| Author |
Message |
    
Gator44
Junior Member
Username: Gator44
Post Number: 30
Registered: 1-2007
| | Posted on Tuesday, March 06, 2007 - 12:40 pm: | 
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Was just wondering, can i mount a set of 3 element beams to the side of my tower at 36' or so just for talking somewhat local? I'm not worried about the back side of them, for one I have a big hill there...I just want them for the ears!! I have an Imax-2000 at the top 72' at the feed point, will putting the stationary beams lower affect anything (flat side)? Or will the beams be affected by the tower itself? Just need some help here....thanks! |
Tech833
Moderator
Username: Tech833
Post Number: 1618
Registered: 8-2002
| | Posted on Wednesday, March 07, 2007 - 10:02 am: |
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No problem. If you side mount beams, unless they are horizontal, you need to mount them from the end, not in the middle. In other words, move the tower mounting bracket to the back of the antenna, behind the reflector so that all of the antenna sticks out one direction.
If you keep them at least 18 feet away from other antennas on the same band, there will be no interaction. If they are closer, there will be some, but exactly how much is unpredictable. |
Gator44
Junior Member
Username: Gator44
Post Number: 31
Registered: 1-2007
| | Posted on Wednesday, March 07, 2007 - 1:46 pm: |
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Tech 833, let me make sure i understand you right...you're saying that i can mount the beams on the same tower but make sure the mount bracket is on the back side of the beams?? I'll be mounting the beams on the flat side under my i-max 2000 approx 20' below. I just don't want to mess up the great Tx/Rx on my i-max. I'll be using this for 11 meter and mainly for the Rx on the beams... Thanks for the imput Tech 833. |
Caledonia
Member
Username: Caledonia
Post Number: 63
Registered: 8-2005
| | Posted on Wednesday, March 07, 2007 - 2:19 pm: |
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Unless the locals you are intending to talk to also have horizonally polarized antennas, that setup won't work very well. Mixing polariztions works fine for skywave, but not for groundwave.
Just though you should know that before investing time and money.... |
Tech808
Moderator
Username: Tech808
Post Number: 13182
Registered: 8-2002
| | Posted on Wednesday, March 07, 2007 - 4:41 pm: |
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Caledonia,
To see how Dennis/Tech291 has his Maco V 5/8 mounted above his Flat Side Beams click on the link below as you can do the same with your IMAX.
CLICK HERE > Tech291 PICS
Lon ~ Tech808 ~ N9CEF
CEF#808 ~ CEF HAM#33 ~ CVC#002
10-10 #61493 ~ 10-10 VP#2688
Tech808@copperelectronics.com
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Gator44
Junior Member
Username: Gator44
Post Number: 32
Registered: 1-2007
| | Posted on Wednesday, March 07, 2007 - 6:34 pm: |
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Well..me not knowing much on this i'm really confused now!! What i was going to do was mount a small mast pole to the side of my tower lower than my GP ant.. most of my cbers run beams flat side but no Gp ant. I did'nt want to take mine down. That's where i came up with the idea to run a set of beams flat side mounted to the side of my tower but did'nt know if this would mess up anything as far as RX/TX. 808, I see how 291 has his mounted...which is different from how i was planning to try mine. Keep in mind that all the other folks i talk to are west of me and these will be stationary atleast for the time being unless i really like the performance with them. Again all the help with my project here is greatly appreciated.... |
Gator44
Junior Member
Username: Gator44
Post Number: 33
Registered: 1-2007
| | Posted on Wednesday, March 07, 2007 - 7:00 pm: |
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Sorry guys, I just re-read my posts and boy what a dummy i am....when i said flat side i guess i should've said vertical!! Straight in line with my tower.. Sorry about the confusion. Now, will the beams being along side the tower affect anything as long as the rejection side is towards the tower??? Again sorry and thanks!! |
Caledonia
Member
Username: Caledonia
Post Number: 64
Registered: 8-2005
| | Posted on Wednesday, March 07, 2007 - 7:34 pm: |
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One other point I'd like to make---A single Yagi antenna is a "beam", not "a set of beams." Two or more Yagi antennas are "a set of beams." |
Gator44
Junior Member
Username: Gator44
Post Number: 34
Registered: 1-2007
| | Posted on Wednesday, March 07, 2007 - 9:37 pm: |
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Okay then.. I'm going to put up M103's if this is possible without any problems with my ground plane! Phew...did'nt know this was going to be hard for me to explain. So will this set up work the way i have explained it? Thanks Caledonia..I told ya'll i did'nt have any knowledge of this. |
Tech833
Moderator
Username: Tech833
Post Number: 1620
Registered: 8-2002
| | Posted on Thursday, March 08, 2007 - 10:57 am: |
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I'll try again, using smaller words.
If your antenna(s) are up and down (vertical), then you want to mount them so the big element (reflector) is next to the tower and the whole antenna points away from it. If you mount the antenna(s) flat (horizontal), then you can mount them any place and any way you want under the Imax on top. |
Caledonia
Member
Username: Caledonia
Post Number: 65
Registered: 8-2005
| | Posted on Thursday, March 08, 2007 - 2:56 pm: |
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I still don't know if we are talking about one beam or two beams. When you say "M103's", that sounds like you are talking about two or more antennas. If you had said "put up an M103" then we would know that you are putting up one beam antenna.
Again, ONE Maco M103 is a "beam."
TWO M103's are "beams." |
Gator44
Junior Member
Username: Gator44
Post Number: 35
Registered: 1-2007
| | Posted on Thursday, March 08, 2007 - 5:23 pm: |
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Thanks 833, that answered my question! Sorry about sounding stupid, but sometimes i need it really cracked over my head to understand. Thanks for all the help.. |
