| Author |
Message |
    
852
Intermediate Member
Username: 852
Post Number: 179
Registered: 3-2006
| | Posted on Saturday, November 25, 2006 - 6:56 pm: | 
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My question is on Coppers base ant. page they advertise the SOLARCON I-MAX-99 1/2 WAVE ,yet it's no longer available,it states the entire antenna radiates. Is this true for the Imax 2000 also? And if so why is it so important to get the feedpoint to 36 feet? My inquiring mind is searching for a answer. I've always been told the only stupid question was the one that went unasked.
Tommy 852
CEF750
Your friend on this end. |
Tech833
Moderator
Username: Tech833
Post Number: 1522
Registered: 8-2002
| | Posted on Sunday, November 26, 2006 - 12:33 am: |
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Yes, the entire Imax 2000 radiates.
The reason you want the feedpoint up higher is because it improves the take-off angle. In other words, it keeps more signal down near the ground instead of sending up in the clouds. |
Starface
Advanced Member
Username: Starface
Post Number: 919
Registered: 1-2005
| | Posted on Saturday, November 25, 2006 - 11:53 pm: |
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SOLARCON I-MAX-99 1/2 WAVE ,yet it's no longer available I have no idea about that.
why is it so important to get the feedpoint to 36 feet?
36 feet is one wavelength
72 feet is another
thats why its So important to get it at least to the frist 36 feet and then to 72 feet if you want another wavelength.
Just the Radio Wave Pattern work.
Starface
CEF476
CVC14 |
Biskybabyusa
New member
Username: Biskybabyusa
Post Number: 5
Registered: 11-2006
| | Posted on Sunday, November 26, 2006 - 6:03 pm: |
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Is that to the tip ? My Imax 2000 is about 50 to the tip ! Thanks. |
Tech808
Moderator
Username: Tech808
Post Number: 12379
Registered: 8-2002
| | Posted on Sunday, November 26, 2006 - 6:27 pm: |
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Biskybabyusa,
If the TIP of your IMAX 2000 is at 50' this means the Bottom/FEEDPOINT is ONLY 26' from the ground.
So you would need to raise it another 10' to have the FEEDPOINT at 36' or 1 wave length since the IMAX is 24' long.
On the IMAX 2000 it is measured to the BASE or (LOAD) of the antenna NOT the tip of the antenna.
Hope this help's,
Lon
Tech808
CEF808
N9CEF
CVC#2 |
Chad
Senior Member
Username: Chad
Post Number: 1228
Registered: 11-2004
| | Posted on Sunday, November 26, 2006 - 10:58 pm: |
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Raising mine to 36'+ made a BIG difference! I was at 20-25' and had all sorts of isues. The new tower, same coax (left slack), same antenna, same rig, performed MUCH better when it crossed the magic 36' mark. And not just receive/transmit performance.
Chad |
Biskybabyusa
New member
Username: Biskybabyusa
Post Number: 6
Registered: 11-2006
| | Posted on Monday, November 27, 2006 - 7:07 pm: |
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Thanks for the info Lon ! |
Road_warrior
Senior Member
Username: Road_warrior
Post Number: 2023
Registered: 7-2004
| | Posted on Saturday, December 02, 2006 - 12:24 am: |
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My I-10k is 45ft to its feedpoint.
(Bottom of antenna). |
Bridge_man
Junior Member
Username: Bridge_man
Post Number: 47
Registered: 3-2006
| | Posted on Saturday, December 02, 2006 - 12:19 pm: |
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how about an anntron-99?mine is on a light pole about 25' to the bottom of the ant.and yes the pwr co.'s light is on the pole and working,but i get no interfernce from the light like everyone said that i would. is this in the right wave length?or do i need to raise it up another 11'? |
Road_warrior
Senior Member
Username: Road_warrior
Post Number: 2027
Registered: 7-2004
| | Posted on Saturday, December 02, 2006 - 11:29 pm: |
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Another 11 ft up and it will be at 1 wavelength. |
