[ARC5] 10 meter BC-454 - yet more

[Bill Fuqua]

   You know, not that anyone would actually do it, you could make just 
about any
sharp cutoff tetrode or pentode function as a remote cutoff tube using this 
technique.

73
Bill wa4lav


At 10:41 PM 2/4/2013 -0800, Ian Wilson wrote:
>The 6AC7, according to the data sheet, is either sharp cutoff or remote
>cutoff depending on how you control the screen grid:
>
>*When a fixed screen voltage is used, as shown in condition 1, a
>sharp-cutoff*
>*characteristic is obtained.*
>*
>*
>*When a screen resistor is used, as shown in condition 2, an extended cutoff
>*
>*characteristic is obtained which may be utilized in applications where the*
>*gain is controlled by variation of the grid bias.*
>
>(GE data sheet).
>Condition 1: 150v fixed screen voltage.
>Condition 2: 60k screen resistor to +300v.
>
>73, ian K3IMW
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