[GreenKeys] 6AC7 tubes?

[Bruce Gentry]

The 6AK5 and 717 are both pretty "hot" tubes and  the 6AK5 with it's 
short leads works well into the  UHF region. The 717 is fine up to about 
150MC., where lead lengths become a problem.  I think the 6AC7 is good 
to maybe 50MC.,  but for an FM 10.7  or vintage television 21MC.  IF, it 
did a great job for the time.   Soon, 6AG5 or 6CB6 miniature tubes had 
replaced it, and they easily worked  for 45MC. television IF , as well 
as the RF amp and mixers in FM and television receivers.

       Bruce Gentry, KA2IVY


On 10/30/19 10:08 PM, Jim Haynes wrote:
> Is the 6AC7 a lot like an octal based 6AK5?  Then there's the 717A
> which seems to be a 6AK5 packaged in an octal base.
>
> Jim W6JVE
>
>     ---
>
>     "Ya can argue all ya wanna, but it's dif'rent than it was."
>     "No it ain't! No it ain't!  But ya gotta know the territory."
>         Meredith Willson, The Music Man
>

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