MFJ-969 DELUXE Versa Tuner II
6
TRANSMITTER control, but
power handling and efficiency
are reduced. (It is
normal for the TRANSMITTER setting to advance as operating frequency is
increased.)
6. Increase the transmitter power until the Forward power level is full scale (30 watts) and
observe the reflected power or SWR. If the reflected power and SWR are not
satisfactory, adjust the ANTENNA and INDUCTOR controls again.
NOTE:
If your transmitter can not reach 30 watts, set it to the maximum power available.
7. After a low SWR is obtained, the transmitter power may be increased to any value up
to 300 watts carrier or 300 watts PEP.
Your DELUXE VERSA TUNER II will reduce the SWR of most antenna systems to 1:1.
In a few rare cases, a perfect 1:1 SWR may not be obtainable. If this is the case, the length
of the antenna or the feedline can be changed slightly until a low SWR can be obtained.
See the antenna hints section.
In Case Of Difficulty
If this tuner
fails to tune,
please double check all connections and follow the tuning
procedures again. Be sure you are using enough inductance (a higher ROLLER
INDUCTOR number) and have the capacitors open far enough (a higher front panel
number).
If this tuner
arcs
at the rated power levels, please double check all connections and follow
the tuning procedures again. Be sure you are using the largest amount of capacitance and
lowest amount of inductance (lowest ROLLER INDUCTOR, TRANSMITTER and
ANTENNA numerical setting possible) that allows the load to be matched on the operating
frequency.
NOTE:
If this tuner arcs when operating on the 160 meter band, it may be necessary to
reduce transmitter output power. Power handling is the lowest on 160, and when
the load is a low resistance with capacitive reactance.
If you are still unsuccessful, but the tuner does adjust and operate when switched to the
TUNED DUMMY LOAD position or another antenna, please read the Antenna Hints text.
Grounding Hints
To minimize RFI, single wire feedlines (such as used with Windom or longwire antennas)
should be kept away from other wiring. Radiation will be minimized if the single wire
feeder runs parallel and reasonably close to the wire that connects the tuner to the outdoor
ground. The antenna feed wire should be adequately insulated to prevent arcing or
accidental contact.
