User manual CG ANTENNA CG-3000 AUTOMATIC ANTENNA TUNER
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Manual abstract: user guide CG ANTENNA CG-3000 AUTOMATIC ANTENNA TUNER
Detailed instructions for use are in the User's Guide.
[. . . ] CG-3000 AUTOMATIC ANTENNA TUNER
INTRODUCTION
CG-3000 automatic antenna tuner (ATU) can cover whole HF amateur bands. It uses multi signal processing circuit to switch L/C to make perfect matching between your radio and antenna system. [. . . ] Never transmit or tune without an antenna. Do not touch the antenna when it's transmitting or tuning
Fig. 1
* The above 4 wires control cable is not provided. * 2 wires power cable is provided Red wire: +12VDC
Operation After verify all the connection, choose your desired frequency and switch the transmit mode to AM, PACKET or any other continuous mode. Press PTT key, CG-3000 will automatically tune. You will hear some "click click" noisy, it means CG-3000 is tuning. When you go back to the frequency which is tuned before, CG-3000 will pickup the existing L/C combination from memory setting and match the system. To reset the tuner, just simply disconnect the power or use optional control box.
Fig. 2
Ground system The CG-3000 must be connected to a good electrical ground. Good ground prevents shocks, interference and others. Use heaviest gauge wire or metal strap available to connect to as large as possible metal object. Install a quarter wave length of working frequency wire as counterpoise. [. . . ] Reduce the transmission coaxial cable as short as possible. Calculation of undesirable antenna lengths Length of half wave = 300 / operating frequency (MHz) X ½
Please avoid using the antenna length that is close to a half wave or multiple of a half wave in length [. . . ]
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