Proper Base Station & Mobile Grounding Proper grounding of your equipment is very important. Not only in performance but if you're running high power there are health risks involved with stray RF emissions. I know of cases where operators have gotten shocks while keying up and touching the mic to their lip. Proper grounding will correct this problem. In setting up a base station it's recommended that you place a 8' ground rod into the ground directly below the antenna. Run a #8 solid copper ground wire from the U-Clamp attaching the antenna to the mast. Add a second 1/4-20 nut to the clamp. The ground rod and ground wire are available at hardware or electrical supply stores. Seal all these connections. Silicone rubber will work but it deteriorates in the weather. The best product is Coax Seal. It is a pliable plastic putty that never hardens or cracks. It stays weather tight indefinitely. I strongly suggest using it on all outside connections. One roll will do several connections. At $ 2.50 a roll, that's cheap insurance. Most antenna problems are connections ... Avoid them! Next connect all the chassis together with copper braid and run another #8 wire to the same ground rod or place another ground rod near the equipment. The copper braid removed from coax will work fine. First strip the coax and slide the center conductor out. Then flatten the braid and tin about 1" at and drill an appropriate size hole at each end. Attach the braid to each piece of radio equipment using the equipment cover screws or ground connections provided by the manufacturer. The radio, amplifier, tuner, meters, TVI filter, etc., should be connected together and grounded. This will usually help in preventing RFI problems and RF feedback, which causes audio distortion and squealing in severe cases. In mobile installations it's recommended that the power supply come directly from the battery, both positive and negative. If a linear amplifier is used, it is mandatory for clean performance that both supply wires be at least #10 for up to 250 watts and are connected directly to the battery. Also inline fuses of a larger value than in the equipment should be installed at the battery. This will protect the vehicle from short circuits. I also recommend battery post extenders. They serve two purposes. First they make the accessory wires easily accessible after the installation. Second they keep your wire connections separated by brass from the post connection, extending the life of the connection. Also battery terminal protector spray further protects against corrosion. This can be purchased at any automotive store. I use NAPA Balkamp #765-1303 but any will do. All that remains is grounding the radio to a local chassis ground with a piece of braid. If linear amp is physically attached to the radio, connect the two with a short piece of braid. If the amp is under the seat or a remote location, ground it to the closest chassis ground point. These methods should improve the quality of your signal, outgoing and incoming. If you are experiencing alternator whine, a power line filter may help. All that remains is grounding the radio to a local chassis ground with a piece of braid. If linear amp is physically attached to the radio, connect the two with a short piece of braid. If the amp is under the seat or a remote location, ground it to the closest chassis ground point. These methods should improve the quality of your signal, outgoing and incoming. If you are experiencing alternator whine, a power line filter may help. All that remains is grounding the radio to a local chassis ground with a piece of braid. If linear amp is physically attached to the radio, connect the two with a short piece of braid. If the amp is under the seat or a remote location, ground it to the closest chassis ground point. These methods should improve the quality of your signal, outgoing and incoming. If you are experiencing alternator whine, a power line filter may help. © CBWI Here is a list of products that we have in stock to help with these connections: BP-EX Battery Side Post Extenders GM $3.95 ea. TP-EX Battery Top Post Extenders $3.95 ea. HD Fuse Holder WI#10 Wire & 30 Amp Fuse $1.00 ea. QD-10 Power Quick Disconnect 25OWatt $2.95 ea. #10 2 Conductor Power Wire $.75 ft. NS-22 20 Amp 14 Volt Noise Filter $9.95 ea. Coax Seal Connection Weather Proofing $2.49 ea.

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AUGUST VOLUME 1 ISSUE 1