THE GREAT MULLARD MAGIC BLOG — tube

WHAT'S INSIDE A VALVE (vi)

Posted by STEVE M on

WHAT'S INSIDE A VALVE (vi)

After a little diversion, let's get back on track looking at the inside of valves, today we'll look at the ANODE. A valve anode typically is shaped as a hollow open topped cylinder, which surrounds a central cathode and any other electrodes. Although the cylindrical type is most commonly encountered due to it’s efficiency in both electron capture and heat dissipation, oval or flat pates may also be used. The anode’s purpose is to receive the electrons emitted from the cathode. This happens because the anode has a positive applied potential, which attracts the negatively charged electrons. Indeed, often the...

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THE JAN CODE - WHAT DO THE ALPHANUMERIC AND ALPHA CODES MEAN?

Posted by STEVE M on

THE JAN CODE - WHAT DO THE ALPHANUMERIC AND ALPHA CODES MEAN?

Hi peeps, well, in response to another valve related query, this time about 'JAN codes', I thought I would pen a little information nuggett here today. I shall be doing a further more detailed blog entry on military coding history and types soon but for now here's a quick info - bite. The JAN code is of course the US Military Joint Army Navy coding introduced in 1942 in which the code for a particular valve type comprises of an alphanumeric code, for example VT-114 and additionally a three digit alpha code. I will deal with the former in more...

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