10M One quarter band GP antenna for FM transmitter


Sample/Wholesale
Price
Shipping
Carrier
Buy it Now
1 pcs sample
USD
/pcs
USD
Airmail 25days

pcs
USD
/pcs
USD
Airmail 25days


This is a very hands-on production for their own antenna design frequency is 29.600MHz, the type of material used in a large degree of freedom , and are common varieties on the market , simple structure , strong, even if not strong ability friends can be completed within twelve hours , it is recommended to upgrade just started a new HAM use .

Antenna structure is shown :

2014-02-25_165742

The components described in detail below :

(1)in picture is a transducer , the choice of the length of 2.45 m square aluminum tubes , the cross section geometry of about 25mm × 50mm, with a suitable plastic top to prevent rainwater from entering the closure . Oscillator can also be used instead of the thick-walled tube diameter of 20mm , select the square tube reasons .

first, because there are ready-made materials , and second, you want a smooth surface for easy fixing . You can choose copper, stainless steel and other materials on the material , as long as you can meet strength . In the section of the same diameter , the pipe has more than rod bending capacity, and lighter weight, so try to use a vibrator antenna hollow pipe.

The connecting member (2) to the insulating effect of the wood, the section size 30mm × 60mm, length of 600mm, using four long screws fasten the transducer and the support bar , while the terminal has a fixed function of the feeder .

Part (3) is able to meet the strength of any material support bar , the length is determined based on existing material , if prepared in the open roof of the erection of the 10 m antenna height can not be overly pursuit of greater than 2 m can be.

Part(4) is a four member diameter of approximately 6mm screw length is determined according to the actual situation , it is possible to penetrate a certain margin .

PartA is the feeder wire connection point , the use of a fixed oscillator terminal screws do require screw holes as close to the bottom of the vibrator , tighten the nut to prevent the vibrator was crushed , a suitable size can be pre- vibrator pipe plug in electric wood or nylon rod for support skeleton.

PartB Department of Feeder shield and three ground network terminal, also played wiring and use a screw fixation . Screw the edge part B of the distance between the transducer installation (part 1 ) to the bottom of a 10mm gap .

Ground network part is not shown in the diagram, the actual use three 2.5 m long common power flower line , a termination in B of the screw , the other end of the rod at 45 ° unfolded and ropes fixed to the ground , three ground network in in the same plane are arranged average angle of 120 ° . Net change in length or angle can be adjusted within a certain range VSWR value , if no standing waves can be as described above table , the production parameters of the installation , the VSWR value should be about 1.5 .

This antenna can be long-term outdoor use , but should install the screws smear butter, electrical connections should perfusion glass, plastic, in order to avoid the rain corrosion, oxidation.


Sample/Wholesale
Price
Shipping
Carrier
Buy it Now
1 pcs sample
USD
/pcs
USD
Airmail 25days

pcs
USD
/pcs
USD
Airmail 25days


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