thats no problem,
should i connect the reflector on the antenna? or just hang it behind it and thats it?
should i connect the reflector on the antenna? or just hang it behind it and thats it?
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blind spot?
- Thread starter 8valve
- Start date
it cant be simpler
i hope my friend can do it, because he has his wire antenna on the roof ridge
i hope my friend can do it, because he has his wire antenna on the roof ridge
It really is simple.
You're making a 2 element beam by hanging the reflector wire.
Now the only drawback to it is that you are "pointed" in one direction.
You can get fancy and rig up some rope and pulleys to move the reflector and you can even go as far as hanging additional wires in front of the dipole for directors which will increase your gain.
You're making a 2 element beam by hanging the reflector wire.
Now the only drawback to it is that you are "pointed" in one direction.
You can get fancy and rig up some rope and pulleys to move the reflector and you can even go as far as hanging additional wires in front of the dipole for directors which will increase your gain.
Attached is an EXCEL spreadsheet where you fill in the following information:
1) Site #1, Lat/Long in Deg/Min/Sec (Get from google map or google earth)
2) Site #2, Lat/Long in Deg/Min/Sec (Get from google map or google earth)
3) Transmit Frequency
4) Site #1 & #2, Antenna Gain
5) Site #1 & #2, Antenna Gain
6) Site #1 & #2, Miscellaneous Losses (ie, cable loss)
7) Transmit Power
8) Main Obstacle Height (ie, Hill, Building, etc) in ft
9) Approximate Distance to Obstacle in miles
Look for a Typical Received Signal Level above 3 microvolt for successful contact. This will also calculate the path distance in both Miles and Kilometers. This will help give you a good idea of what is needed for reliable ground wave coverage.
Have fun!
Mike
1) Site #1, Lat/Long in Deg/Min/Sec (Get from google map or google earth)
2) Site #2, Lat/Long in Deg/Min/Sec (Get from google map or google earth)
3) Transmit Frequency
4) Site #1 & #2, Antenna Gain
5) Site #1 & #2, Antenna Gain
6) Site #1 & #2, Miscellaneous Losses (ie, cable loss)
7) Transmit Power
8) Main Obstacle Height (ie, Hill, Building, etc) in ft
9) Approximate Distance to Obstacle in miles
Look for a Typical Received Signal Level above 3 microvolt for successful contact. This will also calculate the path distance in both Miles and Kilometers. This will help give you a good idea of what is needed for reliable ground wave coverage.
Have fun!
Mike
thats a great sheet, im going to play with that one tonight
thanks alot
and when the weather alows it im going to play with reflectors
so little time **Jump_im**
thanks alot
and when the weather alows it im going to play with reflectors
so little time **Jump_im**
Your welcome 8valve. Just remember that this is an approximation; not gospel. You will find times when you can have communications with less than perfect facts and figures. That's what makes radio magical and mystical. Just use this worksheet as a guide; especially at CB frequencies. This worksheet becomes more exact (or closer at best) at VHF and UHF frequencies (150 MHz and above).
73,
Mike
73,
Mike
i know its kind of guesswork and luck at those distances
its kind of an experiment for me for fun
its kind of an experiment for me for fun
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@ AWP:Is it possible to be on a lake and have a homing directional beam being emitted from the shore so a person could navigate to that beam's source? For example at night to a jetty.
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@ BJ radionut:
June VHF
The American Radio Relay League (ARRL) is the national association for amateur radio, connecting hams around the U.S. with news, information and resources.www.arrl.org