old diode lamps different sizes table closeup several vacuum tubes for radio and |
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| navigate by keyword : vacuum equipment electrical lamp retro obsolete radio tube vintage electric history technology television amplifier old glass component electricity electronic electron cathode diode anode industry transistor pentode style transparent light power bulb antique device stereo audio set triode valve closeup background metal glowing science tubes technical electronics group ancient engineering lamps sizes table close |
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| Old diode lamps of different sizes on a table, close up. Several different vacuum tubes for old radio and TV |
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