TM504

Manuals – Specifications – Links – Pictures

The Tektronix TM504 is a four-bay mainframe for the TM500 system. The rightmost compartment can supply a high-powered plug-in.

The TM504A is functionally identical, with the addition of a fan in the rear panel, and relocation of the power switch to the centre underside of the front panel. It was exclusively supplied as part of the F7523A1 MOD WQ Test Set, part number TS-4353-U, containing modules SG505 Mod WQ, SG505 Mod WR and AA501A Mod WQ.

Key Specifications

Plug-in Supplies	+33.5 V and −33.5 V, 1.4 A max shared by all compartments Low Power Compartments: 2 × 25 VAC, 0.5 A / 25 VA; floating ≤350 V (peak) per compartment +11.5 V, and 17.5 VAC with grounded centre tap, 3.6 A max shared between all three low power compartments High Power Compartment: 2 × 25 VAC, 1 A / 50 VA; floating ≤350 V (peak) +11.5 V, and 17.5 VAC with grounded centre tap, 4 A max shared between these two supplies
Power	100/110/120/200/220/240 V, 48 Hz to 440 Hz, max. 220 W
Weight	18.5 lbs (8.4 Kg)
Size	9.5" (24.1 cm) H, 12" (30.5 cm) W, 20" (50.8 cm) L

Option 2

TM504 Option 2 adds internal pin headers for each slot as well as rear 50-pin and BNC connectors, allowing for custom wiring to, from and between plugins.

Links

• F7523A1
• TM 504 Power Supply Lab Checkin and a SURPRISE! by Zenwizard Studios @ YouTube

Documents Referencing TM504

Document	Class	Title	Authors	Year	Links
Tekscope 1975 V7 N3.pdf	Article	A Potpourri of Modifications and Service Hints		1975	465 • 5L4N • 464 • 466 • 575 • 576 • 577 • TM504
067-1201-99 TM500 Power Module Constr Note.pdf	Application Note	TM500 Power Module Tester and Utility Power Supply	Warren Collier	1977	TM500 • TM501 • TM503 • TM504 • TM506 • TM515

Internals

The pass transistors on the low-power compartments are MJE2901 (151-0373-00, PNP) / MJE2801 (151-0349-00, NPN) − 60 V, 10 A, h_fE 25 - 100. The high-power compartment has MJ2955 (151-0258-00, PNP) / 2N6258 (151-0413-00, NPN), on later serial numbers replaced with 151-0140-00, a selected 2N3055.

Pictures

TM504

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  TM504 Front

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  TM504 Interior

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  TM504 3/4 view

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  TM504 Mod UB rear. GPIB connection for use with CG551AP

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  TM504 Mod UB rear closeup. GPIB connection for use with CG551AP

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  Top Open

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  Bottom Open

TM504A

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  TM504A Front

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  TM504A Rear

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  TM504A 3/4 View

Components

Some Parts Used in the TM504

Part	Part Number(s)	Class	Description	Used in
2N3055	151-0140-00	Discrete component	general-purpose silicon NPN power transistor	TM504 • TM506 • TM5006 • 7603 • 7613 • 7623 • 7623A • 7623B • 7633