Telequipment D56: Difference between revisions

Revision as of 05:58, 13 February 2024

Telequipment D56
15 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)

Manuals – Specifications – Links – Pictures

The Telequipment D56 is a 15 MHz dual-channel dual beam oscilloscope produced in the late 1960s.

It uses a mix of tube and solid-state circuitry. In the absence of a D56 manual, the closest manual is that of the D55A, which is an all-tube scope from 1963.

Key Specifications

Bandwidth	DC to 15 MHz (-3 dB)
Rise time	23 ns
Deflection	10 mV/div to 50 V/div, 1–2–5, and ×10 magnifier
Input Impedance	1 MΩ // 40 pF
Sweep Rate	500 ns/div to 5 s/div, 1–2–5, and ×10 magnifier
Features	10 MHz time calibrator (intensity modulated marker) on CH11 using Timebase A
Power	90 - 240 VAC, 50 Hz, ~275 VA
Dimensions	24 cm × 43 cm × 48 cm
Weight	26.7 kg (59 lb)

Internals

Differences between D56 and D55A

The main differences between D56 and D55A are the following:

Both have 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.

Tubes

35 tubes + CRT (same CRT as in the D55A).
Vertical Amplifiers (each): 2×EF184, 2×ECC88, 2×E810F.
Horizontal Amplifiers (each): V101: ECF80, V102 ECF80, V103: ECC88, V104: ECC88, V105: EAA91, 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.

Transistors

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.

Pictures

D56 Front View
D56 trace
D56 Rear View
D56 Vertical Amplifiers Side View
D56 Vertical Amplifiers Side View
Rear View with Transformers and Regulators
D56 Regulators
Timebase Side View
Timebase A top
Trace Blanking Board PC27
Timing Delay Transistors
Trigger? Board Transistors
Neutralization Trimmer, do not change
Vertical Amplifier Component Side
Rear Board on Vertical Side

Components

Some Parts Used in the Telequipment D56

Part	Part Number(s)	Class	Description	Used in
6AL5	154-016 • 154-0016-00 • 154-0038-00	Vacuum Tube (Dual Diode)	high-perveance dual diode	163 • 181 • 190 • 1M1 • 310 • 310A • 315 • 316 • 317 • 3B1 • 3B1S • 3B2 • 3B3 • 3B5 • 502 • 502A • 503 • 511 • 511A • 512 • 516 • 517 • 517A • 524 • 526 • 535 • 535A • 545 • 545A • 549 • 551 • 565 • 570 • 581 • 581A • 585 • 585A • C • T • Telequipment D56 • Telequipment S52
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
6CW5	154-0202-00	Vacuum Tube (Pentode)	power pentode	132 • 526 • 547 • General Radio 1124 • Telequipment D56
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
6EJ7		Vacuum Tube (Pentode)	high-gain frame grid RF pentode	526 • Telequipment D56 • Telequipment S32A • Telequipment TD51
7788	154-0420-00	Vacuum Tube (Pentode)	long life, shock and vibration resistant pentode	529 • RM529 • 581A • 585A • RM581 • RM585 • Telequipment D56

@@ Line 13: / Line 13: @@
 * [[Media:Telequipment d56 description from 1968 catalog.pdf|D56 Description in 1968 Catalog]]
 }}
-The '''Telequipment D56''' is a 15 MHz dual-channel dual beam oscilloscope
+The '''Telequipment D56''' is a 15 MHz dual-channel dual beam oscilloscope produced in the late 1960s.
-produced in the late 1960s.
 It uses a mix of tube and solid-state circuitry.
 In the absence of a D56 manual, the closest manual is that of the [[Telequipment_D55|D55A]], which is an all-tube scope from 1963.
-==Specifications==
+{{BeginSpecs}}
-* Frequency Range between DC and 15 MHz (-3 dB).
+{{Spec | Bandwidth | DC to 15 MHz (-3 dB) }}
-* Vertical Sensitivity between 10 mV/div to 50 V/div in 1-2-5 steps and including a 10x multiplier switch.
+{{Spec | Rise time | 23 ns }}
-* Rise Time in the area of 23 ns or more.
+{{Spec | Deflection | 10 mV/div to 50 V/div, 1–2–5, and ×10 magnifier }}
-* Input Impedance 1 MΩ // 40 pF.
+{{Spec | Input Impedance | 1 MΩ // 40 pF }}
-* Sweep Rates between 500 ns/div to 5 s/div in 1-2-5 steps in calibrated mode with a 1-10 variable multiplier.
+{{Spec | Sweep Rate | 500 ns/div to 5 s/div, 1–2–5, and ×10 magnifier }}
-* 10 MHz time calibrator (intensity modulated marker) on ch 1 using Timebase A.
+{{Spec | Features | 10 MHz time calibrator (intensity modulated marker) on CH11 using Timebase A }}
-* Mains 90 - 240 VAC, 50 Hz, ca 275 VA.
+{{Spec | Power | 90 - 240 VAC, 50 Hz, ~275 VA }}
-* Dimensions 24 cm x 43 cm x 48 cm.
+{{Spec | Dimensions | 24 cm × 43 cm × 48 cm }}
-* Weight 59 lbs.
+{{Spec | Weight | 26.7 kg (59 lb) }}
+{{EndSpecs}}
-==Differences between D56 and D55A==
+==Internals==
+===Differences between D56 and D55A===
 The main differences between D56 and D55A are the following:
 * Both have 15 MHz Bandwidth.
 * 10 mV/div compared to 100 mV/div Sensitivity.
-* Circuit Boards are used more consistently apart from the Vertical Amplifiers.
+* Circuit boards are used more consistently apart from the vertical amplifiers.
-* Mixed Transistors and Tubes. Still many tubes, but adding transistors gives more possibilities.
+* Mixed transistors and tubes. Still many tubes, but adding transistors gives more possibilities.
-==Tubes==
+===Tubes===
 * 35 tubes + CRT (same CRT as in the D55A).
-* Vertical Amplifiers (each): 2xEF184, 2xECC88, 2xE810F.
+* Vertical Amplifiers (each): 2×[[EF184]], 2×[[ECC88]], 2×[[E810F]].
-* Horizontal Amplifiers (each): V101: ECF80, V102 ECF80, V103: ECC88, V104: ECC88, V105: EB91, V106: ECF80, V107: ECF80, V108: ECF80, V109: ECF80.
+* Horizontal Amplifiers (each): V101: [[ECF80]], V102 [[ECF80]], V103: [[ECC88]], V104: [[ECC88]], V105: [[EAA91]], V106: [[ECF80]], V107: [[ECF80]], V108: [[ECF80]], V109: [[ECF80]].
-* Time Delay: V302: ECC88, V303: ECC88.
+* Time Delay: V302: [[ECC88]], V303: [[ECC88]].
-* Trace Blanking: V304: ECC88, V305: ECC88, V403: EF184.
+* Trace Blanking: V304: [[ECC88]], V305: [[ECC88]], V403: [[EF184]].
-* Regulators Board ? PC23: V301: ECC88.
+* Regulators Board ? PC23: V301: [[ECC88]].
-* Regulators Board PC24: V401: EL86, V402: ECF80.
+* Regulators Board PC24: V401: [[EL86]], V402: [[ECF80]].
 * CRT: 5" flat-face, double gun, P1 phosphor. 1374K G.E.C.
-==Transistors==
+===Transistors===
 * Nine germanium PNP transistors.
 * Motorola T-119, TO-92, germanium, PNP: TR251, TR252, A; TR101, TR102, B; TR101, TR102. 6 pcs. total.
@@ Line 70: / Line 72: @@
 _TQD56_PC25 20240212.jpg | Rear Board on Vertical Side
 </gallery>
+==Components==
+{{Parts|Telequipment D56}}
 [[Category:Telequipment]]
-[[Category:CRT based analog mixed tube and transistor scopes]]
+[[Category:Tube scopes]]