[GreenKeys] Egads, more

[Lawrence Godek]

I have a HAL XTK-100 which is the Xtal osc board for the sT-6. NEw, 
never used.

A sheet of paper called TTY Connect by Vaux Electronics.  sSingle sheet, 
nice

A single sheet by Jack Hart , RS-232 to TTY loop interface.

Another pair of papers "Optocouplers for TTY Current loop"

All the above are nice clean drawings

Apparently there is more stuff somewhere.  I'll find it eventually.

Larry W0OGH