Antenna tuner image11/13/2023 Marine version of AH-4 auto antenna tuner. Icom GM800 GMDSS MF/HF Marine Transceiver with Class A DSC A few nice Antenna tuner images I found: Image from page 499 of 'QST' (1915) Image by Internet Archive Book Images Identifier: qstamer00amer Title: QST Year: 1915 (1910s) Authors: American Radio Relay League Subjects: Radio Radio Publisher: Newington, Conn., etc.Retuning a memorized frequency takes approximately 1 second. To decrease the tune-up time, the Icom AT-141 automatically stores the matching conditions for up to 45 frequencies.It completes the Elecraft K-Line as it currently exists, and is designed to interface seamlessly with the K3 transceiver and KPA500 amplifier. The Icom AT-141 allows HF operation where antenna element length is restricted due to space. The KAT500 is a switchable-L autotuner that can match a large variety of loads.Just push the key on the transceiver, and the Icom AT-141 immediately tunes for a minimum SWR on any frequency in the HF marine band.For example, the tuner matches a 7 m long-wire antenna across 1.6-30 MHz. The Icom AT-141 matches all frequencies on the HF marine band.The antenna tuner can be conveniently installed near the antenna element. The Icom AT-141 is housed in a durable, completely weather resistant ASA case, with a rubber gasket.The AT-141 is ideal for maritime use and has all the necessary connections for the use of, eg, the backstay as a radio antenna for transmitting and receiving. The Icom AT-141 is an antenna tuner specifically designed for shortwave transceivers. Automatically By-passes Tuning to Improve Frequency Reception Completely Weather-Resistant Acrylic Case. Click below to see more information and specs on each model.Designed for the Icom GM800 GMDSS and Icom M802 SSB Radio. Use direct control from the front panel of interfaced Icom, Kenwood and Yaesu transceivers or simple "one touch" automatic RF-sensed tuning (except MAT-705). Depending on model, mAT-TUNERS operate from rig power or a supplied internal rechargeable battery for simplified operations, portable or anywhere. Each mAT-TUNER features excellent physical construction with quality, multi-level PC boards and sleek, lightweight machined black oxide aluminum cases. MAT-TUNER Automatic Antenna Tuners cover an extremely broad impedance matching range of 5-1500 ohms, to achieve SWR handling far in excess of a transceiver's internal ATU and of other external tuners. The mAT-k100 is covered by 1 year parts and labor warranty administered in the USA and Canada by Vibroplex. above 50 MHzTuning range: 5 to 1500 ohms impedanceNumber of Tuning Memories: 16,000 virtually instantaneous frequency and band changesTuning time: 0.1-5 seconds for full tune cycle, 0.1 seconds to recall previously stored memories Latching relays for ultra-low power operation dimensions (WHD): 5.125 x 1.625 x 7.875 in. Specifications of the mAT-K100 Automatic Antenna TunerFrequency Range: 1.8-54 MHz continuous, with built-in frequency sensor power Handling: 0.1-120 watts SSB/CW, 30 watts key-down digital modes 100 watts max. DC is provided by the radio with the included mAT-CK Kenwood control cable the mAT-CI Icom control cable is sold as an option.Compatible transceivers include TS-50, TS-450/690, TS480SAT (excluding HX version), TS-570, TS-590, TS-850, TS-870, TS-890, TS-990, TS-2000. This model handles up to 120 watts SSB and CW and 30 watts Digital or AM. It will tune dipoles, verticals, Yagis, long wire, or virtually any other coax-fed antenna. This was easily added by mounting a DPDT switch to the front panel, and connecting it appropriately, as seen in the pictures below. Tuning results are stored in 16,000 frequency memories and the tuner covers an impedance matching range of 5 to 1500 ohms which far exceeds the capability of the transceiver's internal automatic antenna tuner. This automatic antenna tuner is designed for modern Kenwood and Icom HF transceivers providing 1.8-54 MHz continuous coverage. The superior build quality of the MAT-TUNER mAT-K100 is evident with a high-quality multi-layer circuit board and a lightweight machined black oxide aluminum case. MAT-TUNER mAT-K100 Automatic Antenna Tuner
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