[Elecraft] [OT] Antenna Question
Don Wilhelm
donwilh at embarqmail.com
Sun Aug 7 11:42:16 EDT 2016
Clipping a 17 foot wire to the top may be easier than adding an inductor.
Add at least one 33 foot counterpoise wire - or extend one of the 20
meter counterpoise wires with another clip-on 17 foot wire.
73,
Don W3FPR
On 8/7/2016 11:32 AM, john at kk9a.com wrote:
> That is a huge mismatch. Assuming that the portable 20m vertical is easily
> assessable I would just clip on an inductor at the base to make it resonant
> on 40m. If you have elevated radials you would have to put one there also
> or just lay the radials on the ground.
>
> John KK9A
>
> [Elecraft] [OT] Antenna Question
>
> rick jones n3ikq
> Sat Aug 6 22:58:39 EDT 2016
>
> Ok sorry for not providing enough info! Consider this scenario: I have a
> portable vertical with 4 counterpoise wires that is resonant on 20. Lets say
> I want to tune the antenna up on 40. I can have a tuner right at the base of
> the antenna OR I can just use a balun at the base of the antenna and use the
> built in ATU in the K3. Is there a difference in how much power is getting
> to the antenna? I assume the tuner at the base is the best option which
> always makes me doubt the usefulness of having an ATU built in to a rig in
> terms of getting the most power to the antenna. Am I on the right track?
> Thanks! Rick
>
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