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The 434 is an analog [[CRT storage scope]] with two independent storage areas on the screen. | {{Oscilloscope Sidebar | | ||
It has a | title=Tektronix 434 | | ||
summary=24 MHz analog storage scope | | |||
image=434 Tek 4.jpg | | |||
caption=Tek 434 | | |||
introduced=1971 | | |||
discontinued=(?) | | |||
manuals= | |||
* [http://w140.com/tektronix_434_service.pdf Tektronix 434 Manual sn 500,000 and up (complete, PDF)] | |||
* [http://w140.com/434_below_B500000.pdf Tektronix 434 Manual sn below 500,000 (complete, PDF)] | |||
* [http://w140.com/tek_434.pdf Tektronix 434 Manual (incomplete, PDF)] | |||
}} | |||
The '''Tektronix 434''' is an analog [[CRT storage scope]] with two independent storage areas on the screen. | |||
It has a bandwidth of 24 MHz and uses a [[tunnel diodes|tunnel diode]] in its trigger circuit. | |||
The storage is done in the CRT itself, by trapping charge on a special fine grid | The storage is done in the CRT itself, by trapping charge on a special fine grid | ||
of isolated pads behind the [[phosphor]] where the electron beam is then blocked or released. | of isolated pads behind the [[phosphor]] where the electron beam is then blocked or released. | ||
There is a chopped two channel system and the fastest sweep time is | There is a chopped two channel system and the fastest sweep time is 20 ns/div. | ||
An option for a tube with higher sensitivity at high writing speeds was available (OPT. 01). | An option for a tube with higher sensitivity at high writing speeds was available (OPT. 01). | ||
The signal passes through rotary cam-operated input attenuators, then passes through an input amplifier | The signal passes through rotary cam-operated input attenuators, then passes through an input amplifier | ||
that is on a separate small board. The input amplifier contains a JFET source-follower buffer | that is on a separate small board. The input amplifier contains a JFET source-follower buffer | ||
that uses a [[2N5911|2N5911A]] (Tektronix part number 151-1032-00) biased with a drain current of 12. | that uses a [[2N5911|2N5911A]] (Tektronix part number 151-1032-00) biased with a drain current of 12.5 mA | ||
and Vgs of -0. | and Vgs of -0.26 V. The input amplifier has unity gain, high input impedance, and an output impedance of | ||
about | about 120 Ω. The input amplifier drives a Tek-made differential amplifier chip, part number [[155-0050-01]]. | ||
==Specifications== | |||
[[Category:Specifications needed]] | |||
''please add'' | |||
==Pictures== | |||
<gallery> | <gallery> | ||
Image:Tek 434.jpg | |||
Image:Tek 434 a.jpg | Image:Tek 434 a.jpg | ||
Image:434 Tek 2.jpg | Image:434 Tek 2.jpg | ||
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[[Category:400 series scopes]] | [[Category:400 series scopes]] | ||
Revision as of 10:25, 20 August 2014
The Tektronix 434 is an analog CRT storage scope with two independent storage areas on the screen.
It has a bandwidth of 24 MHz and uses a tunnel diode in its trigger circuit. The storage is done in the CRT itself, by trapping charge on a special fine grid of isolated pads behind the phosphor where the electron beam is then blocked or released.
There is a chopped two channel system and the fastest sweep time is 20 ns/div. An option for a tube with higher sensitivity at high writing speeds was available (OPT. 01).
The signal passes through rotary cam-operated input attenuators, then passes through an input amplifier that is on a separate small board. The input amplifier contains a JFET source-follower buffer that uses a 2N5911A (Tektronix part number 151-1032-00) biased with a drain current of 12.5 mA and Vgs of -0.26 V. The input amplifier has unity gain, high input impedance, and an output impedance of about 120 Ω. The input amplifier drives a Tek-made differential amplifier chip, part number 155-0050-01.
Specifications
please add
