067-0502-01
The Tektronix 067-0502-01 Amplitude Calibrator and Comparator is an instrument that can be used to produce a reference rectangle voltage or current waveform and/or to compare an external unknown input with an internal or external reference.
The output voltage is only accurate if terminated in 1 MΩ, the 50 V setting will experience the highest error if not properly terminated (0.5% in an open load).
The comparison is performed using an Airpax A175 chopper to switch between the two voltages that are being compared. The resulting output is a rectangular waveform with amplitude equal to the difference of two voltages. This waveform can be amplified using a drift-free AC amplifier and viewed on an oscilloscope for high sensitivity comparison.
See the 067-0502-00 page for a comparison of the -00 and -01 models.
The output amplitude can be reduced down to 0.2 μV using the 067-0529-00 1000:1 precision divider.
Key Specifications
| Output | DC+, DC-, Squarewave |
|---|---|
| Amplitude range | 0.2 mV to 100 V in 1−2−5 sequence, 5 mA in current loop |
| Amplitude accuracy | Within 0.25% into 1 MΩ load |
| Squarewave repetition rate | 1 kHz within 20% |
| Maximum input voltage | 100 V |
Links
- Tektronix 067-0502-01 Repair and Calibration
- 067-0502-01 @ radiomuseum.org
Documents Referencing 067-0502-01
- (no results)
Internals
The HV supply uses a tube V427, to regulate the +300V supply. The manual lists V427 as a 7734, a triode-pentode, however some models contain a small circular adapter board (670-1860-00, 388-2423-00) to adapt the noval tube socket to a Compactron socket and use a 6G11 double pentode instead. The adapter PCB connects the screen grid and plate of the beam power tube together in a triode configuration. These models also have 6G11 printed below V427 on the chassis.
Pictures
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067-0502-01
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067-0502-01 Schematic
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067-0502
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067-0502-01 rear
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067-0502-01 bottom
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067-0502-01 front
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067-0502-01 internal view
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067-0502-01 internal detail with 6G11 as V427
Some Parts Used in the 067-0502-01
| Part | Part Number(s) | Class | Description | Used in |
|---|---|---|---|---|
| 6G11 | 154-0660-00 | Vacuum Tube (Pentode) | double sharp cut-off beam power pentode | 125 • 132 • 519 • 067-0502-01 • 050-0551-00 |
| RCA 40250 | 151-0148-00 | Discrete component | Si-NPN bipolar transistor | RE4012 • RM529 • R293 • R522A • 015-0057-00 • 015-0057-01 • 015-0073-00 • 067-0502-00 • 067-0502-01 • 067-0601-00 • 1A4 • 1S1 • 1S2 • 1101 • 114 • R116 • 140 • 142 • 144 • 145 • 145M • 146 • 147 • 149 • 184 • 284 • 285 • 286 • 3S1 • 3S2 • 3S5 • 3S6 • 3T5 • 3T6 • 4002A • 4501 • 4701 • 491 • 5030 • R5030 • 5031 • R5031 • 520A • R520A • 521 • 521A • R521A • 522 • 522A • 576 • 601 • 602 • 611 • 647A • R647A • 650 • 650A • 650HR • 651 • 651A • 651HR • 653A • 653HR • 656 • 7L12 • 7503 • 7504 • 7514 • 7704 • R7704 • T4002 • T4005 |