[AMPS] RF filament choke for indirectly heated cathodes?

[measures]

>
>>  Ameritron does it right, but alas, no anode parasitic suppressor!
>>
>>  (((73)))
>>  Phil, K5PC >>
>> IT SEEMS TO ME THAT MAKES EVEN LESS SENCE!           HANK
>
>The designer of the Ameritron AL-1500 has stated here on this reflector
>that it is possible through proper lay-out 

€  (which he was unable to describe)

> and component selection to
>preclude the need for anode parasitic suppression on 8877 amps.
>
Ask an AL-1500 owner how many 8877s he went through during the warranty 
period..  I know of several cases where more than four tubes failed.  In 
one instance, six tubes reportedly failed.  According to a stability 
analysis program, the 8877 is capable of oscillation above 100MHz
.cheers. 

-  Rich..., 805.386.3734, www.vcnet.com/measures.  
end


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