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Hy-Gain TH-1 Rotatable Dipole
Hy-Gain TH-1 4-Band Rotatable Dipole
INTRODUCTION
The Hy-Gain TH-1 is a 26 foot 20-, 15-, 10-and 6-meter full legal limit rotatable dipole that is
inconspicuous and low profile, making it almost invisible from across the street. With its 13-foot
turning radius and 8-pound weight, it fits on even small roofs and is perfect for town houses,
apartments and condos - and can easily be turned by a lightweight TV rotator such as the HyGain
AR-35. If necessary, the TH-1 can even be mounted inside an attic!
And this antenna is no wimp! Its bidirectional pattern can help reduce QRM and/or noise while
maximizing your signal in the directions that you want -- so you can work some real DX. High
efficiency traps provide operation up to a full 1500 Watts SSB/CW on 20, 15, and 10 meters. Stub
matching is used on 6 meters for 1500 watt operation on this band as well.
The Hy-Gain TH-1 is built-to-last – using an incredibly strong solid rod fiberglass center insulator and
6063 T-6 aircraft strength aluminum tubing for the radiator. And it assembles in about an hour.
WARNING: Improper installation and assembly can be hazardous! Read these instructions
thoroughly before attempting to assemble, install or operate this product!
transmitting devices produce voltages that can cause severe burns or other injuries.
SPECIFICATIONS
Electrical Specifications
Band
CW
20m
1500 1500
15m
1500 1500
10m
1500 1500
6m
1500 1500
Mechanical Specifications
Mast Size:
Overall Length:
Turning Radius:
Weight:
Wind Load:
Power
SSB
2:1 SWR BW Gain
200 KHZ
400 KHZ
1.1 MHZ
600Khz
1- to 1-1/2" diameter
26 feet
13 feet
8 pounds
1 square foot
Front-to-Side
0 dBd
20 dB
0 dBd
20 dB
0 dBd
20 dB
0 dBd
20 dB
2
Instructions
High power
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Table of Contents
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Summary of Contents for Hy-Gain TH-1
- Page 1 Hy-Gain TH-1 4-Band Rotatable Dipole INTRODUCTION The Hy-Gain TH-1 is a 26 foot 20-, 15-, 10-and 6-meter full legal limit rotatable dipole that is inconspicuous and low profile, making it almost invisible from across the street. With its 13-foot turning radius and 8-pound weight, it fits on even small roofs and is perfect for town houses, apartments and condos - and can easily be turned by a lightweight TV rotator such as the HyGain AR-35.
-
Page 2: Choosing A Location For The Antenna
1 and 1-1/2" OD. Do not use soft or thin wall masts. Portable Operation The Hy-Gain TH-1 may be disassembled as necessary for transporting to a temporary location. Use a permanent marking pen to mark the tube positions for easy re-assembly. -
Page 3: Safety Precautions
Hy-Gain TH-1 Rotatable Dipole Instructions HY-GAIN TH-1 PARTS LIST As you unpack your antenna, verify that the following parts are supplied: Item Part Description Part No. 1-3/8 x 12” AL Tube 175168 1-1/4 x 12” Fiberglass Rod 811-1812 ¼-20 x 1-3/4 bolt 505763 ¼... -
Page 4: Assembly And Installation Procedure
WARNING: Wear safety glasses whenever working with this antenna. Step-By-Step Procedure 1) Find a flat work area with the necessary clearance for assembly. The TH-1 is easily assembled on the ground. 2) After examining the antenna parts, gather the following tools needed for assembly: •... - Page 5 Hy-Gain TH-1 Rotatable Dipole Instructions 1-3/8x 12” AL (2 plcs) Slot Fiberglass Rod ¼-20 hdwr ¼” Solder Balun wire (2 plcs) Lugs (2 plcs) (2 plcs) Figure 2: Center Insulator Assy – Top View 5) Slide the two 1-1/4 x 48” aluminum radiator tubes into each of the 1-3/8” x 12” aluminum tubes mounted to the 1-1/4”...
- Page 6 Hy-Gain TH-1 Rotatable Dipole Instructions 7) Assemble the two small "L" brackets to the two long fiberglass insulators with 6-32 x 3/8" screws (3 each) and the 6-32 kep nuts (3 each) as shown in Figure 5. Hole for 6 or 2...
- Page 7 Hy-Gain TH-1 Rotatable Dipole Instructions Note: The TH-1 is a balanced antenna, and as such should be balun fed. An effective balun can be created by coiling the coax feedline into 6-turns with a diameter of 4-6 inches as close to the antenna as possible (the coil should be no more than about 12-inches from the antenna).
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Page 8: Grounding Considerations
Hy-Gain TH-1 Rotatable Dipole Instructions Tuning the Antenna 1) Adjust the 6-meter resonant frequency first. Then proceed to 10-meters, 15-meters, and finally 20-meters. The SWR should be below 2:1 at resonance on each band. 2) The six meter band is tuned by lengthening or shortening the threaded portion of the stubs. -
Page 9: Maintenance
If you have any problem with this product, first verify that you have assembled, installed and tuned it correctly. If your problem is not solved by following the manual you may call Hy-Gain toll-free at 1-800-647-TECH (8324) or FAX to 662-323-6551, or TELEX 53 4590 MFJ STKV.
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