SGC – The SSB People SGC develops, manufactures, and sells high performance single sideband (SSB) communications equipment. For more than 25 years, the company has sold to the marine, military, aviation, and industrial markets world wide. Over these years, SGC has earned an outstanding reputation for product reliability and for service after sale. On the cutting edge of technology, the company keeps pace with equipment options, engineering developments, and design requirements.
Go Mobile at 500 Watts Facts and Equipment Another Informative Publication of SGC, Inc.
Introduction Chapter 1 Changes in Mobile Radio 1 2 Chapter 2 Orienting Yourself to 500 Watts Engine Compartment 5 Driver's Compartment 5 Exterior 6 Rear Compartment 10 4 Chapter 3 DC P o w e r S u p p l y S y s t e m for a Mobile Installation 11 Measuring your Vehicle's Requirements 11 T esting your E lectr ic a l Syste m 12 Isolating the Auxiliary Battery 13 Evaluating Batteries 15 Chapter 4 Antennas and Grounds Antenna for HF Mobile Installations Mobile Grounds Chapter 6 Installation Procedures Engin
5 58 60 62 65 68 69 Appendix A — QMS System A-1 Appendix B — Selection of Equipment B-1 Appendix C — Test Data C-1 g??@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@?? g g ?@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
Going Mobile in HF is both art and a science. Like any other a r t o r s c i e n c e , t h e a c h i e v e m e n t c o m e s a f t e r y e a r s o f v o c at i o n , e x p e r i e n c e , k n o w l e d g e , r e s e a r c h , d i s c i p l i n e , a n d p a ssion. A t S G C , w e h a v e d e d i c a t e d m o r e t h a n 2 5 y e a r s w i t h p a ss i o n — a n d a t t i m e s w i t h f r u s t r a t i o n — t o f i n d a w a y f o r e v e r yone to succeed in “going mobile.
Chapter 1 In the early days of radio, mobile radio also had its humble b e g i n n i n g s . T h e f i r s t m o b i l e r a d i o s y s t e m s , a b o a r d p a s s e nger-carrying ships, used low and medium frequencies, and the mode was CW (“continuous wave” using Morse code). Special shore stations installed to handle ship traffic quickly became an important safety feature, the obvious benefit being the safety of passengers.
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 E-mail: SGCMKTG@aol.com Website: http://www.sgcworld.
Chapter 2 After purchasing your SGC 500-watt mobile system, you will undoubtedly be anxious to install it as quickly as possible and begin operation. However, we recommend that you first spend some time in reviewing the design and layout of your vehicle, then in planning a logical installation scheme. The planning time you spend beforehand could save you hours of reinstallation time later.
O p e n t h e h o o d a n d t a k e a c l o s e l o o k a t t h e e n g i n e a n d e l e ctrical system layout. (We discuss noise suppression from such elements as spark plugs and the ignition coil in Chapter 5.) F i r e w a l l o p e n i n g s . Look at the several penetrations of the firewall where wires and hoses pass through. These locations will become important later as you route the cable from the auxiliary battery to the main battery terminals. SGC Inc. SGC Building, 13737 S.E. 26th St.
R e m o v i n g a p a n e l : If you are unsure how to remove a D r i v i n g s a f e t y . Keep driving safety in mind: ensure that the transceiver, control head, amplifier, and antenna coupler do not block your field of vision (front, side, or rear), do not block your ability to see through side-view and rear-view mirrors, and do not interfere with the operation of gearshift or pedals.
• Easy transportability from one vehicle to the next. The Q M S m o u n t i n g s y s t e m c a n b e c o n s i d e r e d “ s e m i - p e r m anent” because its suction cups and strapping allow removing the entire unit from one vehicle for immediate installation on another. The QMS goes in place, and stays in place, until you need to move it. For this installation, find body panel edges or “lips” on which the steel hooks will catch and anchor.
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P r e - e x i s t i n g h o l e s : Notice some pre-existing holes may be present in the vehicle body. They are used for ventilation or for wiring lead-throughs from options that may or may not be available on your vehicle. Try to utilize these first, instead of drilling any holes in your car. I n c o n s p i c u o u s h o l e s : Another idea is to locate a door “knife-edge” or lip and file a “slot” just wide enough for a cable to pass through.
Rear Compartment C o n s t r u c t i n g a p l y w o o d p l a t f o r m ( s e e d i s c u s s i o n o f r e a r c o mpartment in Chapter 6) which could mount on spacers or rubber feet can hold equipment securely and still give spare tire access.
DC Power Supply System for a Mobile Installation B e c a u s e y o u r v e h i c l e ‘ s e l e c t r i c a l s y s t e m h a s a l i m i t e d c a p a c ity, it is important to understand the power requirements of y o u r m o b i l e r a d i o i n s t a l l a t i o n . I n a d e q u a t e p o w e r t o t h e s y stem can render the best radio equipment useless. Let’s first take a look at the battery and charging system on a later model vehicle.
Current requirements. Our 500-watt system has these current requirements: SG-2000 Transceiver 16 A (transmit) 0.8A (receive) 500 W Power Cube 40 A average (SSB) 90 A peak SG-235 Coupler 0.
operate at a higher voltage but should not exceed 14.6 V. I f y o u r s y s t e m f a l l s w i t h i n t h i s r a n g e , i t i s p r o b a b l y f u n c t i o ning well. If not, it will need further diagnosis and repair. Note that one of the most common reasons for a low output from t h e c h a r g i n g s y s t e m i s a w o r n o r i m p r o p e r l y t e n s i o n e d a l t e rnator drive belt. The solenoid requires connections only to the main battery, auxiliary battery, starter switch, and ground.
well on any conventional 12V automotive system. “ S m a r t ” s o l e n o i d f e a t u r e s . The “smart” solenoid offers fully automatic switching of the auxiliary battery system. It also protects the charging system from damage resulting from excessive current due to high discharge rate.
t h e m a i n b a t t e r y v o l t a g e i s m o r e t h a n 1 V b e l o w t h e a u x i liary battery voltage and the starter switch is closed. This is the “jump start” mode. (An optional remote light could be installed to monitor this condition.) S y s t e m p r o t e c t i o n : T h e S m a r t S o l e n o i d p r o t e c t s t h e c h a r g- ing system by opening the circuit between the main and auxiliary batteries if the charging system voltage drops below 12.8V even when the engine is running.
D e e p c y c l e b a t t e r y . We recommend that you use either a deep cycle marine/RV battery or a Gel Cell designed for this p u r p o s e . G e l C e l l s a r e s i m i l a r t o c o n v e n t i o n a l l e a d a c i d b a tteries, except that the electrolyte is in a jelled state. Whereas liquid electrolyte batteries must remain upright, some gel cells may be mounted in any position.
Antennas and Grounds Antennas for HF Mobile Installations A n a n t e n n a d o e s n o t h a v e t o b e a p h y s i c a l q u a r t e r w a v elength in order to work efficiently: shortened antennas can be used. But when an antenna is less than a physical quarter wavelength, it has less efficiency than a larger antenna. Use of a high performance antenna coupler, such as the SG-235, will improve antenna performance dramatically. M u l t i p l e f r e q u e n c y a n t e n n a s.
provides a reasonable load to a good antenna coupler at all frequencies from about 1.8 to 30 MHz. The use of an antenna coupler is required on all but the most carefully matched center- and top-loaded mobile whip antennas which present close to a 50 ohm match to the antenna lead.
• Most antennas are so heavy that they are mounted on the bumper of a vehicle. Because of this location, about a third of the antenna is less than a foot from the grounded body sheet metal. This is equivalent to a c a p a c i t o r o f 2 5 t o 1 0 0 p i c o F a r a d s s h o r t i n g y o u r a n t e nna. QMS, mounted high on the side of the vehicle, gains 3 to 6 dB. • Body sheet metal prevents the antenna from radiating evenly.
• Some hams use the “antenna tuner” built into some radios, feeding their antennas directly with coax. But in a nonr e s o n a n t a n t e n n a , a v e r y h i g h S W R e x i s t s o n t h e f e e dline between the radio and antenna even if you get a l o w S W R r e a d i n g w i t h a b u i l t i n t u n e r . W h e n y o u r f e e dline SWR is above 4 to 1, you have effectively put 29 pico Farads per foot capacitance to ground.
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H i n g e d o p e n i n g s . The doors, hood, and trunk 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. E x h a u s t p i p e . Take care to ground the vehicle exhaust pipe in several places. If the exhaust pipe is only partially grounded and the car encounters vibration, the vibrating tail pipe can cause irritating electrical noise.
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 E-mail: SGCMKTG@aol.com Website: http://www.sgcworld.
Chapter 5 Noise Sources Three kinds of vehicle noise may be encountered: g r o u n d / s t a t i c n o i s e ( e l i m i n a t e d b y f o l l o w i n g p r o p e r g r o u n ding procedures in Chapter 4); engine noise; and accessory noise.
Invest in a small inexpensive AM radio. Tune it to the high end of the broadcast band (1610 KHz) and turn up the volume.As you get the radio near the ignition wiring, you will notice a marked i n c r e a s e i n s p a r k p l u g n o i s e . I s o l a t i n g t h e p r o blem is the first step toward resolving a noisy engine. coil to the center conductor of the distributor. With too much capacitance, the spark voltage may drop from 20,000 volts to 5,000 volts, not enough to cause a spark in the engine.
S h i e l d i n g: S h i e l d i n g t h e i g n i t i o n s y s t e m i s t h e n e x t m o s t C o m p o n e n t n o i s e . Noise originating in other components must be dealt with in other ways. G r o u n d i n g b r u s h e s : Wheel static may be eliminated with brushes. (See “Tires” in Chapter 4.
Example Calculations of Vibration Factor 1 . S a i l b o a t . 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. S o i n t h i s c a s e , i n s t a l l a t i o n o f a s h o c k m o u n t i s n o t n e cessary. 2 . F o u r - w h e e l d r i v e v e h i c l e .
Chapter 6 The installation of the SGC 500-watt mobile system involves four separate areas: Engine Compartment: • Routing the DC cable from the engine compartment to the equipment. • Installing the “Smart Solenoid” • Connecting the DC power cable and starter switch.
P a s s i n g c a b l e t h r o u g h f i r e w a l l . Locate the point in the f i r e w a l l ( t h e w a l l s e p a r a t i n g t h e e n g i n e a n d p a s s e n g e r c o mp a r t m e n t ) w h e r e e l e c t r i c a l c a b l e s f e e d t h r o u g h . T h i s i s u s ually somewhere near the steering shaft entrance and will u s u a l l y h a v e a c a b l e b u n d l e w i t h a r u b b e r g r o m m e t e n c i rcling it to keep water and wind out.
I n s u l a t i n g t o o l s : Whether you choose to use a socket driver, c r e s c e n t o r o p e n - e n d e d w r e n c h t o r e m o v e t h e b a t t e r y t e r m inals, remember that these are conductive, and may short the battery should they contact the chassis (when loosening the positive terminal), or the positive terminal (when loosening the ground terminal). We recommend temporarily insulating the tool handle by covering it with heat-shrink tubing or electrical tape.
The end of the wire should exit just about even with the end of the crimp on the terminal. Place the tip of the iron on the area heating both the terminal and the wire, then slowly start to apply solder. As the solder melts, capillary action will draw or “wick” it up into the wire strands. Keep a steady supply until the wicking action stops and the solder starts to pool on top.
With the moldings removed, you should be able to unclip the edges of the carpeting to expose a small length of the vehicle floor. R u n n i n g t h e c a b l e. R o u t e t h e c a b l e b e n e a t h t h e c a r p e t i n g , along the right side of the vehicle floor, all the way to the rear deck or trunk compartment.
• Some bolts use hexagonal cap heads that require the use of a large Allen wrench (usually with a breaker bar for added leverage) or driver for loosening. • If removal becomes absolutely necessary, when reinstalling the bolt: Apply fresh thread-locking compound, and tighten the bolt back in place using the torque specified by the automobile manufacturer. Replace and torque all bolts after removal. You will want the control head to fit snugly in a location that offers: SGC Inc. SGC Building, 13737 S.E.
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To mount the remote kit, first prepare the windshield surface by wiping it off with glass cleaner. Next loosely assemble the control head to the adjustable mounting arm and lift and position the entire assembly against the windshield. Shift the mount around to determine how high on the windshield the mount should be placed to allow ample room to position the control head for the desired angle.
affixed), so adjust the arm position to compensate for this droop.
I n s t a l l i n g t h e S m a r t l o c k P r o . The Smartlock Pro, a small r e m o t e c o n t r o l b o x , a l l o w s t u r n i n g o n / o f f t h e r e c e i v e r p r eamp in the SGC antenna couplers and locking or resetting coupler operation. It can be mounted in a convenient location on or below the d a s h .
cle with sufficient length to easily reach the Powercube amplifier. remote control box, excess lead length will be trimmed at the b o x , r a t h e r t h a n a t t h e a m p l i f i e r. T h i s i s b e c a u s e t h e s m a l l 4 pin plug used for on/off and LED power is pre-assembled at the factory and should not be cut off and re-wired.
P r e p a r i n g t o M o u n t t h e Q M S . The suction cups form one half of the QMS anchoring systems, the nylon straps finish the job. Included with your QMS systems are four plasticcoated steel hooks. The nylon straps loop through these, and the hooks hook onto ledges to form a secure anchor point from which the strap tension is tightened.
Locating Body Openings for Cable Lead-Through. A multi-conductor cable together with RF coax lead (within one sheath), and a braided strap for RF grounding—within one sheath—must feed from the SG-235 coupler (inside the QMS system) through the vehicle body to connect to the SG-500 PowerCube, SG-2000 Transceiver, and the vehicle ground ( c h assis).
To provide an effective RF/DC ground on your vehicle: • m a k e a s o l i d e l e c t r i c a l a n d m e c h a n i c a l c o n n e ction to the vehicle body • e n s u r e t h e b o d y i s g r o u n d e d t o t h e v e h i c l e c h a ssis (in newer cars with unibody construction, this is done for you).
In vehicles with steel frame construction, you will also want to run a ground strap from the body to the frame. If you choose to connect the grounding strap to the vehicle trunk or hatch lid, remember that these may ride on nylon bushings w h i c h w i l l i n s u l a t e t h e l i d f r o m t h e b o d y . T h e r e f o r e a n a d d it i o n a l g r o u n d s t r a p f r o m t h e h a t c h t o t h e b o d y m a y b e n e e ded.
3. Align the four holes in coupler mounting bracket with the four holes in the QMS bottom. Now install the four suction cup feet to the QMS box—the mounting screws inset in their feet fit through both the box and coupler bracket holes. Fasten each foot with an appropriate bolt. 4.
• H i g h a d h e s i o n s t r e n g t h r e s u l t s f r o m t h e l a r g e s u rface area and high vacuum obtained from the quality suction cups. (Climbers scale buildings and w o r k e r s c a r r y p l a t e g l a s s u s i n g s i m i l a r h i g h - q u a lity, commercial suction devices.
Mounting the tion cups (how seal (how well determine their of about S u c t i o n C u p s. T h e c o m p r e s s i o n o f t h e s u cstrong is the vacuum) and the quality of the they match the contour of the vehicle) will performance. To attach the suction cups to glass, prepare the surface by first wiping it with glass cleaner and a soft rag.
A properly installed box will be self-supporting (without the t i e - d o w n s t r a p s ) a n d c a n n o t b e r e m o v e d b y m o d e r a t e t u gging and pulling.
The key to this part of the installation is finding a body panel edge or “lip” that the steel hook will catch and anchor onto well. With a little bit of exploration and ingenuity on your part, you should be able to find the edges needed to secure the hooks and mounting straps. dow, where the glass meets the window sealing strip. In this SGC Inc. SGC Building, 13737 S.E. 26th St. Bellevue, WA. 98005 USA P.O.
“natural resting position,” the QMS can be secured firmly, and will slide no further.
If the QMS is mounted on a horizontal surface, such as a roof or trunk top, start tightening the straps in any order. Pull t h e s t r a p s a s t i g h t a s p o s s i b l e , s o t h a t a s l i t t l e “ p l a y ” a s p o ssible when the straps are pushed in from their center. The idea here is that it is sometimes easy to get carried away with over tightening t h e s t r a p s .
Mounting the SG-303 antenna. The antenna which s c r e w s i n t o t h e Q M S r a t c h e t m o u n t i s n o t a t e m p o r a r y i n s t a llation. A s s e m b l i n g t h e a n t e n n a: T o a s s e m b l e t h e S G - 3 0 3 a n t e n n a , use wrenches to tighten the two sections together.
Using body openings for coupler cable and braided g r o u n d s t r a p l e a d - t h r o u g h. T h e Q M S s y s t e m h a s s e v e r a l leads from the SG-235 coupler that must feed through the vehicle body to connect to the SG-500 PowerCube, SG-2000 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 E-mail: SGCMKTG@aol.com Website: http://www.sgcworld.
As we advised in Chapter 1, you have identified some preexisting holes in the vehicle body, holes used for ventilation or for wiring lead-through from options that may or may not b e i n s t a l l e d o n y o u r v e h i c l e . T r y t o u t i l i z e t h e s e f i r s t , p r e f e rable to drilling holes in your car. Another idea is to locate a door “knife-edge” or lip and file a “slot” just wide enough for a cable to enter.
Upholster the platform to match the interior of the car. We u s e d a h e a v y - d u t y s t a p l e g u n a n d a h o t - g l u e g u n f o r a t t a c hing the upholstery. Check in automotive stores for a roll of carpet you prefer. 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 E-mail: SGCMKTG@aol.com Website: http://www.sgcworld.
Straps that provide anchoring in both horizontal directions (side-to-side, front-to-back) work best, but be sure the s t r a p s d o n o t b l o c k c a b l e a n d p l u g c o n n e c t i o n s . A f t e r t i g h tening the straps, you can trim off excess length, or else fold up the excess and use nylon wire ties for neatness.
Installation Variables In preparing for this book, SGC installed the SGC 500-watt system in four vehicles: GEO Metro, GEO Tracker, Jeep Cherokee, and Cadillac. W e s o u g h t t o d o c u m e n t i n s t a l l a t i o n p r o c e d u r e s a n d d i f f i c u lt i e s e n c o u n t e r e d d u r i n g e a c h s e p a r a t e i n s t a l l a t i o n .
W e s e a l e d u p t h e o p e n i n g i n t h e r u b b e r f e e d - t h r o u g h g r o mmet with some silicone rubber. Driver’s compartment. We divided the cables between the left and right sides: DC cable to the right, control and Smartlock lines to the left. We routed both underneath the r e m o v a b l e p l a s t i c m o l d i n g s a l o n g t h e d o o r f r a m e s .
R e a r c o m p a r t m e n t . With the SG-500, Slimpak, and battery already strapped down, we lifted our mounting board into the compartment. We routed the auxiliary battery cables and the control cables to their respective terminals/connectors, a n d t r i m m e d o f f a n y e x c e s s s o t h e y j u s t r e a c h e d t h e i r d e s t inations. W h e n a l l o f t h e e q u i p m e n t w a s s e c u r e l y i n p l a c e , w e c o nnected the control cables and coaxial cables.
connect the auxiliary battery cable to the battery. (See data sheet, Appendix C.
T o f a c i l i t a t e t h e s o l e n o i d c o nnection to the starting switch, we found the wire from switch to starter and in a convenient place spliced in the solenoid lead. The QMS box was grounded to the trunk lid using the two bolts which secure the underside of the lid to its hinging arm. (Loosen one bolt at a time to prevent springing the lid out of alignment.) SGC Inc. SGC Building, 13737 S.E. 26th St. Bellevue, WA. 98005 USA P.O.
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D r i v e r ’ s c o m p a r t m e n t . Plastic moldings were affixed in place with plugs, and were removed by popping them out. E x t e r i o r . T h e Q M S b o x w a s m o u n t e d o n t h e r e a r l e f t w i ndow, with mounting straps running vertically from the wheel well to the top deck. The control cable and braided ground strap were fed through a narrow slit where the metal body and molded quarter panel are joined.
A tie point for the braided ground strap leading from the QMS box was located on the interior of the rear wheel well. R e a r c o m p a r t m e n t . Battery, slimpak and SG-500 tuck neatly into the rear compartment of the Jeep Cherokee.
Exterior. Because our Tracker version had a soft top, we mounted the QMS box on the vehicle body, above the rear left wheel. However, if your Tracker has the hard shell top, the box could be mounted on its rear left side. Tie points for the braided ground strap were found along the inside of the fender skirt and below the rear deck carpeting. metal can be drilled and self-tapping or machine bolts can be SGC Inc. SGC Building, 13737 S.E. 26th St. Bellevue, WA. 98005 USA P.O.
Concealment: Cover the gear from sight with cloth pullovers. A vinyl wheel cover fits over the gear nicely and can usually be had in a color that matches your interior. C o v e r i n g t h e P o w e r t a l k c o n t r o l h e a d , t r a n s c e i v e r , a n d a m p l ifier with even a small towel not only serves to conceal their identity but also shields them from the heat of long, direct exposure to sunlight.
Non-SGC Transceivers S G C w a n t s i t s e q u i p m e n t t o b e u n i v e r s a l . T o s h o w t h a t v a r ious other HF transceivers work in our demonstration cars, we installed and tested four foreign-manufactured amateur radio transceivers for operation and compatibility with the 500-watt mobile installation. 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 E-mail: SGCMKTG@aol.
Y a e s u s w i t c h : The Yaesu FT-900 requires that a small switch Check in the documentation supplied with each rig for the p r o p e r t e r m i n a l s , c o n n e c t i o n s o r s e t t i n g s t o u s e f o r c o n n e ction to a linear amplifier. U s e d w i t h S G - 2 3 5 a n d S G - 5 0 0 . When using a transceiver with the SG-235 antenna coupler and the SG-500 Powercube, the amplifier is keyed from the transceiver via the SG-235 coupler using a dedicated control (PTT) line.
A d j u s t p o w e r w i t h a m p l i f i e r o n : Now you can switch the amplifier on and adjust the input power level, for the desired amplifier output level. Remember, only use the minimum power needed to maintain reliable communications! P e r f o r m a n c e . All four transceivers worked well in the GEO Metro installation. 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 E-mail: SGCMKTG@aol.
Chapter 8 Although this book set out to overview the installation of a m o b i l e 5 0 0 - w a t t s y s t e m u s i n g S G - 2 0 0 0 P o w e r t a l k t r a n s c e i ver mated with a SG-235 Smartuner and SG-500 Powercube, we should mention “barefoot” 150-watt systems. The same advice and procedures covered on cable routing, mounting methods, and vehicle configurations still apply to lower power systems.
• Makes a relatively inexpensive investment. High-quality automotive batteries (usually with a 3 6 - t o 4 8 - m o n t h y e a r g u a r a n t e e ) c a n b e p u rchased at a bargain at various stores. Considering t h e i r i n i t i a l c o s t d i v i d e d o v e r a s e v e r a l y e a r o p e rating life, they represent a good value for the serious mobile operator. SGC Inc. SGC Building, 13737 S.E. 26th St. Bellevue, WA. 98005 USA P.O.
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QMS System Introduction S GC ’s Q MS (Q uick Mo unt Syste m) r e pr e se nts high r e lia bility backed by over 25 years of communications experience. Unpacking QMS We recommend unpacking the QMS antenna system and inspecting the contents.
3. If you will be traveling in an area where overhead restrictions may prevent use of your SG-303 antenna, t h e a n t e n n a s h o u l d b e f o l d e d d o w n a n d s e c u r e d t o p r event damage from brush, trees, or low structures. 4. W h e n c o n n e c t i n g t h e c o u p l e r t o t h e r a d i o / t r a n sceiver, a passageway for the control cable (consisting of an RG-58 coax cable, control wire, power, and ground, plus the optional tuned indicator wire) will need to be provided.
4. Locate the control wire to the QMS, from the transceiver/radio, away from any other wiring inside your vehicle. This control wire contains a high power RF coax cable which can radiate into other wires (such as your head-to-transceiver control cables) causing feedback in your transceiver. 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 E-mail: SGCMKTG@aol.com Website: http://www.sgcworld.
General Installation Information The mobile communication tips found below apply to any m o b i l e i n s t a l l a t i o n , n o t m e r e l y t o t h e Q M S o r o t h e r S G C p r o duct. • For the best performance and radiation, always mount your antenna system on the highest part of the vehicle. Approximately 3 to 15 dB in radiation p e r f o r m a n c e m a y b e g a i n e d i n s i m p l y r e - p o s itioning your antenna system from a low to a high point.
Removing the QMS. Wash the vehicle in the area around the suction cups before removing. This will reduce any chance of surface marring.
Storing Your QMS. To store your QMS unit for long periods of time, apply a thin coating of talcum powder to the suction c u p s . T h i s t r e a t m e n t i n c r e a s e s t h e l i f e s p a n o f r u b b e r p r o ducts.
Selection of Equipment for Go Mobile 500 Watts S G C h a s a s s e m b l e d s e v e r a l p a c k a g e s o f e q u i pment to make it easier for you to Go Mobile. H F R a d i o S y s t e m . This complete installation includes the SG2000 slimpak transceiver with PowerTalk remote head (with mount), the SG-500 SmartCube linear amplifier, and an SG-235 antenna coupler mounted in a quick-mount (QMS) with SG-303 whip antenna. 5 0 0 - W a t t P a c k a g e .
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Frequency Exciter LO in KHz 3700 7200 10150 14300 18150 Forward Power Reflected Power Exciter HI Amp LO Amp HI 26 50 270 440 1 1 2 39 5 5 5 5 Exciter LO Exciter HI Amp LO Amp HI 27 50 300 520 1 2 14 24 5 5 5 5 Exciter LO Exciter HI Amp LO Amp HI 30 50 460 540 0.5 1 30 40 Exciter LO Exciter HI Amp LO Amp HI 28 52 440 560 0.5 0.5 6 8 5 5 5 5 Exciter LO Exciter HI Amp LO Amp Hi 31 56 460 500 1 1.5 8 8 5 5 4 4 21200 Exciter LO Exciter HI Amp LO Amp HI 30 55 520 560 2 3.