454

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The Tektronix 454 is a 150 MHz portable dual-trace scope introduced in March 1967. It can be seen as an improved 453. The successor 454A was introduced in 1971.

The 454 is the fastest general-purpose Tektronix scope that does not use proprietary hybrid or integrated circuits. It uses a CRT with distributed vertical deflection plates.

Key Specifications

Bandwidth	150 MHz (454: 100 MHz @ 10 mV/div, 60 MHz @ 5 mV/div; 454A: 100 MHz @ 5 mV/div, 50 MHz @ 2 mV/div)
Deflection	5 mV/div to 10 V/div; 1−2−5; 454A: additional 2 mV/div
Sweep	50 ns/div (454A: 20 ns/div) to 5 s/div (1−2−5) plus ×10 magnifier, and variable; timebase B to 50 ms/div
CRT	T4540, P31 phosphor standard / P11 optional; +12/–1.96 kV acceleration
Weight	13 kg / 29 lb
Power	90–136/180−272 V, 48−440 Hz, 100–145 W

It is possible to cascade the CH1/CH2 input amplifiers to obtain a sensitivity of 1 mV/Div (454A: 400 μV/div) at a bandwidth of 33 MHz.

The 454 has two ±12 V probe power outputs for P6045 probes.

Internals

The 454 has a 140 ns delay line in the signal path after the input channel switching and before the main vertical amplifier. There is a phase equalizer after the delay line to mitigate the harm done to pulse fidelity by the delay line.

454 Modifications

The 454 came in several different modifiactions that were indicated on the field on the frontplate directly below the "454" lettering, left of the serial number field. Known modifications are

• MOD163D
• MOD210N - P6047 accessory probes come in 6 ft variant with extra accessories.

Pictures

454

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  454 with traces

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  'A' intensified during 'B' mode

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  454 with P11-CRT

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454A

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  454A Front

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  454A Bottom

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  454A Vertical amp

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  454A Top

Some Parts Used in the 454A

Part	Part Number(s)	Class	Description	Used in
155-0400-00	155-0400-00	Hybrid integrated circuit	vertical amplifier	454A
STD910	152-0310-00	Discrete component	5 mA, 7 pF tunnel diode	454 • 454A