6X4 ( EZ90 ) RCA Black Plates O Getter Tube Rectifier Made in USA – Vacuum Tubes Treasures
5 X 6X4 SYLVANIA TUBE. 1960s PROD. BLACK PLATES. SQUARE GETTER. 37. CB397
Electron tube 6C4P-EV (6Ц4П-EB) = 6Z4 (China) ~ EZ90 ~ 6Z31 ~ 6X4 - RETROSTORE.EU
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AUDIO VALVES: 6X4 CV493 CV4005 EZ90 U78 RECTIFIER – MULLARD MAGIC
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6X4 RCA NOS 1960's pair
EZ90 6X4 MULLARD BLACK PLATE NOS BOXED VALVE TUBE - Langrex
GE JAN 6X4WA Vacuum Tube General Electric 6X4 Tube - Etsy Australia
THERMIONIC TUBE DIODE ON BASE C/W '6X4' TUBE | IEC designs
6X4, Tube 6X4; Röhre 6X4 ID3258, Full-Wave Vacuum Rectifier | Radiomuseum.org
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6X4 - TekWiki
6X4 / 6X4WA / 6202 / EZ90 NOS Gleichrichterröhre
Bóng Đèn { Tube } : 6X4 USA
6x4 Tube Pair NOS Marconi Italy Ez90 Rectifier Tubes Amplifier Kondo U78 Valve for sale online | eBay
6X4 | RSD | DUO DIODE AUDIO TUBE At 8 € HT on Electols
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6X4 EZ90 MARCONI TUBE PREAMP PAIR KONDO GM70 NOS verstärker GLEICHRICHTER | eBay
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Tung Sol 6X4W Vacuum Tube Black Plates Ruggedized 6X4 Tube - Etsy
