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453: Difference between revisions
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The Tektronix 453 is a portable 50MHz dual-trace oscilloscope | The Tektronix 453 is a portable 50MHz dual-trace oscilloscope | ||
[[introduced in 1966]] and | [[introduced in 1966]] and produced until the mid-1970's. | ||
Initial versions had Nuvistor tubes in the front end | Initial versions had Nuvistor tubes in the front end | ||
as cathode-follower voltage buffers. Later versions used FETs | as cathode-follower voltage buffers. | ||
for the same purpose. The vertical amplifier that drives | Later versions used FETs for the same purpose. | ||
the CRT deflection plates is a cascoded differential amplifier | The vertical amplifier that drives the CRT deflection plates | ||
made of NPN transistors. Triggering uses tunnel diodes, | is a cascoded differential amplifier made of NPN transistors. | ||
with a trigger preamplifier preceding | Triggering uses [[tunnel diodes]], | ||
The 453 is almost entirely solid-state even in its first version. | with a trigger preamplifier preceding the actual trigger circuit. | ||
The only tubes other than the CRT are the [[5642]] HV rectifiers and | The 453 is almost entirely solid-state, even in its first version. | ||
a few [[8393]] Nuvistor triode tubes. Each horizontal deflection plate | The only tubes other than the CRT are | ||
the [[5642]] HV rectifiers and | |||
The total CRT acceleration is 10kV. The CRT cathode voltage | a few [[8393]] Nuvistor triode tubes. | ||
is -2kV and the CRT anode voltage is +8kV. | Each horizontal deflection plate is | ||
A Tektronix 453 consumes 100 watts power and weighs 29 pounds (13.2kg). | driven by a common-emitter amplifier with feedback. | ||
The total CRT acceleration is 10kV. | |||
The CRT cathode voltage is -2kV and | |||
the CRT anode voltage is +8kV. | |||
A Tektronix 453 consumes 100 watts power | |||
and weighs 29 pounds (13.2kg). | |||
The 453 came with a rigid metal cap that protects the face of the scope | The 453 came with a rigid metal cap | ||
while it is in transit. This cap has a compartment | that protects the face of the scope while it is in transit. | ||
for storing probes and accessories. Inside the 453, | This cap has a compartment for storing probes and accessories. | ||
the electronics are rather densely packed in order for | Inside the 453, the electronics are rather densely packed | ||
the scope to be compact. The top and bottom cover of the case | in order for the scope to be compact. | ||
The top and bottom cover of the case | |||
separate simultaneously using and ingenious clasp. | separate simultaneously using and ingenious clasp. | ||
Removing the rear cover exposes the remaining fuses and circuitry. | Removing the rear cover exposes the remaining fuses and circuitry. | ||
There are two trigger/sweep units in a 453, | There are two trigger/sweep units in a 453, | ||
thereby enabling delayed sweep mode. There are two delayed sweep modes: | thereby enabling delayed sweep mode. | ||
There are two delayed sweep modes: | |||
"A sweeps after B" and "A triggerable after B". | "A sweeps after B" and "A triggerable after B". | ||