[GreenKeys] my 28ASR

[Don Robert House]

Charles wrote:

>after many idle years i am starting to revive my 28ASR.
>http://home.dal.net/charlesr/28asrint.jpg shows the inside of its case
>with the mechanism removed, and several items draw my attention:
>
>I believe it to be a very late production 28ASR and the sound insulation
>material (is that its purpose?) was foam rubber except for one piece of
>fabric just behind the LXD TD head. The foam rubber was badly decayed
>and i removed it, so you will mostly see metal with small bits of foam
>where it was glued to the metal.
>
>Notice the ESU with a black Sigma polar relay. The relay has eleven
>banana plug type pins. Is this ESU a typical one, and what can amyone
>tell me about it?
>It is marked WU TEL. CO WIRING CABINET 9797B MADE BY VECTOR ASSOC. There
>are no other WU markings anywhere on the machine and i suspect the ESU
>is older than the rest of the machine. The ESU has capacitors with what
>i think are date codes in 65 and 66. Disregard the red phone plug which
>is my addition.
>
>This is a single-speed 28ASR geared for 100WPM.
>
>I would appreciate any comments.
>
>73 de W3NU


Charles,

I have never seen an LESU like the one in your photo.  Something WUT 
came up with I guess.
I can send you a 60 wpm gear set if you need it.  I might even have a 
spare Bell type ESU.  Let me know.

Best regards,
Don


-- 
--------------------------------------------------------
Don Robert House, N.S.E.
Curator, NADCOMM
North American Data Communications Museum
3841 Reche Road
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