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Re: [Amps] 813 efficiency

To: amps@contesting.com
Subject: Re: [Amps] 813 efficiency
From: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Mon, 25 Feb 2013 11:31:47 -0500
List-post: <amps@contesting.com">mailto:amps@contesting.com>
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


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