MFJ-948 Versa Tuner II
5
Adjustment Procedure
When using the MFJ-948 in receive only applications, adjust the MFJ-948 for the highest
"S" meter or signal level. The Tuning Chart can be used as a starting reference. To use the
MFJ-948 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.
Tuning Chart
Freq. MHz
Transmitter
Inductor
Antenna
1.8 4-1/2 A
4-1/2
1.8 1 B
1
2.0 5-1/2 A
5-1/2
2.0 3 B
3
3.5 9 B
9
3.5 6 C
6
3.5 4 D
4
3.75 7 C
7
3.75 5 D
5
3.75 3 E
3
4.0 7 C
7
4.0 6 D
6
4.0 4 E
4
7.15 8 F 8
7.15 6 G
6
10.1 9 G
9
10.1 8 H
8
14.2 9-1/2 H
9-1/2
18.1 9-1/2 I 9-1/2
18.1 8-1/2 J 8-1/2
21.2 9-1/2 J 9-1/2
21.2 7 K
7
24.9 9 K
9
28.5 9-1/2 K
9-1/2
3. Apply just enough power on CW (or AM / FM / RTTY) to obtain noticeable deflection
on the reflected power meter.
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