Mystery 4E27 vacuum tube - retailer 8001 transmitting tube - 257-B tube View larger
  • Mystery 4E27 vacuum tube - retailer 8001 transmitting tube - 257-B tube
  • Mystery 4E27 vacuum tube - retailer 8001 transmitting tube - 257-B tube
  • Mystery 4E27 vacuum tube - retailer 8001 transmitting tube - 257-B tube
  • Mystery 4E27 vacuum tube - retailer 8001 transmitting tube - 257-B tube
  • Mystery 4E27 vacuum tube - retailer 8001 transmitting tube - 257-B tube

Mystery 4E27 vacuum tube - retailer 8001 transmitting tube - 257-B tube

Mystery 4E27 vacuum tube - retailer 8001 transmitting tube - 257-B tube, Mystery 4E27 vacuum tube - 8001 transmitting tube - 257-B tube offers

$65.00

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$45.50

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Mystery 4E27 vacuum tube - retailer 8001 transmitting tube - 257-B tube

Mystery 4E27 vacuum tube - retailer 8001 transmitting tube - 257-B tube, Unbranded 4E27 vacuum tubenew old stock - near perfect condition but not in.

Description

Product Name: Mystery 4E27 vacuum tube - retailer 8001 transmitting tube - 257-B tube

Unbranded 4E27 vacuum tube
new old stock - near perfect condition but not in original box.
approximately 6" overall height
tested

The 4E27 (also know retailer 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.

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Mystery 4E27 vacuum tube - retailer 8001 transmitting tube - 257-B tube