[Amps] Active Antenna Tuners

[Pete Smith]

One of the great benefits of my SB-220 is the relatively wide range of 
feedpoint impedances that it seems to be able to match.  For example, my 
80-meter parasitic array is cut for 3525, and at 3.8 MHz the SWR is 
something over 3:1, yet the SB-220 finds a match within the range of its 
loading capacitor.  Similarly, on 40M, a shortened yagi cut for 7050 can 
still be loaded at 7250.

I am tempted to buy a modern linear, in order to have more power on 160 and 
to be able to work my exciter less hard.  I wonder, though, whether any of 
them have the range of output impedance matching capabilities that the 
SB-220 does, other than perhaps the Acom 2000A, which is a bit out of my 
price range.  Has anyone had any direct experience in this respect, 
specifically in switching from an SB-220 to a modern amp and still being 
able to load antennas in situations like this?

73, Pete N4ZR
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