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## Re: [Amps] Calculation of Tube Impedance

 To: k0wa@swbell.net, amps@contesting.com Re: [Amps] Calculation of Tube Impedance TexasRF@aol.com Sat, 1 May 2010 15:13:17 EDT mailto:amps@contesting.com>
 ```Yes, I agree (E / I ) / K. Mental lapse before, sorry. 73, Gerald K5GW In a message dated 5/1/2010 12:51:14 P.M. Central Daylight Time, k0wa@swbell.net writes: I think it is Plate V divided by (Plate I times the "K" factor) or Resistance Anode = V/(I x 1.8) some people use 1.87 Lee K0WA ________________________________ From: "TexasRF@aol.com" To: df3kv@t-online.de; petervandaalen@kpnmail.nl; amps@contesting.com Sent: Sat, May 1, 2010 12:06:44 PM Subject: Re: [Amps] Calculation of Tube Impedance While it is the plate voltage swing that generates the rf power, it is customarily accepted that the k factor takes care of that issue. Plate V times plate I divided by k factor gives the complete answer. In actual practice, either method gets you close enough with the consequence of a slightly different loaded Q between the two methods. 73, Gerald K5GW In a message dated 5/1/2010 10:45:48 A.M. Central Daylight Time, df3kv@t-online.de writes: Peter, you are right 73 Peter -----Original Message----- From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On Behalf Of Peter van Daalen Isn't it the anode voltage swing instead of the anode voltage ? Pse discard if I'm wrong. 73, Peter, PE1E ----- Original Message ----- From: "Phil Clements" To: "'Lee Buller'" ; Sent: Thursday, April 29, 2010 9:57 PM Subject: Re: [Amps] Calculation of Tube Impedance snip...(Peter ) In the case of a tube running > AB2, (grounded grid) with an anode voltage of 4000 volts, and a current of > 1 > amp, the output impedance would be 2222 ohms. (E divided by the sum of 1 X > 1.8) The 1.8 is the K factor for the class of operation. > > (((73))) > Phil, K5PC > > > > _______________________________________________ > 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 _______________________________________________ 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 _______________________________________________ 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 ```
 Current Thread Re: [Amps] Calculation of Tube Impedance, Peter van Daalen Re: [Amps] Calculation of Tube Impedance, TexasRF Re: [Amps] Calculation of Tube Impedance, TexasRF <= Re: [Amps] Calculation of Tube Impedance, TexasRF Re: [Amps] Calculation of Tube Impedance, Vic K2VCO