[GreenKeys] Model 32s, 33s, 35s, 38s, etc. etc.

Fri, 03 Jan 2003 07:41:49 -0500

Keep in mind the actual selector magnet in the 32/33 is 500 MA, not 20 or 60
ma.
The SMD converts the bipolar 20 ma or unipolar 20 or 60 ma loop to the 500
ma.

Here are the gear numbers: (all assume 60 Hz operation)

Motor      Follower
181411     181417     60 wpm
181411     181419     66 wpm
186462     186460     68.2 wpm
181411     184158     75 wpm
186539     186538     75 wpm
181411     181420     100 wpm

-----Original Message-----
From: Don Robert House [mailto:[email protected]]
Sent: Thursday, January 02, 2003 11:46 PM
To: [email protected]
Subject: [GreenKeys] Model 32s, 33s, 35s, 38s, etc. etc.

You will recall I mentioned that the 32 was most likely a TELEX 
machine which uses line current in both directions for connection 
functions.  If the machine was NOT a TELEX it may have used a 20 ma 
local selector circuit served by a Selector Magnet Driver (SMD) Card. 
Most 33s, 35s, 38s, and 37s were designed this way.  Datasets (early 
modems) were used to convert FSK tones to operate the SMD card and 
thus the selector.

Don
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