MFJ Super Hi-Q Loop Instruction Manual page 10

MFJ Super Hi-Q Loop™ Antenna
ON THE CONTROL HEAD CAN DAMAGE THE CONTROL HEAD OR OTHER
EQUIPMENT! See figure 6. Be sure the cable to the transceiver and the power supply (if used)
are connected.
3.) Plug the power supply into an 110Vac outlet.
4.) Place the control head ON-OFF switch in the ON position. The meter lamp should light at this
point. Leave the lamp ON during these tests. If the lamp does not light at this point immediately
unplug the power supply and double check everything up to this point.
CAUTION: If the meter lamp gets very dim or goes out during any of the following steps, or
any other abnormal condition occurs, shut off power immediately and consult the
troubleshooting guide.
5.) Cycle the loop to the bottom of it's tuning range by pushing in the AUTO BAND SELECT
"DOWN" button. Watch the meter lamp, it should remain illuminated. The FREQ "DOWN"
LED should light until the loop reaches the end of the tuning capacitors rotation (0-45 seconds)
and then extinguish. RELEASE THE "DOWN" BUTTON.
6.) Cycle the loop to the top of it's tuning range by pressing the AUTO BAND SELECT "UP"
button. The FREQ "UP" LED should light until the loop reaches the highest frequency and then
extinguish (approx. 20-45 seconds). RELEASE THE "UP" BUTTON.
7.) Cycle the SLOW UP and DOWN buttons. The FAST UP or DOWN LED should flash off and
on while the loop is tuning. The flashing FAST UP LED will extinguish when the upper tuning
range limit is reached.
If all of the tests work you are ready to apply RF to your new antenna. Continue with the following:
8.) Adjust your transmitter to any desired frequency between 10.1 and 29.7 MHz and apply a small
amount of unmodulated carrier to the loop (between 1 and 50 watts.) If the power is less than 30
watts be sure to set the RANGE switch to "LO".
9.) Press the "DOWN" AUTO BAND SELECT BUTTON. The FREQ "DOWN" LED should light
until the loop passes the frequency of the transmitter. A tone alert will sound and the FREQ
"DOWN" LED will extinguish.
10.) Release the AUTO BAND SELECT "DOWN" button and the tone should stop. A MOVE "UP"
or "DOWN" LED should light.
11.) Press the button by the LED that is lit and carefully watch the reflected power needle on the
meter. There will be a rapid dip in reflected power. Stop as close to the bottom of the dip as you
can.
Instruction Manual
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