The 6b4g seems to be a forgotten triode
Vacuum Tube - 6B4G, Triode, Power Amplifier | Antique Electronic Supply
6B4, Tube 6B4; Röhre 6B4 ID15255, Triode, vacuum | Radiomuseum.org
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6B4G @ The Valve Museum
Download - Vacuum-Tube-Shop
DIY 2A3 Amplifier
6S4S = 6C4C = 6B4G Matched Pair Svetlana Black Anode NEW NOS OTK RARE | eBay
DIY Audio Projects Forum • Convert a Lacewood 2.0 to a 6B4G SET?
6A7 Datasheet | Pentagrid Converter
Sylvania Technical Manual 1943
Sovtek 6B4G Matched | Tonefactory
IspraNet Audio: Direct Coupled Single Ended Amplifier
6B4G, Tube 6B4G; Röhre 6B4G ID3309, Triode, vacuum | Radiomuseum.org
Transformateurs de sortie pour amplificateurs à tubes (25 - 75 watts) à sortie unique - Haute-fidélité (Série 1627-1642) - Hammond Mfg.
6B4G JAN Sylvania “2A3” – Audiomix
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2PCS 6S4S / 6A3 / 6B4G / 6C4C POWER TRIODE AUDIO SVETLANA TUBES! NOS! RARE! | eBay
6B4G (ETC) PDF技术资料下载6B4G 供应信息IC Datasheet 数据表(2/2 页)-芯三七
Sylvania Technical Manual 1943
vacuum tube valve circuit Page 2 : Audio Circuits :: Next.gr
8045G Lux Japan made by NEC (DATA SHEET)
6B4G New Amp Build Issue | Page 4 | diyAudio
Info for 6b4g PP | diyAudio
TDSL Tube data [6B4-G]
RH Amplifiers: February 2014
