[Amps] 813 efficiency

[Roger (K8RI)]

On 2/23/2013 5:19 PM, Bill Turner wrote:
> ORIGINAL MESSAGE:
> On Sat, 23 Feb 2013 10:01:55 -0500, Eddy wrote:
>
>> It absolutely gobsmacks me how some guys in this hobby would rather whip-out the ol' VISA card & spend literally HUNDREDS on power amplifier tubes, when the lowly ol' 813---paired with some twins, of course!---will do the job as well, and at an absolute FRACTION of the price...
>
> REPLY:
> To get the plate dissipation of a single 8877 would take 12 813s.
>
> Would you put them all in a row?  Or a matrix of 3x4? Or 6x2?
> Or maybe in a circle?  Can't wait to hear.  :-)This reminds me of a conversation I had on
>

This reminds me of a conversation I had on 40 late one evening a bit 
over a year ago. Time and age being what they are, the specifics are  in 
the haze. I think he was down in Georgia or at least one of those states 
down there. He had one whale of a signal and when I commented on it he 
told me about his amp.  It was either 6 or 8, 813s and he was pushing 
them hard. IIRC he used it on 75 and 40.

I never did find out how he had them configured, but just trying to 
visualize that puts my mind into overload, but I'm pretty sure it wasn't 
in a line.<:-))

Apparently he had a bunch of them and figured, Why not" or he was just 
good at telling stories.

73

Roger  (K8RI)
> Bill, W6WRT