[AMPS] Tube 4-500A

[2]

>
>Hallo,
>
>I have been offered two boxed EIMAC 4-500A tubes.
>
>I know the 4-400A and gather the 4-500A is a hybrid but with a extra pin and
>10V @ 10.2A on filament.
>
//  The pinout is the same as a 4-400A.  Peak emission is about 20% 
higher.  Ft is 75MHz.  
cheerio

>Any info will be appreciated especially confirming the extra pin on base and
>pin configuration.
>
>
>
>73
>
>
>Wynand
>
>ZS6ARF
>
>
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>


-  R. L. Measures, 805.386.3734, AG6K, www.vcnet.com/measures.  
end


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