Contents
How close can VHF antennas be?
According to the standard, satellite TV antennas should be three feet away from VHF antennas and GPS antennas, and VHF antennas need to be no less than three feet away from GPS antennas.
How do I block radio interference?
How To Stop Radio Interference?
- Using wires with better shielding.
- Positioning the wires in a different angle.
- Using ferrite cores/chokes/beads.
- Replacing the speakers.
- Contacting the radio station or the owner of the transmitter.
- Contacting the FCC.
How do I reduce static on my radio?
How to Get Rid of Static on an In-Home Radio
- Try an antenna. For FM radio, antennas range from the dipole and rabbit-ear types for less than $10 to roof-mounted antennas for more than $150.
- Relocate your radio.
- Turn off electronics near your radio.
- Switch to MONO FM.
- Listen online.
How big of an area do you need for a VHF antenna?
The easy answer is that you should maintain a minimum mounting distance of at least 1/4 wavelength apart for the lowest frequency antenna within the same horizontal plane. For VHF antennas, that translates to roughly 19 inches.
What happens when you separate two VHF antennas?
Separating two antennas by three feet will cause a 30db drop in signal between the two antennas. So transmitting 50 watts on one transmitter could cause as much as 50 milliwatts of energy to travel down the feedline of the second antenna. For every foot of spacing, you’ll receive another 10db drop in power.
Which is the best antenna for VHF or UHF?
16: PRACTICAL VHF/UHF ANTENNAS Fig 16.8: Radiation pattern for a four element Yagi using Greenblum’s dimensions Fig 16.7: Optimum length of Yagi antenna as a function of num- ber of elements (ARRL Antenna Book) Table 16.2: Directivity opti- misation of six element Yagi-Uda array (perturba- tion of element lengths)
What is the impedance of a dipole antenna?
The impedance will be around 70 ohms for most installations, so that a 50-ohm coaxial cable would present a VSWR of around 1.4:1 at the transceiver end. A more robust construction can be achieved using tubing for the elements and moulded dipole centre boxes, available from a number of amateur radio antenna manufacturers and at radio rallies.