AMX TXC16 Plus Specifications download pdf (Page 95)

SG-2000 MANUAL 88

The SGC Building, 13737 S.E. 26th St. Bellevue, WA. 98005 USA

4. The doors, hood, and truck lid should all be grounded to the vehicle using

size #0 (AWG) braid or larger. It is important that all parts of the vehicle

be bonded together in this fashion.

5. Take care to ground the vehicle exhaust pipe in several places. If the

exhaust pipe is only partially grounded and vibration is encountered, the

vibrating tail pipe can cause irritating noise.

6. For vehicles which are operating in areas of dry, blowing sand, there is

occasionally static build-up on the vehicle relative to ground. You may

also encounter this phenomenon in a vehicle operated in cold dry climates

in the winter months. You may use either a static spray (such as is sold in

department stores for use on clothing) or other commercially made

products to reduce static.

Tires rolling on pavement may product static electricity under certain

conditions. Although not usually encountered on vehicles using semi-

metallic brake pads and disk brakes, it has been known to happen on

older style large military vehicles where the axle shaft is insulated from

the wheel. Commercial brush kits are available to resolve this condition

should it be encountered.

7. Don’t assume that your vehicle bumpers are made of metal. Automobile

bumpers are being made out of plastics and plastic-filled metal shells

which attach to the vehicle using electrically unreliable fasteners. In many

cases a metal bumper looks like it should be grounded, but in fact it is not.

There is a simple reason why this happens: some vehicles have the

bumpers put on at the assembly plant after a coat of paint or protective

finish has been sprayed on the body. This good engineering plan for rust

prevention is not acceptable for HF radio work because the paint layer

may not be scraped by tightening the bolt and this may result in a poor

connection or no connection at all.

8. If you are installing the SG-2000 in a remote head configuration, it is not

necessary to ground the control head with a separate cable. The control

head and the RS-422 data lines which are used for control of the radio

need only be grounded at the control head plug on the radio in order to

work properly. Installation of the control head with grounding should

not cause problems, but if any unusual operations are encountered, the

existence of a ground loop involving the control head should be

investigated.

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AMX TXC16 Plus Specifications Page 95