On 30 sep, 19:11, tzitzikas wrote:
my antenna is (5 x wavelength) / 16 . it is ok or i must modificate it
to wavelength/4??? the horizontal part is about 45 meters and the
vertical is about 20 meters.

--
tzitzikas

Hello,

It can or cannot. It depends on your required coverage area, soil
characteristics and ground network. Assuming local coverage, it will
definitely work less then a vertical quarter or half wave fed over a
very good ground network.

When you have a relative bad ground circuit, you may only need a
capacitor in series with the antenna wire to do the matching. When you
have a good ground, you need an additional inductor.

When you provide some more info, you might get better feedback.

Best regards,

Wim
PA3DJS
www.tetech.nl