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Having owned the Imax and switching to a sirio 2016 . I'll take the aluminum any day over the fiberglass ..mainly cause the receive seems quiter .I never owned the maco but I would think results would be similar.also those fiberglass do have great swrs ,but so do dummyloads
If ya already have a swr of 1.1 trying to improve that is a waste.in fact anything below a 1.5 is acceptable.I always try to keep my reactance or X as low as possible ,even if it slightly raises swr.next I try to get my impedance or R as close to 50 ohms as possible. All this before I worry...
The colossal 10k is built way better than the sirio . And most likelybetter then spt500 and maco..it should perform just as good as the sirio ...not sure about better.
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