2N4851
The 2N4851 (P/N 151-0504-00,151-0504-01) is a silicon unijunction transistor. It is often used as a simple relaxation oscillator (e.g. for the variable display time in TM500 frequency counters such as the DC501.
Used in
Some instruments using part 2N4851
| Instrument | Manufacturer | Class | Model | Description | Introduced |
|---|---|---|---|---|---|
| 212 | Tektronix | Oscilloscope | 212 | 500 kHz miniature dual channel analog scope | 1973 |
| 214 | Tektronix | Oscilloscope | 214 | Portable dual-trace storage scope | 1974 |
| 4631 | Tektronix | Printer | 4631 | Video Hard Copy Unit | 1976 |
| 4632 | Tektronix | Printer | 4632 | Video hardcopy unit | 1974 |
| 4701 | Tektronix | Multiplexer | 4701 | 8-channel multiplexer | 1971 |
| 7D01 | Tektronix | Plug-in | 7D01 | 16-ch Logic Analyzer | 1976 |
| 7D12 | Tektronix | Plug-in | 7D12 | digital meter plugin | 1974 |
| 7L12 | Tektronix | Plug-in | 7L12 | 1.8 GHz Spectrum Analyzer | 1971 |
| DC501 | Tektronix | Plug-in | DC501 | basic 100 MHz frequency counter | 1972 |
| DC502 | Tektronix | Plug-in | DC502 | 550 MHz frequency counter | 1972 |
| DC503 | Tektronix | Plug-in | DC503 | 100 MHz, 7-digit frequency counter | 1972 |
| DC503A | Tektronix | Plug-in | DC503A | 125 MHz, 8-digit frequency counter | 1981 |
| DC504 | Tektronix | Plug-in | DC504 | 80 MHz, 5-digit frequency counter | 1975 |
| DC505 | Tektronix | Plug-in | DC505 | 225 MHz counter/timer | 1974 |
| DC505A | Tektronix | Plug-in | DC505A | 225 MHz counter/timer | 1976 |
| DC508 | Tektronix | Plug-in | DC508 | 1 GHz counter | 1978 |
| DC508A | Tektronix | Plug-in | DC508A | 1.3 GHz counter | 1980 |
| LA501 | Tektronix | Plug-in | LA501 | logic analyzer | 1976 |