Radioddity PAX100 User Manual
Warning
1. The PAX100, like all 100-watt solid-state amplifiers, will require a power supply capable
of delivering 20Amps current at 13.8 Volts. If your power supply does not have, at a
minimum, 15Amps current capability, do not use the amplifier until you have a suitable
power source.
2, Before using the PAX100 with your G90 make sure the built-in antenna tuner has been
turned off to avoid damaging the PAX100.
3. The PAX100, like all solid-state amplifiers, requires a resonant antenna on every
frequency you operate on. If the antenna is not resonant, you will need an external
Antenna Tuner. The tuner must be able to deliver SWR to the output of the amplifier of
less than 2.0:1. The lower the SWR, the less chance there is of damaging the amplifier. It
is best to keep the SWR below 1.5:1 to avoid potential damage to the PAX100. It is
recommended not to exceed 2.0:1. When the amplifier is in use the radios internal
antenna tuner will NOT be usable. If the antenna’s SWR is much higher than 1.5:1 the
output performance can suffer. As it approaches the maximum allowable SWR of 2.5:1,
the amplifier can be damaged. NEVER use the PAX100 with an SWR of 2.5:1 or higher,
as the amplifier will be damaged and unusable until repaired.
4. The input power (from the G90) to the amplifier should never exceed 10 Watts; even on
SSB peaks. Driving the amplifier with an output from the G90 higher 10 watts will result in
damage to the PAX100 amplifier.
5. Output with an open circuit or short circuit is prohibited.
What You Need
To run an external power amplifier, you should have the following items at least:
1. A power supply capable of delivering, at a minimum, 20 Amps; preferably with voltage
and amperage meters built in to monitor amplifier current draw and voltage under load.
2. An external antenna tuner capable of handling, at least, 100 Watts.
3. Crimpers and crimp connectors are necessary for terminals that connect to the power
supply. The crimper and connector must be able to handle 20Amps.
4. An accurate power meter that can read up to 150 watts. It has to be usable from 1.8 to
