SGC SMARTUNER SG-237 Technical Information Page 4
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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
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© 2001 SGC, Inc.
Specifications - Subject to change without notice
HF Frequency Range: 1.8-60 MHz
Power Input Range: 3 to 100 watts (PEP)
Or 40 watts max. on CW
Or 100 watts for 4 second TX and 6 second RX
Number of channels: Unlimited
Revolving memory bins: 168
Input Impedance Range: 45-55 ohms
VSWR: (Typical) Typically less than 1.4:1
DC Input Requirement: +13.8 VDC (nominal)
DC Operating Range: +10 to 18.5 VDC
Input Current: Average: 300 milliamps
Random set time: Typical: less than 2 seconds
Recurrent set time: Typical: less than 10 milliseconds
Antenna Length: Minimum length of 7 ft. - 3.5 to 60 MHz
Minimum length of 23 ft.– 1.8 to 60 MHz
Installation: Any position
Operating Temperature: -35° to +70°C
Power Cable: Shielded 4 conductor
RG-58 coax with PL-259 connector
Power Cable Length: 9 feet in length
Antenna types: 1. Whip
2. Backstay (marine, sail)
3. Dipole centerfed
4. Dipole with feedline
5. Loop (small) 2x2 multi turn
6. Loop (large) 10 ft. and up single turn
7. Longwire
8. Ladder feed
Size: SG-237 9”L x 7”W x 1.5”H (23cm x 18cm x 4cm)
SG-237 Porta 7.25”L x 6”W x 3”H(18cm x 15cm x 8cm)
SG-237 PCB 5.5”L x 6”W x 1”H (14cm x 15cm x 2cm)
Weight: SG-237 2 pounds (1 kg)
SG-237 Porta 4 pounds (2 kg)
SG-237 PCB 1.25 pounds (6 kg)
SG-237 Case ABS plastic on anodized aluminum base
SG-237 Porta Case Extruded Aluminum
Porta Ground System: Four radials of 12 feet each
This manual is produced as a guideline for the SG-237 antenna coupler. Performance and
results may vary and SGC does not warrant any installation or any result. This manual is
subject to change without notice.
SG-237 Manual
page 4
Thursday, July 26, 2001 16:13
Composite
- August 2001 1
- 2
- Table of Contents 3
- Or 40 watts max. on CW 4
- 1.0 SG-237 Supplied Items 5
- 2.0 Mechanical Design 5
- 3.0 Coupler Configuration 6
- 3.2 Tuning Process 7
- 3.3 Impedance Detector 7
- 3.4 VSWR Detector 8
- 3.5 Phase Detector 8
- 3.7 Initialization 9
- 3.8 Jumper settings 9
- 4.1 Program Description 10
- SG-237 Manual 11
- Composite 11
- 4.2 Tuning Paths 12
- 4.2.1 Antenna Too Short 12
- 4.2.2 Antenna Too Long 12
- 4.2.4 JP3—Tune From Memory 13
- 7.0 Optional Smartlock 15
- RF IN-OUT 17
- At least three ground radials 19
- Rotary Aircraft 20
- Base Delta Loop 21
- Base Ladder Installation 22
- Control cable 22
- RF cable 22
- And SOFTWARE LICENSE 23
- Q40105418 31
- 13.0 SG-237 Porta 32
- Q40105420 34
- 14.0 SG-237 PCB 35
- Q60105419 36
- Q40105419 37
- 15.0 QMS System 38
- Common Car Installation 39
- 14.0.5 15.0.6 40
- 15.0.10 41
- 15.0.11 41
- 15.0.12 41
- 15.0.13 42
- 15.0.14 15.0.15 42
- 15.0.16 43
- 15.0.17 43
- 15.0.18 43
- Close-ups of ground 44
- 15.0.22 45
- Installation Precautions 46
- Suction Cups 48
- QMS Housing 49
- Suction Cup Release Tabs 49
- Application Comparison Chart 50
- Technical Comparison Chart 51
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