Technical information
Table Of Contents
- GoMobile Cover
- SGC – The SSB People
- Go Mobile at 500 Watts
- T a b l e o f C o n t e n t s
- I n t r o d u c t i o n
- C h a p t e r 1 C h a n g e s i n M o b i l e R a d i o
- C h a p t e r 2 O r i e n t i n g Y o u r s e l f t o 5 0 0 W a t t s
- C h a p t e r 3 DCP o w e r S u p p l y S y s t e m f o r a M o b i l e I n s t a l l a t i o n
- C h a p t e r 4 A n t e n n a s a n d G r o u n d s
- C h a p t e r 5 N o i s e S u p p r e s s i o n a n d S h o c k -M o u n t i n g
- C h a p t e r 6 I n s t a l l a t i o n P r o c e d u r e s
- C h a p t e r 7 I n s t a l l a t i o n V a r i a b l e s
- C h a p t e r 8 G o i n g M o b i l e a t 1 5 0 W a t t s
- Appendix A — QMS S y s t e m
- A p p e n d i x B — S e l e c t i o n o f E q u i p m e n t
- A p p e n d i x C — T e s t D a t a
- It all Adds Up
SGC 500-watt installation. SGC does not recommend a
shock mount in the 500-watt mobile installation. But if you
frequently drive back country roads with 5-inch-deep pot
holes which cause a vibration factor over 3, a shock mount is
required.
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© 1997 SGC Inc.
SGC Inc. SGC Building, 13737 S.E. 26th St. Bellevue, WA. 98005 USA
P.O.Box 3526, 98009 Fax: 425-746-6384 or 746-7173 Tel: 425- 746-6310 or 1-800-259 7331
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Example Calculations of Vibration Factor
1. Sailboat. For a sailboat in a 10-foot sea, with a
wave period of one minute, the calculation is:
120” times 1/60th of a cycle per second =
a vibration factor of 2.
So in this case, installation of a shock mount is not nec-
essary.
2. Four-wheel drive vehicle.For a military four
wheel drive vehicle racing across the back country at
60 miles per hour, the displacement can be three inch-
es and the frequency up to 2 times per second; in this
case, the calculation would be:
3 inches times 2 = a vibration factor of 6.
A shock mount is obviously needed.
3. Family vehicle.A family vehicle driven on aver-
age city streets and highways. would suffer a dis-
placement of 1/2-inch or less. The calculation is:
.5 inch times 2 = a vibration factor of 1.
So in this case, installation of a shock mount is not nec-
essary.