How long is a 20 meter end fed antenna?
A standard recommendation (see QST, March 1936, p. 32, “An Unorthodox Antenna”) is an 84′ long end fed and a 17′ long counterpoise (6.5′ for 20m).
How long is a 40 meter end fed antenna?
approximately 11.9 meters
The 10/20/40 End fed Antenna kit has a total length of approximately 11.9 meters. From the feed point first 10.1 meter antenna wire then a coil of about 35 uH and then another little 2 meters of wire.
Can an antenna be too long?
If you have any local transmitters on the AM band, then they can overload the early stages of your radio if your antenna is too long. You will hear the stations even though you’re not tuned to them! Otherwise go for it!
How long is a 20 meter dipole antenna?
Read more about . . . . Dipole Length Calculations.
| Approximate Lengths for HF Ham Band Dipole Antennas | ||
|---|---|---|
| Band (MHz) | Length (Feet) | Length (metres) |
| 7.0 MHz (40 metres) | 68.5 | 21.1 |
| 10.1 (30 metres) | 47.5 | 14.7 |
| 14.00 (20 metres) | 34.3 | 10.6 |
Does a long wire antenna have to be straight?
This is a length of wire that is run from your receiver to a point as far from the radio as possible. The antenna wire can be of any type that you can easily buy. Do not worry about keeping the wire straight across the room. Going around is fine and will not harm reception.
Does end fed antenna need to be straight?
K7MEM said: An end-fed half-wave can certainly be used vertically without any counterpoise. And it would also work on harmonic related bands. In fact it is a very common antenna for the QRP and portable op crowd.
How long is a 40-30-20-15 end fed antenna?
Suggested wire lengths: Bands Covered (meters) Wire Length (feet) Minimum Coax Length (Feet) 40-30-20-15 35-43, 49-63, 70-85 35 40-30-20-17 35-45, 54-64, 67-77 35 40-30-20-17-15-12-10 38-44, 55, 60, 68-73 50 80-40-30-20-17-15-12-10 68-73, 85, 92, 102, 120-125 65
What kind of antenna does center fed use?
End Fed Antenna Choices Recap End Fed Zepp uses ladder line for matching to coax End Fed Half Wave – even harmonics, requires special high impedance matching unit, high voltage at feed point
What is the standard length of an antenna?
A standard recommendation (see QST, March 1936, p. 32, “An Unorthodox Antenna”) is an 84′ long end fed and a 17′ long counterpoise (6.5′ for 20m). While these lengths have been shown to work well on many bands, which is helpful if you’re in a hurry to get on the air, read up on the topic and experiment.
How tall is the end fed half wave antenna?
Today it was completely over grass with a new trees quite close but otherwise very much like my yard. The rig (except for the tuner which was in bypass). Everything was as close to identical as i could make it in all three locations, even the height of the ends of the antenna off the ground.