Re: Unknown Valve

["Tesla list" <tesla@pupman.com>]

Original poster: "by way of Terry Fritz <twftesla@uswest.net>" <Mddeming@aol.com>

<Sorry, another what have I found question. 

The valve is a QY4-250 made by Mullard.  I have looked on a couple of web 
databases and had no luck.  Does anyone know the characteristics of this 
valve?  And the obvious question - Is it any good for a VTTC? 

B 

Dr Brian H Le Page 
Research Fellow 
Composites Research Group 
School of Mechanical and Materials Engineering 
University of Surrey 
Guildford 
Surrey 
GU2 7XH 
Tel. 01483 300800 x2439 
Fax. 01483 876291 
mailto:B.H.Le-Page@surrey.ac.uk> 

Hi Brian et al 
        Hope this may point your towards the info you need. 
        I found this in the history files of:<http://www.abdn.ac.uk/> 


http://www.abdn.ac.uk/ 
[Unable to display image] 


No. 60: Transmitting Valve QY4-250 
Mullard's QY4-250 is pictured here for its elegance more than its 
popularity. It is a VHF power tetrode, capable of operating at 250 watts: for 
the aficionado, a splendid bottle. 

John S Reid 

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