[GreenKeys] Bunnell Pen Register

[Harold Hallikainen]

Not quite Teletype, but it IS printing telegraph! I've been working on one
of these pen registers.

Nameplate:
J. H. Bunnell & Co., Brooklyn New York
Pen Register
Model KS-3106
Serial Number 1 1068
Res 150

A manual on the device is available at
http://etler.com/docs/BSP/030/030-340-701_I2.pdf . This manual uses the
pen register as a Dialed Number recorder. I believe they were originally
Morse recorders and also fire alarm recorders.


The unit seems to have a mechanical alignment issue that I have not been
able to resolve. The shelf and feed wheel seem to be closer to the body of
the unit than the printing wheel. Guides near the tape reel are one
distance from the body, and guides near the feed wheel are closer. This
results in the tape slowly working its way off the feed wheel as shown on
the video at http://w6iwi.org/tmp/20200129_141035.mp4 .
Note that I reused tape, so there are more marks than there should be on
the tape.

Does anyone have a suggestion on how to keep the tape from falling off the
feed wheel?

Also, the tape moves pretty fast for Morse use (probably good for dial
pulses). Does anyone know where the tape speed adjustment is?

Thanks!

Harold


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