[Amps] Life and gain of 3-500Z

[R L Measures]

On Jul 18, 2006, at 7:09 AM, k7rdx wrote:

> The tubes (3-500z`s) were from RF Parts. I replaced (Henry 3K repair
> job)some low hr Eimacs that one had developed a grid to filament  
> short. Gain
> was compared to a nos pair of Eimac`s.Higher zsac for a given Ep  
> and close
> to 10% more output for a given value of drive.Jim..

Amperex 3-500Zs have an avg. Mu of c. 190 compared to Eimac's 130.  I  
measure about the same PEP output from either brand, but Amperexes  
require c. 10% less drive to get there.

> ----- Original Message -----
> From: "Tom W8JI" <w8ji at w8ji.com>
> To: "k7rdx" <k7rdx at charter.net>; "Amps" <amps at contesting.com>
> Sent: Tuesday, July 18, 2006 3:14 AM
> Subject: Life and gain of 3-500Z
>
>
...
R L MEASURES, AG6K. 805-386-3734
r at somis.org