Are J pole antennas directional?
The J-pole antenna, more properly known as the J antenna, is a vertical omnidirectional transmitting antenna used in the shortwave frequency bands.
Is AJ pole antenna balanced or unbalanced?
The J-pole is a good example of a poorly implemented feed system, because it mixes balanced and unbalanced systems. In the J-pole, an unbalanced end-fed half wave radiator is fed by a balanced 1/4 wave stub.
How do you build a 10 meter J-pole antenna?
The J-pole antenna is somewhat sensitive to surrounding metal objects, and should have at least a quarter wavelength of free space around it. The J-Pole is very sensitive to conductive support structures and will achieve best performance with no electrical bonding between antenna conductors and the mounting structure.
What is a J-pole antenna?
Our flagship model, The Two Meter J-Pole Antenna comes in two different configurations, either as a one piece antenna for base station use, or as a two piece breakaway model great for portable operations. The J-Pole makes a great base station and emcomm emergency communications amateur radio and scanner antenna.
How much does a roll up J pole weigh?
The 2-meter roll-up J-pole is lightweight (approx. 3 ounces), compact and effective! The antenna can be set up quickly and easily by hanging out a window, attach to a ceiling, or toss a lead sinker over a tree branch with kite string and hoist it up.
What is the SWR of the kb9vbr J-pole antenna?
The two meter antenna is tuned to 146MHZ (1.2:1 SWR or less at 146MHz), and the SWR is 1.4:1 or less throughout the entire 2 meter band. This antenna also works great as a dual band antenna. The antenna will tune up on 70cm for excellent dual band performance. Installing the KB9VBR J-Pole Antenna
What can I do with a J-pole?
The J-Pole makes a great base station and emcomm emergency communications amateur radio and scanner antenna. Works well with handheld HT radios, base stations, and repeaters.