What is the best length for a long wire 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.
What is the impedance of a long wire antenna?
Impedance is highest on the lowest band. Note it is 6850 ohms on 80 meters, decreasing to 1360 ohms on ten meters. This is because more and more half waves are being fed from one feedpoint with increasing frequency….Counterpoises.
| Advantages | Disadvantages |
|---|---|
| inexpensive | require a tuner or matching system |
What happens if antenna is 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!
What is the radiation pattern of a long wire antenna?
Therefore, the radiation pattern of this type of antenna is unidirectional, as waves follow only forward path. Unlike the resonant type of antenna, here the length of the wire is inversely proportional to the frequency.
Does length of antenna matter?
So the answer is yes, size does matter, but bigger isn’t always better. It all depends on what your transmitting and receiving frequencies are. Theoretically, a longer antenna will have a greater range, but it is far more important for optimal radio performance that the length of the antenna matches the frequency.
What kind of wire does a QRP Low power antenna use?
It is a heavy duty QRP/Low Power antenna that uses #14 wire instead of the usual #16 wire used by our other QRP/Low power models. This antenna uses a 4 to 1 Guanella Current Balun that is rated at 250 watts, all stainless steel hardware, and covers the following ham bands: 2, 6, 10, 20, and 40 meters.
Which is the best QRP antenna for KX3?
The EndFed 40 m to 6 m Antenna is arguably one of the best field antenna choices you can make for QRP ops and is especially well matched with the KX3, FT-817, the KX1, and any other QRP rig with a tuner. Rich—K2UPS said: “The antenna arrived Saturday via priority mail.
Is there a no tune end fed half wave antenna?
QRPGuys Portable No Tune End Fed Half Wave Antenna. We continue our antenna offerings with this single band, 80m-10m end fed half wave wire antenna. It is designed as a highly portable wire antenna, easily set up as an inverted V, horizontal, sloper, or in the case of higher frequencies, a vertical radiator.
What kind of wire does a micro antenna use?
The “ Micro Series ” Off Center Fed antenna is made using #18 stranded insulated wire and a BNC to connect your coaxial cable. The GU4-HF-250-M balun, used on this antenna, uses the same cores that are used in the standard QRP OCF baluns. The balun enclosure is much smaller, 3″ x 2″ x 1″. The end insulators are made from 3/8″round fiberglass.