EXCLUSIVE FORUM FOR MACHINE DISMANTLERS AND REPAIR PEOPLE   >   Merrillville   >   Self Propelled   >   Air Brakes   >   Under 150 PSI   >   4-400A or 4-400C vacuum electron broadcast tube

4-400A or 4-400C vacuum electron broadcast tube


You are looking at an vacuum broadcast tube. It is either a 4-400A or 4-400C tube. It was in an Eimac 4-400A opened box but I am not certain that it is an Eimac 4-400A tube. There is no writing on the tube to further identify it. It has a 5 pin base.
It has a serial number of: 7S-13516
This tube was part of the inventory which was purchased when our radio station purchased a used Continental 317C Transmitter - 50 kilowatt from a major Philadelphia AM station. The transmitter has now been de-commissioned and this tube is no longer needed. Sellers personal note: "The Continental 317C transmitter is probably the best 50kw tube transmitter that was ever made." The 4-400 tube was one of the 4 different type of tubes used in this transmitter. This tube is clearly vintage.
I have provided 8 pictures so you will know exactly what the tube looks like. Please look at the pictures carefully because a picture says a thousand words - as they say. Also, note my text on one of the pictures - where I highlight the rub marks on the base.
This item is only being sold in the continental United States. NO FOREIGN SALES - SORRY.
Please check out some of my other Vintage electronics which I list from time to time.
Email me with any questions you may have.



4-400A or 4-400C vacuum electron broadcast tube 4-400A or 4-400C vacuum electron broadcast tube 4-400A or 4-400C vacuum electron broadcast tube 4-400A or 4-400C vacuum electron broadcast tube 4-400A or 4-400C vacuum electron broadcast tube 4-400A or 4-400C vacuum electron broadcast tube 4-400A or 4-400C vacuum electron broadcast tube 4-400A or 4-400C vacuum electron broadcast tube