7B50

The Tektronix 7B50 is a timebase plug-in for 7000-series scopes, particularly the 7500 series. It is specified for triggering up to 100 MHz. Triggering uses tunnel diodes. The sweep is fully discrete, no ICs.

Tektronix 7B50
100 MHz Timebase 7B50 front Compatible with 7000-series scopes Produced from 1969 to 1988 Manuals 7B50 Tektronix 7B50 Manual (OCR) Tektronix 7B50 Manual @ BAMA (PDF) 7B50A Tektronix 7B50A Manual (All manuals in PDF format unless noted otherwise)

Manuals – Specifications – Links – Pictures

There is also a 7B50A. According to Bruce Hofer,

The 7B50A was nothing more than a 7B80 with its fastest calibrated sweep rate limited to 5 nS/div via a modified cam-switch that locked out the 2 fastest settings.

The task of designing the 7B50 was inherited and completed by Murlan Kaufman.

Key Specifications

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X-Y operation

The 7B50 has a dedicated switch to put it in "amplifier mode" for X-Y operation. In this mode, the Trigger Source switch controls the signal source – internal from a vertical plug-in via the trigger path, or external — and the Trigger Coupling switch controls AC vs. DC coupling. In amplifier mode, gain can be varied using an uncalibrated potentiometer.

Pictures

7B50
7B50A
7B50A
7B50A bottom
7B50A rear
7B50A top
7B50
7B50

Custom ICs used in the 7B50

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Custom ICs used in the 7B50A

Page	Model	Part nos	Description	Designers	Used in
155-0109-00	M120B	155-0109-00 • 155-0109-01	trigger	Gary Vance	5B25N • 5B31 • 5B40 • 5B42 • 5B44 • 5S14N • 7B50A • 7B53A • 7B80 • 7B85 • 7B87 • 7B81P • 7B90P • 7S14 • 7612D • SC502 • SC503 • SC504
155-0126-00	M121	155-0126-00	trigger source selector and P-P auto amplifier	Art Metz	7B50A • 7B80 • 7B85 • 7B87 • 7B81P • 7B90P