Portability is also an important consideration. If you plan on using a high-power amplifier with your tuner, choose one with a high-power rating. Some antenna tuners can handle more power than others. The next consideration is the power rating. If you need a tuner that covers a wider frequency range, be sure to check the specifications carefully to make sure it will work with your antenna. Most antenna tuners cover amateur radio bands, but there are some that cover a wider range of frequencies. The first step is to determine the frequency coverage you need. Other factors to consider are frequency range, power rating, and portability. The most important consideration is the antenna you will use with the tuner. There are many factors to consider when choosing the best ham radio antenna tuner for your needs. A tuner helps to ensure that the power delivered to the antenna is as efficient as possible. This is necessary because the impedance of an antenna can vary significantly over different frequency bands. The Need for Antenna TunersĪn antenna tuner is a device that matches an antenna’s impedance to a transmission line’s impedance. Another thing is the use of a preselector with a system of loops on the input. More advanced antenna tuner models provide operation with both unbalanced (coaxial) and symmetrical wired transmission lines or single wire antennas.Īs for the effect of the tuner on the reception, practical studies did not give positive results because the system is very broadband. Or to the coaxial cable used as the antenna feeder. Technically speaking, the antenna tuner converts the total resistance of the antenna-feeder device and leads it to the typical value inherent in your transceiver/receiver unit – 50 Ohm or 75 Ohm. The VSW in a particular transmission line depends only on the transmission line itself and the load connected to it. In reality, the antenna tuner has no effect whatsoever on the VSWR in the feeder. The antenna tuner supposedly improves the VSWR.In reality, the antenna tuner doesn’t tune the antenna, but any part of it! The antenna tuner supposedly tunes the antenna.The primary purpose of any ham radio antenna tuner is to match the passport value of the transmitter output impedance to the unknown or mismatched antenna feeder wave impedance on one or more bands to compensate for the reactance that occurs, thus increasing the efficiency of the entire system. These devices are particularly effective when fixing radio antennas and improving radio signals. A radio antenna can be strengthened using a tuner. It is very similar to a radio, but instead of being able to receive a radio station, it can pick up AM or FM signals. The combination of the Palstar HF-AUTO and HF-AUTO-R will allow for high-power remote operated analog autotuning with a power rating of 5 Watts to 1800 watts.ĭimensions: 9" wide x 6.5" high x 8" deepĬlick Here for compatiblity of your HF-AUTO with the HF-AUTO-R.The Buyer’s Guide What is an Antenna Tuner?Ī tuner is a device that amplifies the signal of an antenna. Like all Palstar products the HF-AUTO was designed by Hams for Hams carrying on the Palstar tradition for high-quality products designed and made in the USA. The null-moden cable connects the two units with a 3 wire RS-232 high-speed data connection. Free 100' null-modem cable supplied from Palstar or custom order a longer cable. The HF-AUTO-R has been tested for use up to 500'. The HF-AUTO-R allows for remote operation of the HF-AUTO base unit up to 500' away and duplicates all buttons, controls, and display info. The Palstar HF-AUTO-R is the full-function remote control unit for use with the HF-AUTO automatic antenna tuner.
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