From inside (document excerpt):
ALINCO COMMERCIAL COMMUNICATION HF TRANSCEIVER DX-801 Instruction Manual Thank you for purchasing this ALINCO transceiver. To obtain optimum performance from this transceiver, read this instruction manual thoroughly, and keep it for future reference. PRECAUTIONS · Do not open the transceiver case or touch no-user-serviseable components. · Do not yank the power cable from its outlets. Also, do not rewire the power cable with other extension cabJes.
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Such handling may damage or short-circuit the cable. · Do not expose the transceiver to direct sunlight or to source of heat. Also, avoid using the transceiver in an extremely dusty or humid environment. · Use a 13.8 V DC regulated power supply to operate this transcei ver. The transceiver must be grounded. · Do not place anything which might spill over on top of the transceiver. · Beware of moisture condensation. Moisture in the air will condense on the transceiver when you move it from a cold place to a warm place. Condensation will cause the unit to malfunction. If condensation fOTITIS on the unit, wipe or let dry. · For good ventilation, allow about 10 em between the rear of the transceiver and the wall. J · If the transceiver ever emits smoke or strange smells, immediately tum sit off and unplug it. Then, ontact your nearest ALINCO dealer.