Eric,
For a parallel pair of 4-400A's, use plate voltage divided by 1.8 times the
DC current. That will give you an value for impedance that is close enough
for all practical purposes.
David
KC2JD
-----Original Message-----
From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com]On
Behalf Of Patti
Sent: Tuesday, November 15, 2005 3:45 PM
To: amps@contesting.com
Subject: [Amps] Anode Impedance of 4-400A
Does anyone know the 'rough' load impedance of a pair of 4-400A's with 3500V
on the anode?
In some of EIMAC literature (W6SAI AS-1 Publication), there are tables,
which list it as 5000 Ohms. Is this for one tube, or two?
The 1982 ARRL Handbook contains a design with a pair. The PI network values
listed there, equate to a load of 5000 Ohms, with a Q of about 12.
I am just trying to cross a few items off of my list.
If someone can contact me off list, I would appreciate it.
Thanks
Eric Thielking
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|