User's Manual

M-TUNE means entry to the manual tuning mode. It allows fine tuning of PA, or in the case if

automatic tuning cannot set optimal adjustment of the PA. For proper adjustment we need to show

Screen current (at least). Prior start M-tune define one bar graph to the Screen current, or define all

bar graph as in the next picture.

Press M-TUNE. New screen is visible. Slides on the left and right side represent both variable

capacitors.

Adjustment process: Move TUNE left or right until maximum of FWD power reached. Then move

LOAD carefully so that Ig2 Screen current will be not higher than 20mA. Optimum means

maximum FWD power and Screen between 10 – 20mA for the full power output. Repeat more

times.

After adjustment press SAVE for

writing values to the memory and press

EXIT.

Repeat adjustment process for other

segments / bands.

Now one example from real situation. First we will check driving power from the transceiver. Stay in

STBY mode, press PTT and apply RF power.

Measured driving power is 16 Watts.

Now switch to OPER, press PTT and

apply RF from TCVR. See the following

picture.

Type of supported TCVR and

working

frequency are visible on the

display.

AUTO LED is ON.

Type of supported TCVR and

working

frequency are visible on the

display.

AUTO LED is ON.

PAGE 1
M-TUNE means entry to the manual tuning mode. It allows fine tuning of PA, or in the case if automatic tuning cannot set optimal adjustment of the PA. For proper adjustment we need to show Screen current (at least). Prior start M-tune define one bar graph to the Screen current, or define all bar graph as in the next picture. Press M-TUNE. New screen is visible. Slides on the left and right side represent both variable capacitors.
PAGE 2
Output power is 577W, TCVR reflected Type of supported andpower reached abt. 40W and screen current working is abt. -20mA. Real antenna had frequency are visible the 50 different impedance thanon real display. Ohms. We done M-TUNE to optimize PA adjustment (press MENU, M-TUNE). AUTO LED is ON. This Type is of the result TCVR after and manual supported adjustment process. Output workingpower increased to 1 kW (driving still 16W), on the Screenfrequency current is are nowvisible abt. -19mA. display.
PAGE 3
After described procedure the amplifier is tuned correctly and ready to give 1500 W PEP output power in all operation modes. At optimal tuning and full output power a positive max. 20mA current goes through the second grid.