I have built several passive grid driven tetrode amps with normal screen
voltage applied. One was with 4-400's and the other a 4CX1500A. I
currently use a Johnson Invader 2000 which is a passive grid driven pair
On 1/28/2012 9:27 PM, Carl wrote:
> I dont see any reason why not. Ive done it with 4X1's and passive grid is
> used by a few current manufacturers with external anode tubes. National did
> that back in 1962 with the NCL-2000.....the rest of the world is finally
> catching up.
> ----- Original Message -----
> From: "Jim W7RY"<firstname.lastname@example.org>
> To: "AMPS"<email@example.com>
> Sent: Saturday, January 28, 2012 8:18 PM
> Subject: [Amps] 4-400 W Screen Voltage
>> Has anyone run 4-400s with screen voltage successfully in an amplifier
>> with passive grid (50 ohm load for the grid drive)? I have the hankerin
>> to build an amplifier with 3 of them.
>> It will be 160-10 meters.
>> Jim W7RY
>> Amps mailing list
>> No virus found in this message.
>> Checked by AVG - www.avg.com
>> Version: 10.0.1416 / Virus Database: 2109/4773 - Release Date: 01/28/12
> Amps mailing list
"I predict future happiness for Americans if they can prevent the government
from wasting the labors of the people under the pretense of taking care of
"We may consider each generation as a distinct nation, with a right, by the
will of its majority, to bind themselves, but none to bind the succeeding
generation, more than the inhabitants of another country."
Amps mailing list