Reminder: a trans-match (commonly misnamed an “Antenna Tuner”) can NOT improve the efficiency of a bad antenna. It just matches the impedance to the 50 ohms expected by your transmitter so the transmitter doesn’t know how bad it is and doesn’t overheat. (That reflected power is still turned into heat at the antenna & tuner, just not in your expensive transmitter…) So try and tune your Antenna first, and only use a transmatch as necessary.

Button settings on an MFJ-941D front:

Reading Power (forward or reflected watts):
1. Power/SWR button pushed in to Power.
2. Select 1-30 or 1-300 watts
3. Select FWD or REF power

Transmit full carrier (CW) and read the power.

Tuning the built in SWR mode:
1. Power/SWR button OUT to the SWR setting.
2. Setting for 30/300 doesn’t matter, it’s a ratio….
3. Push FWD/REF in to tune the SWR meter.
4. Key up the transmitter (low power setting is fine) and use the SWR Sensitivity knob the move the meter to the max (infinity, far right) side of the scale.

Reading SWR (After tuning the meter using steps above).
1. Power/ SWER button OUT to SWR.
2. ignore 30/300 button, it doesn’t matter.
3. FWD/REF button OUT.
3. Key transmitter full carrier (CW), read SWR on the meter.