434: Difference between revisions

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The signal passes through rotary cam-operated input attenuators, then a JFET source-follower buffer
The signal passes through rotary cam-operated input attenuators, then a JFET source-follower buffer
that uses a [[2N5911|2N5911A]] (Tektronix part number 151-1032-00).
that uses a [[2N5911|2N5911A]] (Tektronix part number 151-1032-00) biased with a drain current of 12.5mA
and Vgs of -0.26V. 


* [http://w140.com/tektronix_434_service.pdf Tektronix 434 Manual sn 500,000 and up (complete, PDF)]
* [http://w140.com/tektronix_434_service.pdf Tektronix 434 Manual sn 500,000 and up (complete, PDF)]

Revision as of 16:21, 14 July 2013

The 434 is a analog CRT storage scope with two independent storage areas on the screen. It has a bandwith 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 20ns/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 a JFET source-follower buffer that uses a 2N5911A (Tektronix part number 151-1032-00) biased with a drain current of 12.5mA and Vgs of -0.26V.

Tek_434 analog storage scope