Я4С-90

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Revision as of 01:27, 11 February 2023 by Luebben (talk | contribs) (Added pictures & Info about the comparison of the 7A18 vs the Я4С-90 attenuators)
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Vilnius Research Я4С-90
Dual-trace vertical amplifier
Я4С-90 front panel

Compatible with Soviet 7000-series clones

Produced from (?) to (?)

Manuals
Manuals – Specifications – Links – Pictures

The Я4С-90 is a dual-trace vertical amplifier plug-in for Soviet 7000-series clones. It is roughly analogous to the Tek 7A18.

Significant differences to the 7A18 include:

  • has a bandwidth limiting switch like the 7A26

The input connectors are СР50-73 type.

The example in the photos is labelled in German. A version labelled in Russian also exists.

Key Specifications

V/div 5mV/div to 5V/div in 1-2-5 sequence
Vertical modes I, chop, add, alt, II

Links

Pictures

  • Front

    Front

  • Three-quarter view

    Three-quarter view

  • Rear

    Rear

  • Я4С-90 and 7A26 Front

    Я4С-90 and 7A26 Front

  • Я4С-90 and 7A26 Rear

    Я4С-90 and 7A26 Rear

  • Я4С-90 and 7A26 Threequarter

    Я4С-90 and 7A26 Threequarter

  • Seal on rear of plugin locking side panel

    Seal on rear of plugin locking side panel

  • Vertical amplifier plug-in

    Vertical amplifier plug-in

Comparison 7A18 vs Я4С-90 attenuators

  • Attenuator top part with shielding

    Attenuator top part with shielding

  • Attenuator drum assembly

    Attenuator drum assembly

  • Bottom view with removed outer shieldings

    Bottom view with removed outer shieldings

  • Bottom view with removed shielding over 1:100 attenuator

    Bottom view with removed shielding over 1:100 attenuator

  • Bottom view with removed attenuators

    Bottom view with removed attenuators

  • Comparison between Tektronix 7A18 and Я4С-90 attenuator assembly

    Comparison between Tektronix 7A18 and Я4С-90 attenuator assembly

  • Comparison between Tektronix 7A18 and Я4С-90 attenuator module (1:10)

    Comparison between Tektronix 7A18 and Я4С-90 attenuator module (1:10)

  • Side by side comparison of a Tektronix and a Я4С-90 attenuator

    Side by side comparison of a Tektronix and a Я4С-90 attenuator

  • Tektronix attenuator module mounted in a Я4С-90 attenuator assembly

    Tektronix attenuator module mounted in a Я4С-90 attenuator assembly

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