I have not really put the coals to it because I have some RG8-x in the shack I want to replace before I do.? However I ran it up to 1KW very very briefly.
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In all honesty I have been a ham for over 30 years and have never been around an amplifier that I could use as a reliable power meter.? I consider a good meter a requirement period no matter what you buy.? I don’t know if the SPE or Acom is any better.
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As you can see in my layout below I have the LP100 and 500 and a total of 5 couplers.
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You will love the LP100A. Larry makes great products.