What Are The Tube Manufacturer Codes?

[marty pollard]

I found sites with speaker codes and some tube codes but I can't find the Mullard manufacture code.

Pulled some Made in Gt. Britain ax7 tubes from a Silvertone organ.
Also a Japanese rectifier; Mazda maybe?

[rockon1]

You are looking for Philips manufacturing codes of which Mullard is a part of. They can be found here. Mullards should start with a B for the Blackburn plant.Bob

http://www.tube-classics.de/TC/Tubes/Valvo/Phlipscode.htm

[marty pollard]

Thanks.
I63
B6L3
So these are two ax7 manufactured in Blackburn, 3rd week of Dec. 1966.

For $20... woohoo!

And you know what?
They really do have a character and body even better that the Westinghouse I took out.

[hamfist]

Thanks.
I63
B6L3
So these are two ax7 manufactured in Blackburn, 3rd week of Dec. 1966.

For $20... woohoo!


Great score !

My favourite site for identifying tubes is http://www.tubemongerlib.com/gallery2/main.php . Should give you a lead on the Jap rectifier.

[Blue Strat]

Also a Japanese rectifier; Mazda maybe?

Actually, Mazda is a French tube brand. Japanese 5AR4s have a seam across the glass on top. Matsushita (parent of Sony) made a lot of tubes.

[Timbre Wolf]

Matsushita (parent of Sony) made a lot of tubes.
Small correction, Mike: Matsushita is the older name for the Panasonic company, not Sony.

- T