreciated.


73 Eugene W2HX
Subscribe to my Youtube Channel: https://www.youtube.com/@w2hx/videos

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