[Heathkit] SA-2550 Antenna Matcher

[Robert & Linda McGraw (K4TAX)]

Basically, all "antenna tuners" are best and correctly described as 
impedance matching networks, be they simple or complex.  Although we 
generically use the term "antenna tuner" to describe  the device between the 
feedline and the radio and it is connected to the radio port on the radio 
marked "antenna" while the other end of the feedline is actually connected 
to the radiating device commonly known to be "the antenna".  I do think the 
description "antenna tuner" is quite adequately understood by most folks. 
To that end, I see very few instances where the antenna is actually 
connected to the radio.

A point of semantics, I'd suppose.

73
Bob, K4TAX



> From the Heathkit book:
>
> "It is important to note that the SA-2550 is not a "tuner".
> It is a "matcher" designed specifically for use with single or multi-band 
> half-wave dipoles, inverted-Vs, and 1/4 wave antennas.  It is not for use 
> with 50 ohm beams, random wires, or balanced feedwire antennas."
>
> "To use the SA-2550 to its fullest requires you to lengthen your existing 
> antenna by 5 to 15%."
>
> "Proper operation requires an external dual wattmeter or SWR bridge."
>
> "Very rare".