DIY : Double CAT and FT857d

There an issue of using YAESU “FT857d” transceiver CAT control in conjunction with the YAESU antenna tuner “FC40”. It controlled through the CAT. Thus it is not possible to use the CAT together (example with E-LOGBOOK or other devices) through the same CAT Port. While developing “FT857d” transceiver the YAESU engineers have envisaged a baypass…

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Be on the air with just some meters of wire

Can be used with reduced efficiency up to 150 MHz Principle of operation: Usual internal tuners or external tuner only have a limited impedance range. The matching of a short wire (short in comparison to the wavelength) with it’s high impedance is usually not possible. Further the wire is usually outdoors, the tuner sets in…