Adjustment Procedure; Tuning Chart - MFJ -949E Versa Tuner II Instruction Manual

MFJ-949E Versa Tuner II

Adjustment Procedure

When using the MFJ-949E in receive only applications, adjust the MFJ-949E for the
highest "S" meter or signal level. The Tuning Chart can be used as a starting reference. To
use the MFJ-949E for transmitting, follow the steps below:
1. Select the 30W (out) METER switch scale. Place the PEAK AVG button in the AVG
(out) position. Turn the transmitter's power control fully down.
2. Position the TRANSMITTER and ANTENNA MATCHING controls and the
INDUCTOR SELECTOR switch in the bottom Tuning Chart position for the operating
frequency.
Band
160
80
40
30
20
17
15
12
10
3. Apply just enough power on CW (or AM / FM / RTTY) to obtain noticeable deflection
on the reflected power meter.
4. Carefully adjust the TRANSMITTER and ANTENNA MATCHING controls for the
lowest reflected power.
NOTE: These controls interact. Adjust the TRANSMITTER control for minimum, then
adjust the ANTENNA control for minimum SWR. Go back and forth between
these adjustments as many times as required until the lowest reflected power (best
SWR) is obtained.
5. If a perfect or very low SWR can not be obtained, STOP transmitting. Try the row of
chart settings just above the last one tried. Repeat from Step 3.
NOTE: If an SWR of 1:1 can not be obtained, move the switch towards the end of the
alphabet one position at a time. Repeat Steps 3 and 4 for each new INDUCTOR
switch position. Always use the lowest alphabetical setting possible.
CAUTION: Never transmit while changing the INDUCTOR SELECTOR.
5

Tuning Chart

Transmitter Antenna
1.5
1.5
1.5
4
5
5-1/2
6-1/2
8-1/2
9
Inductor
1.5
1.5
1.5
4 Halfway between K and L
5
5-1/2
6-1/2
8-1/2
9
F
J
K
L
L
L
L
L