SG-239 TM Smartuner Manual Cat.
SGC — The SSB People SGC develops, manufactures, and sells high performance single sideband (SSB) communications equipment. Since 1971, the company has sold to the marine, military, aviation, and industrial markets worldwide. Over these years, SGC has earned an outstanding reputation for product reliability and for after sales service. The company keeps pace with equipment options, engineering developments, and design requirements.
Table of Contents Specifications ………………………………………….. 5 1.0 Supplied Items ……………………………………… 6 2.0 Mechanical Design …………………………………. 6 2.1 Marine Mounting …………………………………… 6 2.2 Desert and High Temperature Installations ………… 6 2.3 Direct Weather Protection Installations ……………. 7 3.0 Coupler Configuration……...……………………….. 7 3.1 Connections to SG-239………………………………7 3.2 Tuning Process …………………………………….. 8 3.3 Impedance Detector…………………………………. 8 3.4 VSWR Detector…………………………………….. 9 3.5 Phase Detector ……………………………………… 9 3.
SG-239 Quick Start Installation: To quickly install your antenna coupler you will need the following: 1.An HF radio with 1.5 to 200 watts output. 2.An HF antenna with a wire feed. Minimum length of 9 feet (7-30 MHz @ 100W), 40 feet (3-30 MHz @ 200W) or 100 feet (1.8-30 MHz @ 100W). 3.A good ground radial longer than the antenna for the antenna and coupler. 4.+12 VDC and ground for the coupler. 5.SmartLock coupler controller (optional).
Specifications SG-239 HF Frequency Range: 1.8-30 MHz Power Input Range: 1.5-200 watts (PEP) Or CW duty cycle 40% Number of channels: unlimited Revolving memory bins: 165 TX; 5 RX Input Impedance Range: .2-5000 ohms VSWR: (Typical) Typically less than 2:1 DC Input Requirement: +13.8 VDC (nominal) DC Operating Range: +10 to 18.5 VDC Input Current: Average: 230 milliamps Random set time: Typical: less than 2 seconds Recurrent set time: Typical: less than 10 milliseconds Antenna Length: Minimum length of 9 ft.
1.0 Supplied Items SG-239 Coupler Manual Quick-Start Card 2.0 Mechanical Design The SG-239 is supplied in an aluminum case with mounting holes. RF and DC power is supplied to the unit through terminals accessible on the outside of the case. The internal construction is designed to withstand the shock and vibration of marine service. Corrosionresistant hardware and passive alloys are employed throughout. For 99% of installations, the factory settings for jumpers will be correct.
2.3 Direct Weather Protection Installations To protect the unit from direct exposure to sunlight and to prevent heavy build up of ice, we recommend installing the Smartuner first in a waterproof case then placing the case under some kind of protective housing. If you are mounting it on a tower in a hot or cold climate, a plastic wastebasket (such as those made by Rubbermaid™) makes an excellent weather cover and costs only a few dollars.
3.2 Tuning Process An array of detector devices in the SG-239 monitor the antenna system impedance, reactance signal, and the VSWR load when RF power is applied to the unit. The coupler also monitors forward power, since the control computer requires an indication of both forward and reflected power in order to allow tuning to proceed. The computer uses the forward power detector as a check to ensure that the measurements made are applied RF and are not spurious levels from the data conversion system.
3.4 VSWR Detector A directional coupler is made up of a current transformer T2 and a voltage transformer T1, in conjunction with termination resistors R35, R36 and R33, R34. The coupler is inserted in the 50-ohm transmission line between the input connector, ST2 RF - ST3 GND, and the tuning network. The forward power is measured across termination R33, R34 and reflected power is measured across termination R35, R36.
tuning algorithm is complete, the CPU saves the settings in its EEPROM, which is addressed by the applied RF frequency. This non-volatile memory table is the basis of the exclusive learning feature of the SG-239. After it has stored and latched the network status, the CPU waits for RF to cease transmitting and returns to the Stop mode. When RF is re-transmitted, the first step in the tuning algorithm is to measure the frequency of the signal passing through the coupler.
rather than use previously stored information. The default is: Tune From Memory: [YES]. 4.0 Tuning Process and Options MicroTune™ Software Copyright 1991-2001 The SG-239 MicroTune™ Software is unique software which allows precise tuning of the digitally controlled π and L network to tune a wide variety of antennas. The versatile MicroTune™ software offers its user these special functions: 1. The coupler is activated whenever forward power is present. 2.
removed and the 'tune' indicators are turned off. At this time the computer reverts to a "sleep" mode awaiting RF power or pushbuttons S2-S8 in Manual Mode. 4.1.1 Auto Mode Detecting forward power. Once forward power is detected and the optional SmartLock is switched to Normal, the current coupler settings are sent to the relays. Next, the VSWR is checked and the frequency measured. If the VSWR is greater than 2:1 or a difference in frequency is detected, the program branches to the re-tune program.
the program waits for forward power to cease (if it has not ceased already) and returns to stop mode. At this point the user should try several other frequencies. If the “no-tune” condition persists, check the installation of the antenna, coupler, radio, and ground system for possible problems. Signaling “OK tune.” If the coupler achieves a good VSWR during the tuning sequence, the program branches to the “OK Tune” section of the code. Here, the tune indicators are engaged.
input capacitance until a low VSWR is measured of less than 2:1. This process will continue until the VSWR has climbed back to higher than 2:1 or the impedance has become high. 4. The settings that gave the lowest VSWR have been kept in memory and are now recalled to verify it is a low VSWR 5. At this point the tune indicators are engaged.
plex is the predominant mode of operation, then No is usually the better choice. 4.2.4 JP3—Tune From Memory (Factory Default Setting: Yes) YES - In this position the coupler will recall data previously saved and try this data before attempting to re-tune. If the data is valid and the VSWR is less than 2:1 the tune is completed. In this position the coupler will save any new data in its memory for any frequency. A new frequency must first be learned, while in this mode, before it can be recalled.
2:1 This LED will light when the VSWR is greater than 2:1. It will extinguish when VSWR is less than 2:1. PHZ This LED indicates the status of the antenna reactance. When lit, reactance is inductive. When off, reactance is capacitive. FWD This LED indicates the presence or lack of RF power from the radio. When transmitting, the LED will light to indicate RF is being detected. In receive, the LED should be extinguished.
operator may change frequency and the coupler will not tune. It may eventually burn coils and/or relays. 2. Reset function is convenient to force a reset in situations where a coupler will not retune. For example, the last tune achieved on 14.100 with VSWR 1:1.7, the coupler is instructed not to retune until it reaches 1:2.0 - If the coupler is reset and therefore will retune at your next transmission it may tune to 1:1.1 or much better before the last read of 1:1.
+13.6VSW RED R3 330 + 1 3 .6 VSW GREEN TUNED FROM COUPLER WHITE NO TUNE / RESET FROM COUPLER BLA CK Q1 2 N2 2 2 2 NORMA L RESET R1 150 GROUND 1 3 6 4 D1 1 N7 5 7 2 Gr een Whi t e Bl ack C2 0 .1 µ F CA1 C1 0 .1 µ F SW1 DPDT SW2 PUSH But t on DS2 Red LED DS1 Gr een LED Red 5 R2 330 C3 0 .1 µ F 7.0 SG-239 Enhanced Features 1. Clear (Erase) all 170 memory bins A. Set Auto-Manual slide switch position to AUTO. B. Remove DC power from SG-239 C.
End of procedure 3. Manual tuning in transmit A. Set auto-manual slide switch position to manual. B. Engage transmitter. Not more than 10-15 watts is recommended to avoid accidental RF burn. C. Use S3 thru S8 to tune the SG-239. Each time a switch is depressed, the status LED’s are updated. D. You may save the settings for this frequency by momentarily depressing ‘SAV’, (S2) while transmitting. End of procedure 4. Manual tuning in receive - “Silent Tuning” A.
pressed. D. Momentarily depress ‘SAV’ (S2) and saved settings will be recalled from displayed RX memory bin. End of procedure Additional Notes: Note 1: Saving and recalling receive only memories The two procedures are basically the same with the exception of the auto-manual slide switch. SET TO MANUAL SAVE SET TO AUTO RECALL Note 2: Fine tuning a transmit frequency Auto tune the frequency as normal.
Unfortunately, when you use a can-type dummy load, you can't see "what's happening" with your transmitter. In this case, you can use a light-bulb dummy load to test your transmitter. Here, the light bulb is directly connected to the output of the transmitter and it dissipates the RF energy as light.
* 100 watt radio transceiver * Any SGC Smartuner or equivalent RADIO TEST PROCEDURE 1. Connect the transceiver light bulb load to the radio RF in/out jack. 2. Turn on the radio and set the CW mode. 3. Key the PTT switch on the microphone and look at the light bulb. If the light bulb load is connected and the radio is transmitting, the light should turn on. 4. Set the radio to SSB mode. 5. Key the PTT switch on the microphone and talk into the microphone. Notice that the light turns on when you talk.
ble from your operating point. 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 must be installed at the base of the antenna. 4. Always create your own ground with radial wire or copper straps. They are the only ones that will guarantee a solid and proper ground system. 5. All cables - power supply, control or coaxial - must always be as short as possible and/or necessary.
SG-239 SGC LIMITED PRODUCT WARRANTY (1 Year Parts and Labor) And SOFTWARE LICENSE You have purchased an SGC equipment product together with a license to use the software installed in that product. Please return the warranty registration card that accompanies this product, so that we can assure that you receive proper warranty service and important notices that may affect the product.
11.0 Component Location Mailing: PO Box 3526, Bellevue, WA 98009 Shipping: 13737 SE 26th St., Bellevue, WA 98005 Toll-Free: 800-259-7331 • Phone 425-746-6310 • Fax: 425-746-6384 www.sgcworld.com • Email: sgc@sgcworld.
SG-239 Manual page 26 RF PATH ST2 RF ST3 GND T2 C B 100 1W R35 A T1 1W R33 100 R1 100 R27 33 1W 15p C8 T3 D5 1W R28 33 10 R31 2 5 6 7 A1 100 8 1 C12 .01u R29 390 R14 3 4 3 3.3K 10k R12 3.3K 4 C11 .01u R15 R16 1.5K 10k 1 C L P R R10 CLK D U2A 74F74 R19 VCC 2 2 C16 .1u 74HCT14A U11A R26 D7 10k R11 .01u 1k R30 R20 1.5k 1 D6 27k R18 5.6k R21 R3 1.5k C13 D8 D9 D3 D1 C6 R36 100 1W .001u C7 .001u D2 .1 R34 100 1W C9 .01 C14 .
Mailing: PO Box 3526, Bellevue, WA 98009 Shipping: 13737 SE 26th St., Bellevue, WA 98005 Toll-Free: 800-259-7331 • Phone 425-746-6310 • Fax: 425-746-6384 www.sgcworld.com • Email: sgc@sgcworld.com SG-239 Manual page 27 27 Wednesday, October 17, 2001 08:31 Composite IMPDNCE PHASE REV FWD R32 1.5K C-JP1 SAV C28 .01u C-JP3 'Z'1 PHZ1 REV1 C-K6 Phase R49 10k C27 .01u C26 .01u .
Mailing: PO Box 3526, Bellevue, WA 98009 Shipping: 13737 SE 26th St., Bellevue, WA 98005 Toll-Free: 800-259-7331 • Phone 425-746-6310 • Fax: 425-746-6384 www.sgcworld.com • Email: sgc@sgcworld.com © 2001 SGC, Inc. SG-239 Manual page 28 Wednesday, October 17, 2001 08:31 Composite U712 U713 U714 U715 U716 U717 U718 U719 U7[11..18] C32 .01 C42 .01 C40 .01 .01 C34 C41 .01 U7[12..18] C43 .01 C33 .01 10 11 12 13 14 15 16 17 18 12V C39 .01 C46 DATA C30 .
Mailing: PO Box 3526, Bellevue, WA 98009 Shipping: 13737 SE 26th St., Bellevue, WA 98005 Toll-Free: 800-259-7331 • Phone 425-746-6310 • Fax: 425-746-6384 www.sgcworld.com • Email: sgc@sgcworld.com SG-239 Manual page 29 29 Wednesday, October 17, 2001 08:31 Composite RF PATH 100p C63 100p C62 C61 100p 200p C60 200p C59 330p C58 470p C57 620p C56 C54 1000p L1 C64 51p 10 K19 K18 K17 K16 R74 C91 .1 K21 K20 .1u K12 . 25 10 C72 L2 R73 .1u K11 0.125u C90 .1 C88 .1 C89 .
Mailing: PO Box 3526, Bellevue, WA 98009 Shipping: 13737 SE 26th St., Bellevue, WA 98005 Toll-Free: 800-259-7331 • Phone 425-746-6310 • Fax: 425-746-6384 www.sgcworld.com • Email: sgc@sgcworld.com © 2001 SGC, Inc. SG-239 Manual page 30 Wednesday, October 17, 2001 08:31 Composite .1u C102 VCC ST-GND ST-HLD ST-TND ST-12V RFP 8 3 6 7 TND 10 R83 220K 1W VOUT CAP- CAP+ ST4 5 4 2 RESET/HOLD 74HCT14A C111 .033u 630V 7660 V+ GND LV OSC U9 U11E 11 C112 .033u 630V C101 .1u .
Mailing: PO Box 3526, Bellevue, WA 98009 Shipping: 13737 SE 26th St., Bellevue, WA 98005 Toll-Free: 800-259-7331 • Phone 425-746-6310 • Fax: 425-746-6384 www.sgcworld.com • Email: sgc@sgcworld.com SG-239 Manual page 31 31 Wednesday, October 17, 2001 08:31 Composite MDE VCC MAN CI-U CI-D L-U L-D CO-U CO-D SAV R37 10K VCC S1 C31 .1 R94 10K C36 .1 R95 10K D16 R44 10K MANUAL AUTO D17 C38 .1 DS2 DS1 R66 2.2K R42 10K D19 R61 2.2K C50 .1 R43 10K D18 VCC C51 .1 C53 .
SG-239 HF Smartuner™ Catalog Number 54-22 SPECIFICATIONS: Power (max): 200 Watts PEP or CW* Power (typ): 1.5 Watt PEP or CW* Range ≥9ft. Ant. 7-30MHz @ 100W Range ≥40ft. Ant. 3-30MHz @ 200W Range ≥100ft. Ant. 1.8-30MHz @ 100W Input Voltage: 12.6 VDC (nominal) Voltage Range 10 - 18.5 VDC Impedance Range .2 - 5000 ohms Low Current Drain Typical 230 mA ANTENNAS: 1. Whip 2. Backstay (marine, sail) 3. Dipole centerfed 4. Dipole with feedline 5. Loop (small) 2x2 ft. multi turn 6. Loop (large) 10 ft.
Notes: Mailing: PO Box 3526, Bellevue, WA 98009 Shipping: 13737 SE 26th St., Bellevue, WA 98005 Toll-Free: 800-259-7331 • Phone 425-746-6310 • Fax: 425-746-6384 www.sgcworld.com • Email: sgc@sgcworld.
Model SG-239 SG-237 PCB SG-237 SG-237 Porta SG-230 SG-231 SG-235 Introduction Year 2001 1999 1999 1999 1987 1995 1992 SGC Catalog Number 54-22 54-19 54-18 54-20 54-12 54-17 54-15 x x x x x x x x x x x x x x x x x Mailing: PO Box 3526, Bellevue, WA 98009 Shipping: 13737 SE 26th St., Bellevue, WA 98005 Toll-Free: 800-259-7331 • Phone 425-746-6310 • Fax: 425-746-6384 www.sgcworld.com • Email: sgc@sgcworld.com © 2001 SGC, Inc.
SG-239 SG-237 SG-230 SG-231 SG-235 1.8 - 30MHz 1.8 - 60MHz 1.6 - 30MHz 1 - 60MHz 1.8 - 30MHz Power Input Range (PEP 1.5 - 200 3-100 3-200 3-100 3-500 Cont. CW Power (watts) 80 40 80 60 200 Input Impedance Range 45-55 45-55 45-55 45-55 45-55 VSWR (Typical) <2:1 <2:1 <2:1 <1.4:1 <2:1 DC Input Requirement 13.8 13.6 13.6 13.6 13.6 DC Op. Range (VDC) 10 to 18.5 10 to 18 10 to 18 10 to 18 10 to 18 Input Current (avg. amps) 0.23 0.3 0.9 0.5 1.
SG-239 SMARTUNER™ Antenna Coupler Cat.
