4.2. Changing OPERATE and STANDBY Modes
The OPER button changes between two modes. When the green light above the button is illuminated, the
amplifier will remain ready to operate, even automatically returning from STANDBY after a high-drive
protection trip. That is, after a protection trip, e.g., from an overdrive event, the amplifier will normally
shift to the STBY mode for several seconds, but it will automatically return to the OPER mode after that.
This is the AUTO-OPERATE feature. Alternatively, the OPER button may be depressed manually to go to and
remain in the STBY mode, such as when you leave the station for a while. The green LED goes off and the
AUTIO-OPERATE function is suppressed temporarily. Pressing the OPER button again restores the
AUTO-OPERATE feature.
4.3. RTTY Mode
Select the RTTY mode to operate continuous-duty modes such as RTTY, SSTV or other data modes. The LED
indicator above the RTTY button illuminates and the amplifier operating parameters are changed to reduce
tube dissipation. In the RTTY mode, the amplifier output power is reduced to a maximum of 500 W. There is
no need to re-adjust tuning when changing between RTTY and normal modes.
NOTICE
In order to avoid any damage (not covered by the warranty), do not change modes
during transmission. That is, do not change to or from RTTY or any other mode when
transmitting.
4.4. Antenna Change
By pressing the A1-A2 button, the amplifier output is switched between the two corresponding antenna
outputs, ANT1 and ANT2. The lights above the button indicate the current antenna selection.
NOTICE
In order to avoid any damage (not covered by the warranty) do not change the antenna
during transmission.
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