Samlexpower SEC-1212 Installation & Operating Manual page 8

TROUBLESHOOTING WHEN USING THE POWER SUPPLY WITH RADIO
TRANSCEIVERS
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This power supply generates, uses and can radiate RF energy as per limits
laid down under class "B", Part 15 of FCC rules. Position the radio, antenna
and the power supply to minimize any received spurious noise from the supply
and excess RF energy from the transmitter. Ideally, for a 100W HF installation,
the antenna should be at least 40 to 50 ft. from the power supply to eliminate
the effect of transmitter energy on the power supply and the effect of the
power supply on introducing noise into the receiver.
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If the supply fails to turn on, check that the transceiver is off. The supply may
turn on with a lower load (Transceiver in receive mode) but may not turn on if
the transceiver is in transmit (High current consumption) mode.
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A slowly moving buzzing carrier heard in the receiver may be caused by the
antenna being too close to the equipment A loose coaxial connector or a bro-
ken or missing ground may aggravate this problem. Normally, these noises will
be below the background or "band" noise. RF feedback from transmitter may
create instability in the power supply causing a poor sounding, raspy or unsta-
ble transmitted signal. A distance of 40 to 50 ft between antenna and equip-
ment is generally recommended for any 100 Watt HF installation. Position the
antenna as far and as high form the equipment as possible.
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The supply may turn off due to excessive transmitter energy being coupled into
the AC and the DC lines. Either your antenna is too close (Less than 10 ft. ) or
the antenna system is not radiating properly. First check the antenna system
SWR. Then, if necessary, relocate either the antenna of the equipment further
apart.
6.