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1. [Amps] measuring bandpass of a power amp with an NA (score: 1): Author: Dan Sawyer <dansawyer@earthlink.net>; Date: Sun, 08 Mar 2009 13:05:20 -0700; I have a couple solid state RF power amps to test. One question is: What is their bandpass? I connected a network analyser drive to the output and then took the NA input of the collectors. Accounting; /archives//html/Amps/2009-03/msg00243.html (7,111 bytes)
2. Re: [Amps] measuring bandpass of a power amp with an NA (score: 1): Author: jeff millar <jeff@wa1hco.net>; Date: Sun, 08 Mar 2009 20:05:35 -0400; Dan... The input impedance of a transistor at RF frequencies runs a few ohms, depending on a variety of factors, with high power meaning lower impedance. 30 dB in power means 1000:1 in power or about; /archives//html/Amps/2009-03/msg00244.html (8,578 bytes)

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