465
- Note: The Tektronix 465M scope has its own page.
The Tektronix 465 is a portable 100 MHz dual-trace oscilloscope with dual time-bases, introduced in November 1972. It is all solid-state except for the CRT. The 465 was very popular and Tek made them for quite a few years. According to microfiche records, 37 variations of the 465 were produced.
There was no 465A but a 465B (int. 1980) with the same base specs but improved performance. The 475 is a 200 MHz sister model. See also 465M.
The optional DM44 multimeter attaches to the top of the instrument.
Bill Turner worked as a calibration technician for the 465 oscilloscope group.
Key Specifications
| Bandwidth | DC to 100 MHz on CH1 & CH2 for −15°C to +40°C and DC to 85 MHz from +40°C to +55°C |
|---|---|
| Risetime | 3.5 ns for 0°C to +40°C and 4.2 ns from +40°C to +55°C |
| Input impedance | 1 MΩ ±2% // 20 pF |
| Input voltage | max. 500 V DC (250 VDC when DC coupled) + Peak AC or 500 Vp-p AC at < 1 kHz |
| Trigger coupling | DC, AC, LF Reject, HF Reject |
| Channel isolation | 100:1 at 25 MHz |
| Z-Axis input | DC to 50 MHz; 5 Vp-p signal causes noticeable modulation at normal intensity |
| Output signals | CH1 Vertical, A & B +Gate |
| Calibrator | ~1 kHz, 300 mV, square wave |
| CRT | T4650 (154-0676-00/154-0676-05/154-0676-10) tube, P31 phosphor, 18.5 kV acceleration, 8 cm × 10 cm graticule |
| Power | 110/115/120/220/230/240 VAC ±10%, selected via primary voltage selector and regulating range selector assembly, 48 Hz to 440 Hz; 75 W |
Internals
The 465 uses tunnel diodes with Tek part number 152-0125-00, which are equivalent to TD3A, and 155-0032-00 chips (their -01 grade) as trigger amplifiers.
Links
- Rajesh's Tek 465 Repair
- The New Look in Portables, in Tekscope Vol. 4 No. 5, 1972
- Jim Williams repairs Tom Osborne's Tektronix 465B oscilloscope (YouTube)
- Another successful 465 repair, shorted tantalum (YouTube)
- Tek 465 page @ amplifier.cd
- 465B differences
- Tek 465 "teardown"
- Replacing Electrolytic Filter Capacitors in a Tektronix 465
- Zenwizard Studios - Power Supply and Tube Calibration
- Zenwizard Studios - Vertical Amplifier Calibration (Full)
- Zenwizard Studios - Trigger and Timebase Calibration (Full)
- Zenwizard Studios - Extensive Board Removal (All but Main board)
- 465 Mod UC by vintageTek Museum @ YouTube
Common Problems
- See 465/Repairs
Pictures
465
465 Mod UC
465B
CRTs used in the 465
| Page | Part nos | Description | Designers | Used in |
|---|---|---|---|---|
| 154-0731-00 | 154-0731-00 • 154-0731-01 • 154-0731-02 • 154-0731-04 | CRT | Telequipment D75 • 455 • 465 • 465B • 468 | |
| T4650 | 154-0676-00 • 154-0676-05 • 154-0676-10 • 154-0676-14 | CRT | Connie Wilson • Gary Nelson | 465 • Telequipment D75 • Telequipment D755 |
CRTs used in the 465B
| Page | Part nos | Description | Designers | Used in |
|---|---|---|---|---|
| 154-0731-00 | 154-0731-00 • 154-0731-01 • 154-0731-02 • 154-0731-04 | CRT | Telequipment D75 • 455 • 465 • 465B • 468 |
Custom ICs used in the 465
Custom ICs used in the 465B
| Page | Model | Part nos | Description | Designers | Used in |
|---|---|---|---|---|---|
| 155-0032-00 | M55 | 155-0032-00 • 155-0032-01 | variable-gain transconductance amplifier (voltage in, current out) | Roy Hayes • Einar Traa | 335 • 464 • 465 • 465B • 466 • 475 • 475A • 475M • 634 • 650 • 651 • 652 • 653 • 655 • 656 • 670 • 671 • 7A12 • 475 • FG504 • 1440 • 1460 • 1480 • 1481 • 1482 • 1485 |
| 155-0115-00 | 155-0115-00 | 155-0115-00 | vertical amplifier | 335 • 464 • 465 • 465B • 466 • 468 |