Early
Digital Test
Equipment 		Northeastern 40-80
Counter 		 

Manufacturer:Northeastern
Model:40-80
Year:1964
Schematic:RE
  
Max Rate:30 MHz (measured)
Display:NIXIE
Digits:8
Logic:discrete transistor Ge-PNP

Rugged well-built unit, sealed circuit boards. The unit in the photo includes a 200 MHz pre-scaler plug-in (right side).


Clockwise from top left: an input amplifier, dual decoder/NIXIE driver, a low speed decade counter with latch, and a high speed decade counter with latch for the first digit.


  .. | Northeastern 40-80 | ..
Early Digital Test Equipment 		bhilpert