How about an MFJ 910? I believe this is a small box with fixed caps that
can be switched to aid in finding a good match. Usually mounts at or
near the base.
I haven't seen anyone discussing this old trick in any of the MP-1/ATX
or other vertical threads. Swan, Master Mobile and others had these many
years ago for their particular types of mobile verticals.
Nick
WB4SQI
g4ilo@... wrote:
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Mine is that at the frequency where the Q is highest (hence strongest
signals) the impedance is not 50 ohms. As I de-tune the antenna, the
impedance changes and appears to give a better match. That's why I
think the MP-1 ideally needs some kind of matching unit at the base,
as indeed do many base loaded mobile whips.
Julian, G4ILO
--- In FT817@y..., Nick Marsh <nmar@e...> wrote:
g4ilo@q... wrote:
However, I found that you can be moving the coil
away from the point at which signals are loudest, in order to get
the
lowest SWR.
Anyone have a theory why this happens?
Nick
WB4SQI
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