[Amps] OT: Can someone ID this tube and its use ?

[N7KA at comcast.net]

It looks like some varia tion of a 4-1000A.  The metal base ring appears to have oval vent holes, whereas the 4-400, 4-250, and 4-125 had round vent holes.  Its not a 3-400Z,  3-500Z, or 3-1000  becase they do not have the metal base ring . 



If a 4-1000A variation it will have a glass envelope of about 5.25 inches, be about 9.25 high overall, and the pins will be about 0.375 diameter, and the metal base ring is about 4.625 diameter. 



Arne N7KA 


----- Original Message ----- 
From: "Pete Lancashire" <pete at petelancashire.com> 
To: amps at contesting.com 
Sent: Wednesday, April 1, 2009 8:26:20 PM GMT +00:00 Monrovia 
Subject: [Amps] OT: Can someone ID this tube and its use ? 

http://petelancashire.com/gallery/main.php?g2_itemId=7369 

Found 6 so far .. 

-pete 
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