6С19П, Tube 6С19П; Röhre 6С19П ID18825, Triode, vacuum | Radiomuseum.org
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Russian and Chinese Tube Substitutes
6S19P tubes instead of 7233 tubes.? | diyAudio
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Tube List (Russian)
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electron Tube Data sheets - 6
The history of tube amplifier
A new card system for the Russian L3-3 tube tester.
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4 pcs 6N16B-V / 6021 / 6SN7 MELZ Double Triode Tube Gold Grid USSR NOS | eBay
6C19P Tube Soviet Damping Diode New in Box 1976 Lot of 10 pcs | eBay
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electron Tube Data sheets - 6
