SGC Smartuner SG-235 Specifications

SG-235 Smartuner®Microprocessor Controlled Automatic Antenna CouplerInstallation and Operations ManualGetting the most from every watt of HF-SSB Power

1011..33 OOvveerraallll DDeessccrriippttiioonnThe SG-235 is a general purpose coupler which can operate with any type ofHF radio and almost any type

If broadband operation is required during scanning operations, jumper JP-2on the printed circuit board inside the coupler may be set to the ÒYESÓ mode

1211..66 MMeecchhaanniiccaall DDeessiiggnnThe SG-235 is supplied in a weather proof case with two mounting brackets. RFand DC power are supplied to

protective housing is recommended. The preferred installation if vertical iswith the standoff insulator pointing upward.A stuffing gland for the RF an

1411..77 RReemmoottee IInnssttaallllaattiioonnssThe SG-235 is supplied with a standard 25 feet of cable. If necessary, the coupler can be installed

11..88 UUppggrraaddee SSeeqquueenncceeThe current version of the SG-235 coupler will have a revision letter locatedon the printed circuit board. To

1622..00 SSppeecciiffiiccaattiioonnss -- SSGG--223355HF Frequency Range: 1.8 to 30.0 MHz Note: The SG-235 may be operated as low as 1.6 MHz an

33..00 PPaarrttss FFuurrnniisshheedd ((uunnppaacckkiinngg))Antenna Coupler25 foot special cable (RG-58 plus 12 conductors in a single jacket)Instruc

18detail. If you are dealing with a marine installation, you should have a description of the vessel's bonding system. If you are using the coup

44..00 AAnntteennnnaa TTyyppeessRReeccoommmmeennddeedd AAnntteennnnaassSG-105 - Marine and Base station antenna. This is a 60-foot end-fed long wi

Globally, HF-SSB has literally changed the world. For a minimal investment, it has allowed millions of people - often inamazingly remote settings, oft

20a conventional Vee antenna as an inverted Vee. The coupler is very flexiblein this regard.44..11 AAnntteennnnaa SSeelleeccttiioonnThe automatic an

AAnntteennnnaa LLeennggtthh vvss.. LLoowweesstt TTuunnaabbllee FFrreeqquueennccyyAntenna Length Lowest Frequencyin Feet (approximate) in KHz350

2255..00 TTyyppiiccaall IInnssttaallllaattiioonnssFigures 5.01 through 5.3.1 show some typical installations for the automaticantenna tuner. FFi

FFiigguurree 55..0033 MMoottoorr VVeesssseell iinnssttaallllaattiioonnFFiigguurree 55..0044 BBaassee iinnssttaallllaattiioonn23© 1998 SGC IncSG-2

24FFiigguurree 55..0055 BBaassee iinnssttaallllaattiioonn wwiitthh ggrroouunndd wwiirree rraaddiiaallssFFiigguurree 55..0066 BBaassee ddiipp

FFiigguurree 55..0077 BBaassee QQuuaaddrraa LLoooopp HHoorriizzoonnttaallThe horizontal quad loop is a groundless antenna for high angle radiati

26FFiigguurree 55..0088BBaassee LLaaddddeerrIInnssttaallllaattiioonnFFiigguurree 55..0099 BBaassee DDeellttaa LLooooppThe delta loop antenna

FFiigguurree 55..1100 VVeesssseell GGrroouunnddlleessss LLooooppThe triangular loop antenna for sailboats is designed to operate in a ground-less e

28The insulated backstay antenna requires two porcelains isolators. The couplermust be placed as close as possible to the base of the backstay antenna

achieved with the loop mounted vertically. The vertical loop antenna of onequarter wavelength is the basis of the "quad" type directional

SG-235ANTENNACOUPLERInstallation and Operations ManualPrepared: September 19983© 1998 SGC IncSG-235 ManualSGC Inc. SGC Building, 13737 S.E. 26th St.

30An End fed antenna could be very effectively used if a metal cabin structure isavailable. Loop antennas have the advantage of not requiring a groun

When installed in high performance turboprop or jet aircraft, the Smartunerwill operate well with a shunt fed antenna. This is generally a 13 foot pi

32to secure the joints with hoseclamps or plumbers tape toassure low resistance connec-tions.C. Masonry chimneys arevisually "busy". You ca

antenna and a strongly built (Mylar or nylon) kite.Remember that when a mast comes down, you have easy access to the highvoltage feedline which may be

345. Strung between rooftops of buildings.6. Sign posts such as for banks and gasoline stations.7. Telephone (not power) poles. There's no line

expected in your radiation or receiving characteristics. This is the equivalent of transmitting with 400 watts, when in actuality you are using only

36SG-235 coupler is specifically designed to be used for such applications.9. For vehicular installation, do not use any inexpensive CB antennas and/o

2. The antenna should be kept as far away as possible from buildings, trees and vegetation. If metallic masts or supports are used, arrange the insul

3866..33 GGrroouunndd SSyysstteemmss -- GGeenneerraallThe ground system (also called a counterpoise) is a key part of the overallantenna system and

In a sailboat installation, we generally place the Smartuner in the aft lazaretteand then run at least three runs of foil forward. One runs up the po

4QQuuiicckk SSttaarrtt GGuuiiddeeRemote Manual TuningTo quickly install your antenna coupler you will need the following:1. An HF radio installation

40and should be installed as close as possible to the tuner. It may be necessary touse several ground rods bonded together to improve the ground cont

Use jumpers around metal backstay triangles on split backstay antennas.Corrosion may cause up to several hundred ohms of resistance to occur eventhoug

4277..00 IInnssttaallllaattiioonn PPrroocceedduurreessThe following diagrams will assist in installing the Smartuner with SGC equipment.77..11 IInnss

OOnn AAllll RRaaddiiooss:: The SG-235 requires only a source of 13.6 VDC, an RF transmission line (RG-58/U up to 30 ft., RG-8 OR RG-213/U if over

44CC oonn nn ee cctt ii oonn ss ::SS mm aa rr tt LL oo cc kk PP rr oo ttoo SS GG--22 33 55 SS mmaarrttuunneerr Red Ñ Red wire (+12 VDC)Gre

77..44 WWEEAATTHHEERRDDEECCKK MMOOUUNNTTIINNGGWeatherdeck mounting can be used. Years of experience have shown thatinside mounting or even splash-pr

46SGC Inc. SGC Building, 13737 S.E. 26th St. Bellevue, WA 98005 USAP.O. Box 3526, 98009 Fax: 425-746-6384 Tel: 425- 746-6310 or 1-800-259 7331 E

88..11 AAlltteerrnnaattee EElleeccttrriiccaall CChheecckkoouuttOOnn SSii ttee RRaadd iioo HH FF// SSSSBB TTrraannssmmiitttteerr &&

486 - If the coupler operates as described above, it is almost certain that it willgive satisfactory service with a proper antenna. If you are still h

A light bulb connected to the antenna jack of a radio is simple and effectivemethod to test if your radio is transmitting. The instruction below expla

TTaabbllee ooff CCoonntteennttss1.0 General information 81.1 Experience Levels of Users 81.2 What is an Antenna Coupler? 81.3 Overall Description 10

508. Set power to HI 9. Set the radio to AM mode or CW and any carrier. 10. Key "push to talk" switch on microphone, and observe the light b

CCoouu pp lleerr TTeesstt PPrr oocceedduurree CC oonnttii nnuueedd NNoottee::The light bulb may not come on immediately if the coupler has no

52network, eight inductors in the series arm, and five more capacitors in shunton the output arm, all arranged in binary increments. Relays are provid

pler as noted from the generator. A line current sample is compared in phasewith a voltage sample in a double balanced mixer. Output polarity is posit

5488..99 IINNFFOORRMMAATTIIOONN RREEAADDThe data sensors are interfaced with the CPU through input ports PA3 throughPA7. After an IRQ, the tune alg

SSGG--223355 MMiiccrrooTTuunneeªSSooffttwwaarree Copyright November-199199..00 TTuunniinngg PPrroocceessss aanndd OOppttiioonnssThe SG-235 MicroT

56¥ Facilities and algorithms are used, which enable accurate tuning at the low end of the frequency band, and the use of even shorter antennas than

The recalled data is then tested for validity. If the data proves invalid, it isbypassed and re-tuning is performed. If the data recalled proves valid

58tests and appropriate subroutines are executed throughout the tuning process.Following are examples of the activity that occurs when the tuner must

99..44 AAnntteennnnaa ttoooo lloonnggOnce the tuner has verified RF power, the tuning sequence is as follows:1. Output capacitance is added until in

66.0 General Notes on Antennas and Couplers 346.1 Steps to Antenna Installation 366.2 Antenna Location 366.3 Ground Systems - General 386.3.1 Vehicle

60If typical operation is out of band duplex, '"YES'" would be most likely to givebetter performance. If in band operation is typ

99..77 JJPP33 -- PPTTTT oouutt CCoonnttrrooll(( FF aacctt oo rr yy dd ee ff aa uu ll tt sseettttiinn gg :: YY EE SS))YYEESSIn this position,

62and store the new setting in memory, over writing any previous settings. Toreturn to normal Tune From Memory, simply push the reset button while inN

63© 1998 SGC IncSG-235 ManualSGC Inc. SGC Building, 13737 S.E. 26th St. Bellevue, WA 98005 USAP.O. Box 3526, 98009 Fax: 425-746-6384 Tel: 425-

64SGC Inc. SGC Building, 13737 S.E. 26th St. Bellevue, WA 98005 USAP.O. Box 3526, 98009 Fax: 425-746-6384 Tel: 425- 746-6310 or 1-800-259 7331 E

In working through the logical troubleshooting process with him, we discov-ered that he had used coaxial feed line from the insulator on the coupler

66SGC Inc. SGC Building, 13737 S.E. 26th St. Bellevue, WA 98005 USAP.O. Box 3526, 98009 Fax: 425-746-6384 Tel: 425- 746-6310 or 1-800-259 7331 E

1111..44 AA FFiinnaall PPooiinntteerr oonn TTrroouubblleesshhoooottiinnggRemember that the SG-235 is an excellent piece of equipment which wi

68SGC Inc. SGC Building, 13737 S.E. 26th St. Bellevue, WA 98005 USAP.O. Box 3526, 98009 Fax: 425-746-6384 Tel: 425- 746-6310 or 1-800-259 7331 E

NNootteess69© 1998 SGC IncSG-235 ManualSGC Inc. SGC Building, 13737 S.E. 26th St. Bellevue, WA 98005 USAP.O. Box 3526, 98009 Fax: 425-746-6384 T

10.1 Tune, Tune Lock, and Reset 6110.2 Smartlock PRO Notes 61Quick Start Guide - Remote Manual Tuning 6211.0 Troubleshooting the SG-235 - General 6311

AppendixÑ QMS SystemIntroductionSGCÕs QMS (Quick Mount System) is the newest addition to the many outstandingproducts manufactured by SGC, Inc. that i

A-23. If you will be traveling in an area where overhead restrictions mayprevent use of your SG-303 antenna, the antenna should be folded down andsecu

4. When connecting the coupler to the radio/transceiver, a passagewayfor the control cable (consisting of an RG-58 coax cable, control wire,power, and

A-4FFiigguurree AA--33ÑÑMMoouunnttiinngg aattoopp llaarrggee ttrruucckk ccaabbIInnssttaallllaattiioonn PPrreeccaauuttiioonnssTo ensure safe oper

2. Insure that the high voltage wire protruding from your antenna systemis not routed near any metallic objects such as your vehicleÕs frame or metalp

A-6GGeenneerraall IInnssttaallllaattiioonn IInnffoorrmmaattiioonnThe mobile communication tips found below apply to any mobile installation,not mere

UUss ee ooff tthh ee gg ee ll cc ee ll ll bb aa tt tt ee rr yy mm aa yy rr ee qquu ii rr ee aa ll ee ss ss ee rr ggaa uugg

811..00 GGeenneerraall IInnffoorrmmaattiioonnThe Smartunerª reputation has grown to legend status because it is simple touse and highly reliable. A

A-8This will prevent slow leakage of air, which will reduce the holding power of the suction cups over time. It will also protect the painted surface.

¥ To make removal of the unit easier, you may slide a piece of paperbetween the suction cup and the vehicle surface (see Figure A-3). In this way, e

The Quick Mount Systemfor any mobile HF rigNo CompromiseCommunicationsQMSAntennaCoupler System• QMS offers unsur-passed frequency agility needing no u

Specifications:(QMS-7 specifications included on separate brochure.)QMS-b2 cat.# 55-47QMS-b3 cat.# 55-48Total QMS system weight:21 lb.Overall QMS case

When evaluating the 12 volt SG-500SmartPowerCubeTM, the key word is “smart.”because the SG-500 is not just another mind-less mass of wire and diodes s

Power Output:SSB: 500 watts PEPCW: 500 watts 10 Min. (no fan) 500 watts Unlimited with fan AM: 250 watts Carrier max.Frequency Range: 1.6-24 MHz (U.S

SG-235SpecificationsHF FrequencyRanges1.8 to 30MHzPowerInput Range:5 to 500 watts (PEP)Input ImpedanceRange:45 to 55 ohmsVSWR:Typical—less than 2:1DC

SG-235500 watt Smartuner™ Smart Tuning—Now at 500 watts.Now you can achieve perfect coupling of your500-watt HF-SSB to your antenna.Now you can go mob

¥ A tuner placed at the transmitter loads up the feedline as well as the antenna (so that the feedline radiates). ¥ A coupler installed at the ante