vacuum tube amplifier |
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navigate by keyword : 300b 5u4g 6n9 adjusting adjustment amplifier audio black blue body booster case electron five frame gain glare glint glitter handle high homemade intensifier kenotron knob lamp light magnifier octal old quality raiser rectifier repeater shelf switch toggle torch triode tube tumbler tuning turned vacuum valve vintage voltage wood |
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Vacuum tube amplifier with 300B triodes |
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