| Manufacturer: | Hunter |
| Model: | 120A KLOCKOUNTER |
| Year: | 1967 |
| Schematic: | RE |
| |
| Max. Rate: | 5 KHz |
| Display: | dekatron |
| Digits: | 4 |
| Logic: | tube |
|
A small timer and event counter.
The timebase is a small synchronous motor spinning a disc with holes in it,
and an optical sensor.
Does not measure frequency directly as there is no gate control.
The 6802 dekatron tubes are specified to a maximum rate of 5KHz,
by simple visual observation the counter appears to function up to around 6 KHz.
The photo exposure shows the unit actively counting.
The LSD (digit at bottom) has passed through zero,
the consequent carry resulting in the increment of the digit above.
- Unit Log -
| Serial Number: | (none) |
| Year of Manufacture: | 1967 (Capacitors stamped with 6708, 6716). |
| Other Identification: | Series D |
| Date of Receipt: | 1997 Aug |
| State upon Receipt: | Clean, functional.
Unit had been modified slightly with a relay and some simple controlling circuitry installed. |
| Date: | 1997 Aug 18 |
| Procedure: | Modifications removed. |
| Date: | 1997 Aug 18 |
| Procedure: | Line cord replaced. |
