Theory Of Operation - TennaTronix TurboTuner-2 User Manual

Theory of Operation

The TurboTuner-2 provides automatic tuning and control of
screwdriver antennas. It adjusts the antenna until the
minimum SWR is reached at the current operating frequency.
This is accomplished by using the "Tune" function of the radio
to supply RF power while the TurboTuner-2 moves the
screwdriver antenna up or down and constantly measures
the SWR until the minimum is found. Once found, the
antenna motor is stopped and the radio is placed back in
receive mode.
Note: For IC-7000, 7100, and 7200, the SWR meter inside the
radio is utilized. No RF connections are made to the
TurboTuner-2.
There are at least 3 basic pre-requisites to ensuring successful
antenna tuning:
1. The motor leads must be properly RF choked.
2. The antenna needs to be properly matched.
3. The coax cable to the antenna must be properly
choked.
One of many sources for information about all of the above
topics is www.k0bg.com.
Compatible Radios
The TurboTuner-2 is compatible with most Icom radios that
have a CI-V and Tuner jack, including the following:
IC-7200
IC-7100
IC-7000
If in doubt, send an inquiry to info@tennatronix.com
IC-706
IC-718
IC-746
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