10
CAUTION
If you are using an older transceiver or transmitters without time delay, we recommend to connect
the PA in such a way that the transmit/receive switch (foot switch for example) is connected with
the KEY IN socket of the amplifier. The KEY OUT socket is to be connected with the PTT socket at the
transceiver.
The amplifier is equipped with safety devices, which ensure that the output relay is not switched under
power mistakenly (hot switching).
KEY IN
RCA Phono
-
Input signal PTT switching voltage / current - 5V /2mA)
KEY OUT
RCA Phono - Output signal PTT (maximum switching of 30V / 50mA)
4.4.
Main Supply
CAUTION
Be sure you got PA with properly terminated line cable, corresponding with your power system’s
outlet. If not, contact your dealer. In such a case you should make the necessary changes using a
licensed electrician.
WARNING!
Be sure that your power system is correctly wired and properly rated! To use adequately sized and
connected grounding system is also very important.
4.5.
Cooling
CAUTION
The amplifier must be installed in such a way that free flow of hot air from the tube is allowed. Do
not obstruct air intake and exhaust areas of the PA.
The centrifugal blower provides basic cooling of the amplifier. Blower is activated by switching the PA
on and it is turned off when cooling is finished (approx. 1-5 min after switching off the PA depending
on the temperature of the tube). Blower speed (2 steps) is setting automatically according to the tube
temperature. For long time operation (contests) the PA is equipped with an auxiliary fan, which can
operate in three modes (go to Settings menu for more details).
Detailed view on the tube and blower area.
Antenna switch (above) is installed inside the
metal box.
Type of supported TCVR and working
frequency are visible on the display.
AUTO LED is ON.
Содержание OM2000+
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