Exciters; Antennas; Grounding - JRC JRL-2000F Manual

BEFORE USING THE JRL-2000F
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3.3 Exciters
Any HF-band transmitter or transceiver with a 50Q RF output impedance can be used as
an exciter for the JRL-2000F. When used with the Japan Radio Co. JST-135 HF transceiver,
additional control features can be utilized to enhance automatic band changing and tuning.
lf the maximum output of the exciter exceeds 100W, the over-current protection circuit in the
power supply unit may be activated and the output waveform may be distorted. Therefore,
it is necessary to connect an external ALC signal in order to control the exciter output.
3.4 Antennas
lt is recommended that you select antenna(s) that meet the following criteria:
• Antenna impedance is 50n.
• When using a beam or vertical antenna equipped with trap coils or balun transformers,
be sure that they are capable of handling at least 1.5 kW PEP input.
• Use a coaxial cable with sufficient current capacity for all antenna Connections.
• lf the antenna VSWR value is too high the antenna wave radiation factor drops. Also, in
case of a mismatch of the coaxial cable and antenna, undesired RF radiation may occur,
possibly causing radio interference. Therefore, special care must be taken in order to avoid
these problems.
3.5 Grounding
To prevent electric shock and interference with other devices, connect your JRL-2000F and
all other radio devices to a proper external grounding system. Use the heaviest possible copper
wire, braid or strap and follow the shortest possible route. Do not use any gas pipe, water
pipe or cable duct as a ground.
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