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.
- Unit Log -
Serial Number:  | 26252 |
Year of Manufacture:  | 1964 (Component date stamps) |
Other Identification:  | Canadian Armed Services
Navy CD176519
6625-21-799-5779
Frequency Meter
Serial No. 26252 |
Date of Receipt:  | 1995 Nov |
State upon Receipt:  | Good physical condition.
Dusty.
Functional. |
Date:  | 1995 Nov |
Procedure:  | Line cord replaced. |
Date:  | 1995 Nov |
Procedure:  | Two NIXIEs do not light light up.
Bad ones moved to digits 10^6 and 10^7. |
Date:  | 2005 Jul 26 |
Procedure:  | Bad NIXIES replaced with B-5092 (8421) (originals are B-5031).
Replacements placed in digits 10^5 and 10^6,
both have a problem illuminating on upper right of numeral '8'.
One original NIXIE which has only partial illumination on some numerals placed in digit 10^7. |
Date:  | 2005 Jul 26 |
Procedure:  | Some dusting done, could do with more. |