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Re: [Amps] Transceiver Output Impedance

 To: Re: [Amps] Transceiver Output Impedance "Peter Voelpel" Sun, 9 Mar 2008 23:23:27 +0100 mailto:amps@contesting.com>
 ```The amplifier is happiest when the load is equal to the typically designed Zout: 50 ohms resistive. That practical loads might be different is another story and designers have to take care of that by including circuitry to avoid unlinearity and overload. 73 Peter -----Original Message----- From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On Behalf Of Jim Brown > For maximum power transfer the output impedance and the load must be > the same. >NO! This is a major misunderstanding of the maximum power transfer theorem, which says that if a generator has a fixed >value of resistance (that is, we can change ONLY the load resistance) AND IS LINEAR AT ALL OPERATING CONDITIONS INCLUDING >LOAD VALUES, that maximum power will transferred when the resistances are equal. That is my saying Bottom line -- optimum load Z of a power amp is the impedance at which the amplifier, including its output filter circuitry, is happy. And the value of Z load is unlikely to be equal to the value of Z out. 73, Jim Brown K9YC _______________________________________________ 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] Transceiver Output Impedance, (continued) Re: [Amps] Transceiver Output Impedance, Peter Voelpel Re: [Amps] Transceiver Output Impedance, Saandy Eban Re: [Amps] Transceiver Output Impedance, Roger (K8RI) Re: [Amps] Transceiver Output Impedance, peter . chadwick Re: [Amps] Transceiver Output Impedance, David Cutter Re: [Amps] Transceiver Output Impedance, jeremy-ca Re: [Amps] Transceiver Output Impedance, Roger (K8RI) Re: [Amps] Transceiver Output Impedance, Carl Clawson Re: [Amps] Transceiver Output Impedance, Manfred Mornhinweg Re: [Amps] Transceiver Output Impedance, Jim Brown Re: [Amps] Transceiver Output Impedance, Peter Voelpel <= Re: [Amps] Transceiver Output Impedance, Manfred Mornhinweg