Я4С-91: Difference between revisions
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* | * [http://www.04kn009.de/C1-122-Zeitbasis_R4C-91.pdf Я4С-91 time base manual] | ||
* [https://martinjonestechnology.files.wordpress.com/2017/02/r4c-91-technische-beschreibung-und-betriebsanleitung.pdf Я4С-91 Technical description and instruction manual (in German)] | |||
* [https://martinjonestechnology.files.wordpress.com/2017/02/r4c-91-kennkarte.pdf Я4С-91 Calibration certificate (in German)] | |||
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Revision as of 06:07, 10 May 2018
The Я4С-91 is a dual timebase plug-in for Soviet 7000-series clones. It is roughly analogous to the Tek 7B53A. It features a 3И306К tunnel diode in the timebase A trigger circuit.
Significant differences to the 7B53A include:
- slowest sweep speed 50 ms/div
- no ×10 magnifier, direct access to 5 ns/div speed
- timebase B always runs after timebase A and has no separate trigger
- timebase mode A+B actually displays 'A intensified by B' alternating with B
- delay time is set by a single-turn pot with a reduction drive, and it is not calibrated
- only timebase B has variable time/div
The external trigger connector is a СР50-73 type. The plugin contains a number of integrated circuits of type 130ЛА3, which is a TTL quad 2-input NAND gate in a surface-mount package, like a 7400.
The example in the photos is labelled in German. A version labelled in Russian also exists.
Key Specifications
Time/div | 50 ms to 5 ns |
---|---|
Trigger modes | norm, auto, single sweep |
Trigger sources | internal, external, external/10, line |
Links
Pictures
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Front
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Three-quarter view
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Left side internal
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Left side detail
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Timebase A PCB
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Tunnel diode in Timebase A trigger
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Right side internal
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Right side detail
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Timebase B PCB
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Output amplifier PCB
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Closeup of PCB construction
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Factory-added tape to insulate capacitors from side panel
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Cam-operated microswitch to select variable time/div