Я4С-91: Difference between revisions
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caption=Я4С-91 front panel | | caption=Я4С-91 front panel | | ||
series=[[Soviet 7000-series clones]]| | series=[[Soviet 7000-series clones]]| | ||
introduced= | | introduced=(?) | | ||
discontinued= | | discontinued=(?) | | ||
manuals= | |||
* ''please add'' [[Category:Manual needed]] | |||
}} | }} | ||
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. | 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 [[Russian tunnel diodes|3И306К tunnel diode]] in the timebase A trigger circuit. | |||
Significant differences to the 7B53A include: | Significant differences to the 7B53A include: | ||
* slowest sweep speed | * 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 B always runs after timebase A and has no separate trigger | ||
* timebase mode A+B actually displays 'A intensified by B' alternating with B | * timebase mode A+B actually displays 'A intensified by B' alternating with B | ||
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{{BeginSpecs}} | {{BeginSpecs}} | ||
{{Spec | Time/div | | {{Spec | Time/div | 50 ms to 5 ns }} | ||
{{Spec | Trigger modes | norm, auto, single sweep }} | {{Spec | Trigger modes | norm, auto, single sweep }} | ||
{{Spec | Trigger sources | internal, external, external/10, line }} | {{Spec | Trigger sources | internal, external, external/10, line }} | ||
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<gallery> | <gallery> | ||
Я4С-91_front.jpg | Front | Я4С-91_front.jpg | Front | ||
Я4С-91_threequarter.jpg | | Я4С-91_threequarter.jpg | Three-quarter view | ||
Я4С-91_left_side_internal.jpg | Left side internal | Я4С-91_left_side_internal.jpg | Left side internal | ||
Я4С-91_left_side_detail.jpg | Left side detail | Я4С-91_left_side_detail.jpg | Left side detail | ||
Revision as of 06:34, 4 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
