TELETYPE MODEL 28 (CONTINUED)

TELETYPE MODEL 28 (CONTINUED)

*Model 28 Typing Reperforator*
	Standard Model: 28-TR?? Military Model: TT-192A/UG Relatives: Same mechanism used in the M28-ASR Manufactured: 1951-1960? Units Produced: ?? Units Remaining: ?? (estimated) Dimensions (inches): ?? Weight (pounds): ?? Keyboard: (none) Code: 5-level baudot (ustty or ita2) at 60 wpm (45.5 baud) Interface: 60-mA current loop (@120VDC typical) Full- or Half-Duplex; 60/20-mA selectable Motors: 110-VAC Synchronous, or ?? Options: gears??
The Teletype Corp Model 28 Typing Reperforator... (need more poop here)....

The inside of an M28 typing reperf.

This M28 reperf is military model TT-192A/UG.

The tape is mounted on top in the TT-192A/UG, not to the side like the unit above.

You can see the small typewheel to the left. It prints on the top of the chadless paper tape, and punches it from below.

(comment needed)

It's a pretty compact little mechanism!


*Model 28 Transmitter-Distributor*
	Standard Model: 28-TD?? Military Model: TT-603/UG, TT-187B/UG Relatives: Same mechanism used in the M28-ASR Manufactured: 1951-1960? Units Produced: ?? Units Remaining: ?? (estimated) Dimensions (inches): ?? Weight (pounds): ?? Keyboard: (none) Code: 5-level baudot (ustty or ita2) at 60 wpm (45.5 baud) Interface: 60-mA current loop (@120VDC typical) Full- or Half-Duplex; 60/20-mA selectable Motors: 110-VAC Synchronous, or ?? Options: gears??
The Teletype Corp Model 28 Transmitter-Distributor... (need more poop here)....

This is my TT-603/UG unit. More pics here.

At the heart of an M28-TD is a mechanism like this LXD37.

This M28-TD is military model TT-187B/UG. It looks identical to the TT-603/UG -- I don't know the differences.


*TT-253 (M28-KTR) Keyboard Typing Reperforator*
	Standard Model: None? Military Model: TT-253 Relatives: Same mechanisms used in the M28-ASR Manufactured: 19??-?? Units Produced: ?? Units Remaining: 3 (estimated) Dimensions (inches): ?? Weight (pounds): ?? Keyboard: (none) Code: 5-level baudot (ustty or ita2) at 60 wpm (45.5 baud) Interface: 60-mA current loop (@120VDC typical) Full- or Half-Duplex; 60/20-mA selectable Motors: 110-VAC Synchronous, or ?? Options: gears??
The Teletype Corp TT-253 (Model 28) Keyboard Typing Reperforator... "It works as a keyboard send-receive unit on the air or punches tape off the air. I've had it hooked in the loop and used the keyboard to send over the air. Since it's brand new, the keyboard action is silk smooth. It's a full chad unit (no lids left attached) and prints along the center where the drive sprocket holes are. The chads get blown out through a chute into a collector bag on the rear. It had 100 wpm gears when I got it, but I put 60 wpm gears in it." [Bill Strangfeld]

Bill Strangfeld's military model TT-253 is a Model 28 Keyboard Typing Reperforator He has three of them -- this one is new in the packing crate!

This is the metal case to Bill's TT-253.