Tech808
Moderator Username: Tech808
Post Number: 17080 Registered: 8-2002
| Posted on Sunday, August 16, 2009 - 7:02 pm: |
|
AT - KW1 NO GROUND CB ANTENNA TUNER Installation and Operation Instructions The RF Limited AT-KW1 No Ground Antenna Tuner will eliminate a very wide range of standing wave's, including 10:1 or more. Why is this important? A standing wave can reduce talk range up to 50%. A standing wave of 3:1 can reduce talk range up to 23%. The AT-KW1 eliminate's these high VSWR situation's and increase's your talk range. FEATURES: * Maximizes transmitted signal by reducing reflected power, resulting in longer range. * Insertion loss of less than 1/4 watt. * Can be used with or without a lininear amplifier. * Will handle up to 1,000 watts peak power without signal degradation. * Reduces stress on transmitter, prolonging the life of your radio. * Compatible with any antenna system ~ single or dual antennas. * Does NOT need additional ground wires. INSTALLATION: #1 ~ Find a suitable location as close to the output of the radio or linear amplifier as practical. Keep the coax cables between the AT-KW1 and radio or amplifier as short as possible, without making the installation difficulate. #2 ~ Secure AT-KW1 to either a metal or plastic wall with screw's (Not Provided). #3 ~ Connect as shown in Figure 2, 3, or 4 (depenmding on your system). #4 ~ Perform the Tuning procedure as described below. TUNING PROCEDURE: #1 ~ Establish Reference Power Measurement a. ~ Connect as shown in Figure 1. b. ~ For this procedure, do NOT have the AT-KW1 or liearnamplifier (if used) installed in line. c. ~ Install a SWR / Wattmeter Meter inline as shown in Figure 1. d. ~ Make sure radio is set to AM mode. e. ~ Measure and Record the power out (average power) while transmitting with with NO modulation. f. ~ This is the "reference power". SAVE thuis number for later use. #2 ~ Next install the AT-KW1 and SWR/Wattmeter inline, refer to Figure 2 and 3. NOTE: If using a linear amplifier perform tuning procedure using Figure 2. Install amplifier after tuning using figure 2. Install amplifier after tuning as shown in Figure 4. #3 ~ Turn on the radio and set the SWR/Wattmeter to measure forward RF watts. IMPORTANT! A non-metallic screwdriver is supplied with the AT-KW1. Any adjustmemts to C1 or C2 must be done using this or any NON-METALLIC tool. FAILURE TO DO THIS MAY RESULT IN CATASTROPHIC FAILURE OF THE TRANSMITTER AND IS NOT COVERED UNDER ANY WARRANTY! #4 ~ Press and hold the PTT switch, and adjust C1 on the AT-KW1 (Figure 5) until the SWR the SWR/Wattmeter is set to the "regerence power" measurement. #5 ~ Switch the SWR/Wattmeter to calibrate or set, mode. #6 ~ Press and hold the PTT switch, and adjust the SWR/Wattmeter to calibrate or set, point. #7 ~ Switch the SWR/Wattmeter to SWR position. #8 ~ Press and hold the PTT switch and observe the standing wave, while adjusting C2 on the AT-KW1 to minimum reading. You should be able to adjust the standing wave to 1:1 to 1. #9 ~ Double check your work by repeating steps 5 and 6. Then switch the SWR/Wattmeter to the the SWR position and press the PTT switch. If everything was done correctly, the standing wave will be 1:1. #10 ~ Tuning complete! Remove wattmeter and connect as required. FIGURE #1 Reference Power Meter. RADIO ® SWR/Wattmeter ® 50-Ohm Load FIGURE #2 Standaerd Setup (Without Linear Amplifier) RADIO ® AT-KW1 ® ANTENNA Insert Inline SWR/Watt Meter between Radio & AT-KW1 FIGURE #3 Setup with Co-Phased Antennas Radio ® AT-KW1 ® Co-Phased Splitter ® Left Antenna & Right Antenna FIGURE #4 Setup with Linear Amplifiers Radio ® Linear Amplifier ® AT-KW1 NOTE! FINISHED! Lon~Tech808 N9CEF CEF#808~CVC#002 Radio Enthusiast!
|