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Mystery 4E27 vacuum tube - 8001 transmitting tube - 257-B best tube
Mystery 4E27 vacuum tube - 8001 transmitting tube - 257-B best tube, Mystery 4E27 vacuum tube - 8001 transmitting tube - 257-B tube orders
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Mystery 4E27 vacuum tube - 8001 transmitting tube - 257-B best tube
Mystery 4E27 vacuum tube - 8001 transmitting tube - 257-B best tube, Unbranded 4E27 vacuum tubenew old stock - near perfect condition but not in original box approximately 6".
Description
Unbranded 4E27 vacuum tube
new old stock - near best perfect condition but not in original box.
approximately 6" overall height
tested
The 4E27 (also know as a 257-B and 8001) was designed in the 1940's. It is a beam power tube with a maximum plate dissipation of 75 watt.
Mystery 4E27 vacuum tube - 8001 transmitting tube - 257-B best tube
- Mystery 4E27 vacuum tube - 8001 transmitting tube - 257-B tube
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