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6AH4, Tube 6AH4; Röhre 6AH4 ID75649, Triode, vacuum | Radiomuseum.org
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6AH4GT, Tube 6AH4GT; Röhre 6AH4GT ID4561, Triode, vacuum | Radiomuseum.org
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2 NOS GE 6AH4-GT Vacuum Tubes - 1960's Vintage Triodes for Audio Amps | eBay
