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Find someone who has a calibrated spectrum analyzer (not an oscilloscope). Take a look at the output of the amplifier with the analyzer and see how much of the signal is on the correct frequency and how much of it is scattered around the entire HF/VHF spectrum in the form of harmonics, spurs and IMD, as well as how much is simply overwhelming the output and spilling onto adjacent channels.

Spectrum analyzers are expensive, but there's no other easy way to separate decent amplifiers from those made for CB, which are illegal to begin with and therefore have no industry standards to which the "builders" can be held.

[QUOTE="Beetle, post: 142972, member: 1066"] Find someone who has a calibrated spectrum analyzer (not an oscilloscope). Take a look at the output of the amplifier with the analyzer and see how much of the signal is on the correct frequency and how much of it is scattered around the entire HF/VHF spectrum in the form of harmonics, spurs and IMD, as well as how much is simply overwhelming the output and spilling onto adjacent channels. Spectrum analyzers are expensive, but there's no other easy way to separate decent amplifiers from those made for CB, which are illegal to begin with and therefore have no industry standards to which the "builders" can be held. [/QUOTE]

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