[GreenKeys] CY870/UG

[Nick England]

I think it is mainly the LESU version that will give you the correct wiring.
Here is a summary extracted from
http://www.navy-radio.com/tty-index.htm

TT-47/UG
Model 28 Keyboard Send-Receive Page Printer Set. Consists of floor cabinet,
friction feed
typing unit, electrical service unit, keyboard, synchronous motor and gears
for 45.5 baud.
7.42 unit code, 60 Hz, 115VAC. Includes communication symbol arrangement and
selective calling feature.
TU- LP1/291 (MX-1115/UG)
ESU- LESU1 (SB-154/UG)
KBD- LK1/MT (MX-1114/UG)
MU- LMU1 (PD-111/U)
CAB- LAC200BJ (no CY- number assigned)

TT-47A/UG
Model 28 Keyboard Send-Receive Page Printer Set. Same as TT-47/UG except has
improved design with optional gears for 56.9 and 74.2 baud.
TU- LP3RN/AC100 (MX-1115A/UG)
ESU- LESU5/103 (SB-154A/UG)
KBD- LK3RN101 (MX-1114A/UG)
MU- LMU3 (PD-17A/U)
CAB- LAC200BJ104 (CY-870/UG)

TT-47B/UG
Model 28 Keyboard Send-Receive Page Printer Set. Same as TT-47/UG except has
improved design.
TU- LP4RN/AC142 (no MX- number assigned)
ESU- LESU5/103 (SB-154A/UG)
KBD- LK4RN126 (MX-1114B/UG)
MU- LMU3 (PD-17A/U)
CAB- LAC200BJ104 (CY-870/UG)

TT-47C/UG
Model 28 Keyboard Send-Receive Page Printer Set. Same as TT-47B/UG except
has
improved design.
TU- LP14RN/AY (MX-1115B/UG)
ESU- LESU7/147 (SB-964/UG)
KBD- LK4RN/126 (MX-1114B/UG)
MU- LMU3 (PD-17A/U)
CAB- LAC204BR237 (CY-2538/UG)

Have Fun,
Nick England K4NYW
www.navy-radio.com


On Mon, Nov 19, 2018 at 2:16 PM W9DDD <w9ddd at tapr.org> wrote:

>  From reading the NAVSHIPS for the TT-47, it looks like one of the 28s
> for which I have visiting privileges is in a CY-870/UG cabinet.  I can
> see that the 47 and 47A used the 870 cabinet.  The 47C has the more
> traditional cabinet.  There is no NAVSHIPS for the 47B, so I don't know
> about that version.  Why do I care?  I want to print the most
> appropriate schematic/wiring diagrams in preparation for my next visit
> to the "warehouse".
>
> May I assume that the change from 3-10 point terminals strips to 2-20
> point terminals strips took place with the change from the CY-870?  Or
> was there a mod-kit for the CY-870?
>
> I know, I should be taking pictures of name plates etc.  Turns out that
> of the three machines. it appears to be one from WU, one from Navy and
> the 3rd a Bell/AT&T version.  I was spoiled with my source in the 60s
> being all Bell System machines.
>
> --
> John, W9DDD
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