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==Internals== | ==Internals== | ||
Serials numbers from B010100 to B010786 use the [[154-0729-00]] CRT. | Serials numbers from B010100 to B010786 use the [[154-0729-00]] CRT. | ||
Starting with serial number B010787, the 154-0804-00 CRT is used. | Starting with serial number B010787, the [[154-0804-00]] CRT is used. | ||
Triggering is done using a trigger amplifier made of discrete bipolar transistors and | Triggering is done using a trigger amplifier made of discrete bipolar transistors and | ||
Revision as of 08:40, 4 June 2017
The Tektronix 442 is a 35 MHz dual-trace oscilloscope with a single timebase.
Specifications
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The anode voltage on the CRT is 10kV and the standard phosphor was P31.
A Tektronix 442 consumes 36 watts and weighs about 20 pounds.
Internals
Serials numbers from B010100 to B010786 use the 154-0729-00 CRT. Starting with serial number B010787, the 154-0804-00 CRT is used.
Triggering is done using a trigger amplifier made of discrete bipolar transistors and a 74S00 TTL quad NAND gate configured as a flip-flop.
The power supply is linear and regulated using op amps as error amplifiers.
The vertical and horizontal amplifiers are made of discrete bipolar transistors except for the dual-JFETs that are used as high-impedance buffers at the signal inputs.
