Radio > Antennas

Electrically Shortening/Adjusting a VHf antenna?

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GreekMan:
hi all!

is there a way to "shorten" a VHF dipole or groundplane, but not physically?

Like placing a ferrite bead on the root of the elements?

Tempstar:
Yes, capacitors in the Pf range. I have used a 15pf trimmer cap soldered across the connection at the antenna.

GreekMan:
indeed. I should have thought of it myself.

I guess efficiency will suffer a bit

BTW, at what voltage rating?

Tempstar:
I used 100 volt

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