Telequipment D56

Telequipment D56
10 MHz 2-ch scope Telequipment D56 Produced from (?) to (?) Manuals Manual needed D56 Description in 1968 Catalog (All manuals in PDF format unless noted otherwise)

The Telequipment D56 is a 10 MHz dual-channel dual beam oscilloscope produced in the late 1960s.

Specifications

Frequency Range between DC and 10 MHz (-3 dB).
Vertical Sensitivity between 10 mV/div to 50 V/div in 1-2-5 steps and including a 10x multiplier switch.
Rise Time in the area of 23 ns or more.
Input Impedance 1 Mohm // 40pF.
Sweep Rates between 500 ns/div to 5 s/div in 1-2-5 steps in calibrated mode with a 1-10 variable multiplier.
10 MHz time calibrator (intensity modulated marker) on ch 1 using Timebase A.
Mains 90 - 240 VAC, 50 Hz, ca 275 VA.
Dimensions 24 cm x 43 cm x 48 cm.
Weight about 50 lbs.
brief spec to be continued
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Manual is not available. The closest manual available is from the D55A with only tubes.
Mixed tubes and transistors.

The main differences between D56 and D55A are the following:

10 MHz compared to 15 MHz Bandwidth.
10 mV/div compared to 100 mV/div Sensitivity.
Circuit Boards are used more consistently apart from the Vertical Amplifiers.
Mixed Transistors and Tubes. Still many tubes, but adding transistors gives more possibilities.

35 tubes + CRT (same CRT as in the D55A).
Vertical Amplifiers (each): 2xEF184, 2xECC88, 2xE810F.
Horizontal Amplifiers (each): V101: ECF80, V102 ECF80, V103: ECC88, V104: ECC88, V105: EB91, V106: ECF80, V107: ECF80, V108: ECF80, V109: ECF80.
Time Delay: V302: ECC88, V303: ECC88.
Trace Blanking: V304: ECC88, V305: ECC88, V403: EF184.
Regulators Board ? PC23: V301: ECC88.
Regulators Board PC24: V401: EL86, V402: ECF80.
CRT: 5" flat-face, double gun, P1 phosphor. 1374K G.E.C.

Nine germanium PNP transistors.
Motorola T-119, TO-92, germanium, PNP: TR251, TR252, A; TR101, TR102, B; TR101, TR102. 6 pcs. total.
Newmarket 452, TO-3, germanium, PNP, 3A.
Newmarket ACY22, TO-5, Germanium, PNP. 225mW, 2 pcs.