Mystery 4E27 vacuum tube - retailer 8001 transmitting tube - 257-B tube, Mystery 4E27 vacuum tube - 8001 transmitting tube - 257-B tube offers
$65.00
SAVE 30% OFF
$45.50
$0 today, followed by 3 monthly payments of $25.13, interest free. Read More
Mystery 4E27 vacuum tube - retailer 8001 transmitting tube - 257-B tube, Unbranded 4E27 vacuum tubenew old stock - near perfect condition but not in.
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.