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Я4С-91: Difference between revisions
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{{Plugin Sidebar | {{Plugin Sidebar | ||
|manufacturer=Vilnius Research | |||
summary=Dual Timebase | | |series=Soviet 7000-series clones | ||
image=Я4С-91_front.jpg | | |type=Я4С-91 | ||
caption=Я4С-91 front panel | |summary=Dual Timebase | ||
|image=Я4С-91_front.jpg | |||
introduced= | | |caption=Я4С-91 front panel | ||
discontinued= | | |introduced=(?) | ||
|discontinued=(?) | |||
|designers= | |||
|manuals= | |||
* [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)] | |||
}} | }} | ||
The '''Я4С-91''' is a dual timebase plug-in for [[Soviet 7000-series clones]]. It is roughly analogous to the Tek [[7B52]]. | |||
It features two [[Russian tunnel diodes|3И306К tunnel diodes]] in the timebase A trigger circuit. | |||
Significant differences to the 7B52 include: | |||
* slowest sweep speed 50 ms/div | |||
Significant differences to the | * no ×10 magnifier, direct access to 5 ns/div speed | ||
* slowest sweep 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 | ||
* delay time is set by a single-turn pot with a reduction drive, and it is not calibrated | * 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 | * 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 external trigger connector is a СР50-73 type. The trigger level control has no separate slope switch. Trigger levels left of centre are on the falling edge, and those right of centre are on the rising edge. This is similar to the way the trigger level control works on the 7B52. 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 main interconnect board, which also holds the timing capacitors, is made of a rather weak Paxolin- or FR2-like phenolic paper material rather than fibreglass, and the tracks appear to be silver plated. The example in the photos suffered a crack at one corner which caused a malfunction (triggering only after pressing the single-sweep-reset button, and trace offset to the left). | |||
The example in the photos is labelled in German. A version labelled in Russian also exists. | The example in the photos is labelled in German. A version labelled in Russian also exists. | ||
{{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 | ||
| Line 48: | Line 54: | ||
Я4С-91_capacitor_tape.jpg | Factory-added tape to insulate capacitors from side panel | Я4С-91_capacitor_tape.jpg | Factory-added tape to insulate capacitors from side panel | ||
Я4С-91_switched_pot.jpg | Cam-operated microswitch to select variable time/div | Я4С-91_switched_pot.jpg | Cam-operated microswitch to select variable time/div | ||
Я4С-91_interconnect_board.jpg | Interconnect board (Timebase B and output amplifier removed) | |||
Я4С-91 right internal.jpg | |||
Я4С-91 left internal.jpg | |||
</gallery> | </gallery> | ||
[[Category:Soviet 7000-series clones]] | |||
[[Category:Vilnius Research Institute products]] | |||