[GreenKeys] Wanted: Frederick 1290 parts & manuals

[David Ross]

  Does anyone have any Frederick 1290 parts for sale?  The 1290 is a 16 
channel teletype multiplex unit in a 19" rackmount package, it is about 
7" or 8" tall.

I am particularly looking for 'high level loop' interfaces for the 
1290.  The 1290 itself talks RS-232 and the high level loop unit 
provides a loop current interface for the 16 channels.

Also looking for manuals for the 1290.

73, thanks for any help
Dave Ross    N7EPI