[ARC5] Stupid Question No.5036

[mac via ARC5]

You won't find such a parameter in the usual receiving tube data  
listings.  For a start would recommend a review of the VHF chapters in  
any 60s/70s and later ARRL handbooks.

Dennis D.  W7QHO
Glendale, CA

****************
On Jul 24, 2014, at 11:00 AM, Robert Eleazer wrote:

> I have a stupid question.
>
> Where in the usual tube data is the frequency response for the tube?
>
> I am considering replacing the 6BZ6 RF amp tube on a National NC-270  
> with a tube that will give better performance on 6 Meters.  The  
> 6GM6/6EW6 looks like a possibility but how do I know that the  
> performance on 6 Meters will be better?  It is a tube used in the  
> IF's of TV sets, and that sounds good, but I see no data that tells  
> what the frequency capabilities of tubes are.  The old ARRL handbook  
> had the max usable frequency for triode transmitting tubes but I do  
> not see similar data for other tubes anywhere.
>
> Thanks,
>
> Wayne
> WB5WSV
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