Telequipment S51

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Telequipment S51
3 MHz tube scope
Telequipment S51B

Produced from (?) to (?)

Manuals
Manuals – Specifications – Links – Pictures

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

Pictures

S51B

S51E

Components

Some Parts Used in the Telequipment S51

Part Part Number(s) Class Description Used in
6BL8 154-0278-00 Vacuum Tube (Triode/Pentode) triode-pentode combo 67 2B67 3B1 3B1S 3B2 3B3 3B4 503 504 506 516 549 561 561A 561S 564 565 567 Telequipment D52 Telequipment D56 Telequipment S31 Telequipment S32 Telequipment S32A Telequipment S51 Telequipment S52
6DJ8 154-0187-00 154-0305-00 Vacuum Tube (Dual Triode) dual triode 132 161 310A 316 317 502 502A 503 504 506 515 516 519 526 529 RM529 533 535 536 543 544 545 545A 545B 546 547 549 555 556 561A 561S 564 565 567 581 581A 585 585A 661 1A4 1S1 60 2A60 63 2A63 67 2B67 3A1 3A1S 3A2 3A3 3A6 3A7 72 3A72 75 3A75 4S2 51 3B1 3B1S 3B2 3B3 3B4 3M1 3S76 3T77 3T77A 9A1 9A2 1121 80 81 82 86 B O W Z Telequipment D56 Telequipment S32A Telequipment D52 S-311 Telequipment TD51 Telequipment S52 Telequipment S51 Telequipment Type A TU-4