Я4С-90
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
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Front
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Three-quarter view
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Rear
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Я4С-90 and 7A26 Front
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Я4С-90 and 7A26 Rear
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Я4С-90 and 7A26 Threequarter
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Seal on rear of plugin locking side panel
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Vertical amplifier plug-in
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Components are mounted "flying" over the board
Comparison 7A18 vs Я4С-90 attenuators
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Attenuator top part with shielding
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Attenuator drum assembly
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Bottom view with removed outer shieldings
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Bottom view with removed shielding over 1:100 attenuator
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Bottom view with removed attenuators
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Comparison between Tektronix 7A18 and Я4С-90 attenuator assembly
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Comparison between Tektronix 7A18 and Я4С-90 attenuator module (1:10)
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Side by side comparison of a Tektronix and a Я4С-90 attenuator
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Tektronix attenuator module mounted in a Я4С-90 attenuator assembly
