Tag Archives: Kessler Engineering

Alpha 4040 Automatic Antenna Tuner, Kessler AT-AUTO, and 4o3a Tuner Genius – A Group of Stillborn Projects?

Alpha 4040 QRO Antenna Tuner Rendition (Exterior)

Alpha 4040 QRO Antenna Tuner Rendition (Exterior)

The original Alpha was working on a new Mega-Antenna Tuner, and the various successor owners of the Alpha IP (Intellectual Property) have occasionally mentioned the tuner online, but it has been years since any updates or a prototype was shown.  Last update in 2017 said the unit’s development was too immature to make it to even Beta-Testing.

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Do you have a Backup for your Auto-Tuner?

Many hams use various Auto-Tuners to couple their transceiver to their antenna system.  The amateur radio marketed Auto-Tuners use microprocessors to supervise the matching process, maintain remember settings in their memories, and in trying to minimize damages from errors.

The basics behind the electronics is the same – things are changed to provide the correct values to make the mismatched electrically appear as matched – or “coupled” in the historic sense – to the transceiver.

The Auto-Tuner may “sample” the transceiver’s signal to get an idea of where in the amateur bands the operations are, or the Auto-Tuner may track the band changes through any number of methods.

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