OPERATION
a) Turn ON the amplifier operating on the switch placed on the back of the amplifier; the green LED labeled
“POWER ON” placed on the frontal indicating the “stand-by” position of the amplifier will light.
b) Rotate the frontal switch labeled “FILTER BAND” so that the work band of the filter coincides with the band
in which you intend to operate; each band is marked with the lighting of the respective green LED placed on
the frontal.
c) Rotate the frontal switch labeled “STBY-RTTY-SSB” from the “stand-by” position of the amplifier to the
working position marked by the lighting of the green LED labeled “OPERATE” placed on the frontal.
NOTE: The frontal switch labeled “STBY-RTTY-SSB” is a three position switch:
The first position is a “stand-by” position;
The second position is recommended when the amplifier work in “RTTY” mode;
The third position is recommended when the amplifier work in “SSB-CW” mode.
d) At this point, the amplifier is ready for the use and, every time that you will go in transmission with the HF
apparatus, the green LED labeled “ON AIR” placed on the frontal will light.
To turn OFF the amplifier is sufficient to operate again on the switch placed on the back of the amplifier.
ON THE DRIVE POWER
Premise that is possible to operate with minimum drive power levels, it is recommended to adjust the drive
power in such a way as not to exceed the output power level, by emission mode, as indicated on page nr. 4 of
this manual.
ON THE FILTER BAND SWITCH “FILTER BAND”
In the case in which you select a wrong band, two situations can happen:
1) if the selected filter cut-off frequency (or correspondent band) is lower than the one of the transceiver, the
protection will immediately intervene;
2) if the selected filter cut-off frequency (or correspondent band) is higher than the one of the transceiver, the
protection will not intervene and there will not be any damage to the amplifier, but you will have an
emission full of unwanted harmonics contents.
NOTE: WHEN YOU ARE IN TRANSMISSION, DO NOT ABSOLUTELY OPERATE ON THE SWITCH.
ABOUT THE “AUX” POSITION OF THE FILTER BAND SWITCH
This function is not active.
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