De-tuning the antenna by pencil ?

[Boki]

Hi All,
Did you ever try/heard that De-tuning the antenna by pencil ?
How and why?

Best regards,
Boki.

 

[Art]

Any conductor attached to an active antenna will change it's effective
electrical length changing the resonant frequency, therefore detuning it.
That is, unless the additional conductor is also a fundemental length at
resonant frequency or is being added as a reflector or director element of
the array.
The graphite in a normal pencil is conductive, and very probably will not be
the proper length to resonate, it will tend to detune the antenna.

 

[Boki]

Any conductor attached to an active antenna will change it's effective
electrical length changing the resonant frequency, therefore detuning it.
That is, unless the additional conductor is also a fundemental length at
resonant frequency or is being added as a reflector or director element of
the array.
The graphite in a normal pencil is conductive, and very probably will not be
the proper length to resonate, it will tend to detune the antenna.

I got it know, thank you very much!

Best regards,
Boki.

 

[Joel Kolstad]

The graphite in a normal pencil is conductive, and very probably will not be
the proper length to resonate, it will tend to detune the antenna.

Additionally, I imagine that often there's still enough moisture in the wood
to slightly detune the antenna as well.