155-0064-00
The Tektronix H074A (P/N 155-0064-00) is a vertical output amplifier hybrid integrated circuit in a 12-pin TO-8 stud mounted can, developed by Tektronix in the early 1970s.
Maximum power dissipation is 4 watts. Rise time is specified as 470 ps (equiv. bandwidth 745 MHz).
The hybrid consists of three dice on a BeO substrate − an M080 differential amplifier ("ft doubler"), and two D078 NPN output transistors in common-base configuration.
It is the same as the 155-0065-00 (H074), except for the case stud and specified pin 3 to case breakdown voltage.
There is also an H074B (155-0125-00) version.
According to Modification 050-1014-00, Vertical Output Microcircuit Replacement, the emitter resistors need to be selected according to a code printed on the device.
- 155-0064-00 Specs (1973)
- 155-0064-00 Specs (1973)
- 155-0064-00 Specs (1979)
Used in
- 7834, 7854 (A18U150)
- 7904, R7903 (U745, vertical output in SN B260000 and up; B259999 and below use 155-0065-00)
- 7912AD (A34U745)
- 485
- PG502 (U400) (earlier SN, later 155-0125-00)
Some instruments using part 155-0064-00
| Instrument | Manufacturer | Class | Model | Description | Introduced |
|---|---|---|---|---|---|
| 485 | Tektronix | Oscilloscope | 485 | 350 MHz portable scope | 1972 |
| 7834 | Tektronix | Oscilloscope | 7834 | 400 MHz storage mainframe | 1977 |
| 7854 | Tektronix | Oscilloscope | 7854 | 400 MHz waveform-processing scope | 1980 |
| 7904 | Tektronix | Oscilloscope | 7904 | 500 MHz non-storage mainframe | 1971 |
| 7912AD | Tektronix | Oscilloscope | 7912AD | 500 MHz digitizer | 1978 |
| PG502 | Tektronix | Plug-in | PG502 | 250 MHz pulse generator | 1974 |
| R7903 | Tektronix | Oscilloscope | R7903 | 500 MHz non-storage mainframe | 1974 |
Pictures
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Schematic and pinout
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Mechanical
