Angel,
Actually it addresses link coupled tuners that with a tuned to resonance
using a balanced tank circuit. You can feed balanced lines from taps
placed equally out from center on the both coils. The center of the two
coils is common (ground), and unbalanced loads can be fed between the
tap on one coil and the common center connection.
The Johnson Matchbox is a bit different in that it uses a differential
variable capacitor to adjust the electrical position of the coil taps.
73,
Don W3FPR
On 3/25/2020 10:32 AM, Angel Garcia wrote:
> Don, is this comment about unbalanced vs balanced line tuners, or something
> specific to use of a balanced line tuner?
> Angel wa2vuy
> A good link coupled antenna tuning unit can cover a large range (Johnson
> Matchbox is one example), and has many benefits that can be used today,
> but few know how to use it to advantage.
>
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