Sure, but it's very easy to design a low-loss broadband matching network to provide the required impedance transformation.
One HB amp of mine used a 16:1 transformer at the input for just that purpose. Ron AC7AC -----Original Message----- Phil, Your statement amplifies the difference between "ham assumptions" and reality. The data-sheet indications of gain do not consider the input impedance (and loading of the driver), that parameter is quite important in actual use -- if the amplifier does not provide a good load to the driving transmitter, then "all bets are off". 73, Don W3FPR On 12/20/2010 8:28 PM, Phil & Debbie Salas wrote: > "It's very unlikely any solid-state amplifier uses an input attenuator: > Transistors and FET's just don't have that much gain." > > The Ameritron ALS-600 has about a 15 ohm input impedance. Then they put a > series 35 ohm resistor for matching and reducing gain. > Phil - AD5X ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
