CY 1807 R390a FSK Unit
 

I have forsale a CY 1807 Rack unit surplus from NASA many years ago

It is about 5 feet tall Rack and has the following
1-FSK unit
1-r390a (the second unit is gone) Normally 2
1-2 speaker unit for the r390a's
1-cooling fan unit

$1100 located 1 hour from Scranton or 45 minutes from Binghamton NY