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SG-211 User’s Manual

© 2004 SGC Inc.

Page 11

A short pigtail connector with an SO-239 female
connector on it will make it easier to use Coaxial cable
with the SG-211.

2.2 Battery Replacement

To replace the batteries inside the SG-211, you must
unscrew the cover and remove it. The screws are on the
left and right sides of the SG-211 as shown below.

The batteries are in two battery holders on the SG-211
circuit board. Any suitable alkaline AA batteries may be

Two Cover Screws on
each side, none on front
and back

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Содержание Smartuner SG-211

Страница 1: ...Catalog Number 54 26 April 2004 The Zero Power Smartuner...

Страница 2: ...he ease of installation and flexible operation make this an ideal choice when power is limited We know that the simplicity reliability and flexibility of the SG 211 will enhance your HF operation for...

Страница 3: ...use local interference both within the station and in the vicinity depending on your power level CAUTION Unbalanced antennas are radiating from the line as soon as they leave the SG 211 Minimize the a...

Страница 4: ...SG 211 User s Manual 2004 SGC Inc Page 2 Quick Start Reference...

Страница 5: ...G 13 3 2 CONNECTING ANTENNAS 13 3 3 BALANCED VS UNBALANCED ANTENNAS 15 3 4 ANTENNA RECOMMENDATIONS 16 3 4 1 Dipoles 16 3 4 2 The Inverted V Antenna 17 3 4 3 Dipoles with Matching Lines 17 3 4 4 Long W...

Страница 6: ...G 211 User s Manual 2004 SGC Inc Page 4 4 2 THE MATCHING NETWORK 36 4 3 THE SENSOR 37 4 4 THE RELAY DRIVER MATRIX 38 4 5 MICROPROCESSOR 39 5 COMPONENT LOCATION 41 6 SCHEMATICS 43 7 STANDARD WARRANTY 4...

Страница 7: ...oduction 1 1 Specifications The SG 211 is a revolution You ve never seen a coupler so light weight or so flexible Never has there been one so easy to carry and use And NEVER have you seen one that wil...

Страница 8: ...re or whip from 1 8 60 Mhz 8 foot wire or whip from 3 5 60 Mhz Installation Any position Operating Temperature 30 to 60 C Size 8 66 inches X 4 69 inches X 1 55 inches Weight 1 lb Case Construction Irr...

Страница 9: ...Aluminum case The RF input connector is an SO 239 on the front of the case RF Output is from balanced and unbalanced connectors on the back Internal construction makes the SG 211 suitable for portabl...

Страница 10: ...SG 211 is ready to go 2 1 Connections to the SG 211 2 1 1 RF Input from your transceiver RF input to the SG 211 is through a standard SO 239 connector on the front Choose good quality coaxial cable wi...

Страница 11: ...int This may require enclosing it in a waterproof enclosure to protect it from the weather Either a balanced or an unbalanced antenna can be connected directly to the wing nuts provided on the back of...

Страница 12: ...side of the balanced feed and the other side of the balanced feed is used for RF Hot If you are feeding your antenna with coaxial cable then the cable is connected to the back panel by connecting the...

Страница 13: ...he SG 211 2 2 Battery Replacement To replace the batteries inside the SG 211 you must unscrew the cover and remove it The screws are on the left and right sides of the SG 211 as shown below The batter...

Страница 14: ...User s Manual 2004 SGC Inc Page 12 used We recommend using the highest quality alkaline AA batteries available to assure the longest life with no battery leakage that could damage the circuit board Ba...

Страница 15: ...antennas 3 1 Optimum Coupling Optimum use of the SG 211 is to place it at the antenna feed point This keeps SWR on the feed line to an absolute minimum 3 2 Connecting Antennas The SG 211 is provided w...

Страница 16: ...the right RF Out connection and the RF Grounding system to the left RF Out and Chassis Ground IMPORTANT NOTE Antenna wire connected to the SG 211 directly will radiate RF This is an RF Hazard and it...

Страница 17: ...an RF Ground to provide the balance Dipoles and loops are typical balanced antennas Unbalanced antennas need an RF Ground such as a radial wire system or a counterpoise to create electrical balance Th...

Страница 18: ...opy of our HF User s Guide from our website at http www sgcworld com ftp Books hfguide pdf For detailed technical information about antennas the consistently best source is the ARRL Antenna Handbook 3...

Страница 19: ...al cable with the center conductor to one side and the shield to the other 3 4 3 Dipoles with Matching Lines Some antennas such as the G5RV use a section of ladder line as a matching device The ladder...

Страница 20: ...tion with the balun removed 3 4 4 Long Wires Inverted Ls Long wire and inverted L antennas are unbalanced antennas They are fed from the right RF Out connection directly with a single wire The RF Grou...

Страница 21: ...to improve the radiated signal from these antennas and minimize RFI generated by the antenna As a minimum an RF Ground can consist of a wire 5 10 longer than the wire antenna and laid out so that it...

Страница 22: ...this may be incorporated into the design of the antenna itself A typical vertical antenna is the GROUND PLANE that includes radials in the design This and many other vertical antennas use an SO 239 co...

Страница 23: ...normally built in this way Coax line can be run from the SG 211 to the base of the antenna The center lead of the coax will feed the radiating element in the flagpole vertical while the coax shield w...

Страница 24: ...ft RF Hot post If you are using coaxial cable to connect the antenna then the center conductor goes to the right most RF Hot post and the braid goes to the left most which is jumpered to the Chassis g...

Страница 25: ...coaxial cable A loop is connected to the SG 211 at the two RF Out connectors Loops can be conveniently arranged either horizontally or vertically The feeding arrangement is the same Loops can take on...

Страница 26: ...in a number of configurations Examples include fixed whip antennas like SGC s SG 307 whip and 10 foot collapsible whips available from a number of vendors One popular antenna uses a whip erected as a...

Страница 27: ...one on each side of the feed point mounted to create a balanced dipole A pair of SG 307 whips in this configuration will be tunable from 1 8 to 60 Mhz Ten foot collapsible whips will be tunable from 3...

Страница 28: ...Buddipole Mast W3FF 12 30 Foot Painter s Pole Costco Home Depot Most Hardware Stores Tripod Mast 6 Foot Portable Antenna Stand MFJ Tee Mount Center Tee Mount W3FF Whips SG 307 Helically Wound Whip SG...

Страница 29: ...nnecting the coax to a coax pigtail 3 5 Tips Tricks 1 The most frequent source of problems in unbalanced antenna systems is the RF Ground RF grounding is frequently misunderstood and poorly implemente...

Страница 30: ...and VICE VERSA Your other electronics can inject RF Noise into your receiver and obliterate your received signal completely 3 Plan your antenna installation carefully 4 Don t commit to a final install...

Страница 31: ...e from http www sgcworld com ftp Books STEALTHman pdf SGC Smartuners for Stealth Antennas http www sgcworld com ftp Books stealth pdf 3 6 2 Books Carr Joseph Practical Antenna Handbook 3rd Edition McG...

Страница 32: ...t Example on a sailboat use the backstay as the antenna since it is the farthest point away from the rest of the vessel 3 The antenna coupler should be installed at the feed point of the antenna 4 Alw...

Страница 33: ...e could be severely damaged Never test a transmitter on the air for the first time if you are unsure about how to operate it or if you are unsure whether it is working properly You could create harmfu...

Страница 34: ...remember that these models typically don t dissipate the transmitter s output as well as an oilcan dummy load The result is that RF will leak out we have heard a few stories of amateurs who were heard...

Страница 35: ...as produced by CW mode operation the coupler setting will settle after a short period of time RADIO TEST PROCEDURE 1 Connect the transceiver light bulb load to the radio RF in out jack 2 Turn on the...

Страница 36: ...radio to the CW mode 5 Key the PTT switch on the microphone and look at the light bulb The light should turn on if the coupler has completed its tuning cycle and if the radio is transmitting 6 For fu...

Страница 37: ...ctance on the input or the output as shown below 4 1 No External Power Required The SG 211 automatic antenna tuner is unique It requires no external source of power This means that the unit can be loc...

Страница 38: ...the microprocessor limits standby current to a few microamperes 4 2 The Matching Network The matching network consists of a four to one step down transformer that also performs an unbalanced to balanc...

Страница 39: ...hed load Locating the balun on the output side as in some other tuners means that the balun sees much more stress with a mismatched load 4 3 The Sensor Transformers T2 and T3 form a directional couple...

Страница 40: ...hematic diagram shows the matrix used to drive the relay coils The latching relays have two coils one for turn on and one for turn off With 16 relays the circuit needs to drive 32 coils A matrix of si...

Страница 41: ...of the matrix 4 5 Microprocessor A PIC flash microprocessor was selected for the very low sleep mode current drain that is key to long battery life Inputs to the microprocessor are forward and reverse...

Страница 42: ...sor is used software can be changed without removing the processor or proms J1 provides connection to the programmer for this purpose Since the processor is dormant except during the actual matching p...

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Страница 48: ...SGC disclaims any other express or implied warranties and liability for any incidental consequential special or exemplary damages in connection with its product even if SGC or its agents are advised...

Страница 49: ...5 H 32 H 64 H 64 H 32 H Output Capacitance minimum 50pf 12 5pf 25pf 12 5pf 12 5pf Output Capacitance maximum 740pf 200pf 800pf 400pf 400pf Installation Any position Any position Any position Any posit...

Страница 50: ...ack or business travel A Perfect Complement to the SG 211 The SG 2020 Use it at your base or in your backpack or travel bag The SG 2020 goes where you want to go Specifications Operating Modes USB LSB...

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