Telequipment S51
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The Telequipment S51 is a low-cost single-channel 3 MHz scope originally intended for the service and education markets.
There was an S51E model variant for education that eliminated the external trigger input in favour of a sweep (sawtooth) output, and an S51T variant with an additional (selectable) horizontal preamplifier (100 mV/cm at 10 kHz bandwidth).
It contains 7 tubes except the CRT (one ECF80, six ECC88) and one transistor.
The S51 is convection cooled.
Key Specifications
| Bandwidth | DC to 3 MHz (−3 dB), AC cutoff |
|---|---|
| Deflection | 100 mV/cm to 50 V/cm, 1−2−5 |
| Input impedance | 1 MΩ // 30 pF (banana connector) |
| Sweep | 100 ms/cm to 1 μs/cm, 1−10 and 10:1 variable (slowest 1 s/cm) |
| CRT | 5" Brimar Se5F, P1 phosphor initially / P31 on later models; 3 kV acceleration |
| X input | 1-2 V/cm, 5 Hz − 200 kHz; 500 kΩ // 100 pF; (S51T: Optional 100 mV/cm, 10 kHz mode) |
| Features | Auto trigger, TV trigger, Z input |
Links
- Fixing a Telequipment S51B @ YouTube
- Telequipment S51B @ radiomuseum.org
Pictures
S51B
S51E
Some Parts Used in the Telequipment S51
| Page | Class | Description | Used in |
|---|---|---|---|
| 6BL8 | Vacuum Tube (Triode/Pentode) | triode-pentode combo | 549 • Telequipment D52 • Telequipment S32 • Telequipment S32A • Telequipment S51 • Telequipment S52 |
| 6DJ8 | Vacuum Tube (Double Triode) | dual triode | 132 • 502 • 502A • 503 • 504 • 515 • 516 • 519 • 529 • RM529 • 533 • 535 • 543 • 544 • 545 • 545A • 545B • 546 • 547 • 549 • 555 • 556 • 565 • 581 • 581A • 585 • 585A • 661 • 2A60 • 2A63 • 3A8 • 1121 • 1A4 • 67 • 81 • 82 • 86 • 3B1 • 3B4 • 1S1 • B • O • W • Z • Telequipment S32A • Telequipment D52 • Telequipment S52 • Telequipment S51 • Telequipment Type A |