3
The MFJ-971 should reduce the SWR of most feed systems to 1:1.
If you cannot achieve 1:1, try increasing or decreasing the length of
your antenna. Also, you may find minimum SWR occurs at more than
one combination of control settings. To confirm you have selected
the BEST one, check your RF power output (Po). If output appears
abnormally low, try another INDUCTANCE position and repeat step 4.
Finally, if your are using the MFJ-971 for receive only, tune as
described in steps 2-3.
IN CASE OF TROUBLE: Your MFJ-971 is backed by our "No Matter What
(TM)" guarantee for one full year. If you have a problem with your
tuner, first carefully inspect interconnecting cables and antenna
leads for shorts or opens (use an Ohm-meter . If unable to solve your
problem, call 1-800-647-TECH for assistance.
TO SET QRP JUMPER POSITIONS (Figure 1A):
Place plugs on headers in position "A" for 6-Watt
sensitivity. TO
SET HIGH-POWER JUMPER POSITIONS (Figure 1B):
Place plugs on headers in position "B" for 300-Watt sensitivity.
CAUTION: Do not attempt to operate a high-power transmitter into your
MFJ-971 tuner when QRP meter sensitivity is selected. The meter
movement could be physically damaged.
