Be careful using the offshore unfiltered amps on 10 meters. The harmonics fall into the aviation navigation band. There is one made in Italy amp that is unfiltered. If you look at the company's web site the amps are listed as "not for US export". They were at Dayton and are now making US models. Best to only buy external amps that are marked FCC certified.
Ray
W8LYJ
Sent from my iPad
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