| Author |
Message |
    
Len
| | Posted on Sunday, February 03, 2002 - 11:50 am: | 
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Ok just curious I have a maco 3 element beam and wich is better to run on?
1; Vertical or horizontal.
I know with a beam the higher the better where I live I am on the highest spot in town.
And which way would produce less TVi.
Back in the 70's I had a avonti 3 element beam I put it up 50 ft with no problems but with that type you had do go vertical because of the hoop on it.
And if I go horizontal I would put my I max 2000 on top of it.
The type of rdios I run is a RCI 2970 D-104 silver eagle and for back up a cobra 2000 also with a D-104 but Night eagle no extra but what the radios have.
I hope this is not to stupid of a question I hope some one can shed some light on this for me.
I have a couple months to go before I start this project it's to coold here in Minesota right now burrrrr. Thank you
73's Len #111 So,Minnesota |
151 S.E.I
| | Posted on Monday, February 04, 2002 - 6:34 am: |
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Well it depends on who you want to talk to and thier polarization, either horz/vert. tv sets run horizontal antennas.most cbers run verticals unless durring dxing conditions when some go to horizontal to better reach the long distance skip.
get her up well over all powerlines height and keep the modulation at under 100%(too much modjo is a bad thing! "it bleeds") "i wish someone would tell heatpump this" ,run a low pass filter behind the radio,ground the antenna and tower well,coil the coax in a 6 turn 6 inch coil
near the conector of the antenna this helps keep
the coax from radiating rf to your neighbors
electronics as well.
goodluck |
Marconi
| | Posted on Monday, February 04, 2002 - 8:20 am: |
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Len, my preference would be to go horizontal with the Imax up above only if you are going on a good tower. If you are going to use a pushup, then the Imax may be a little much to guy well if you want the beam at 50' again.
I would go flat unless you have local buddies that are only vertical and you want to work the beam with them. IMHO, a horizontal beam works DX much better, most of the time, than a vertical one. There are exception, however.
Good luck
Marconi
39ZERO |
RCI2990
| | Posted on Monday, February 04, 2002 - 6:26 pm: |
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Hmm.. I found my moonraker 4 bleeds 2 TVs here in the house on the horizontal side more than verticle. Ive tried everything, redoing my ends here in the radio shack, running a filter, double shielded coax, grounding the heck out of my antennas both outdoors and i even grounded my switchbox. My Avanti sigma 4 doesnt even raise a whisper out of any of the TVs.... its only when i talk horizontal.
SWRs on Horizontal are 1.1=1 CH 40 1.2=1 CH 1
Verticle.. 1.5=1 CH 1 and 1.1=1 CH 40.
I dont think i bother anyone else in my town because ive been radioing for 10 eyars and no one has said a thing... its just the TVs in the house........ |
Len
| | Posted on Monday, February 04, 2002 - 10:35 pm: |
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Ok thank you all for the input as stated I have a couple months to go. Bfore it comes together I am working on a 50 ft tower. And high lines not a problem were I live all buried just street lights. Thank's agian 73's Len #111 So,Minnesota QRZ |
richard
| | Posted on Monday, February 11, 2002 - 10:36 pm: |
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len get rid of the astic junk ! then put your house on its own grounding system ! most houses have thier elect on the water line !!! build a good ground for your system !!! your astic is splattering and thats why your having problems ! when in doubt ground everything ! any wire , pipe , conduit will resonate if its longer than 9ft . get rid of the omni ant ! go with your beam use two rotators for vert-horiz and you will be happy and so will most of your neighbors ! if they will let ya then give them a better ground also ! |
2tone11crom
| | Posted on Thursday, March 14, 2002 - 2:20 am: |
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IM planing to cophase 2 four element beams can I run two 50 ohm feedline to my radio and tee them at the radio instead at the antenna my reason is 105 foot tower Im thinking if one fails we can still use the other need some help want to get it right the first time I really dont what to climb that high thanks 2/tone |
409
| | Posted on Thursday, March 14, 2002 - 2:23 pm: |
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Horizontal tends to produce more TVI in some cases because your TV antenna is also polarized the same way. I have used both and the vertical tends to be a little less prone to generate TVI at close range. A lot of the time, the problem is in the Tv or its connecting antenna system,not the radio or antenna. |
bullet/151 southern Indiana
| | Posted on Friday, March 15, 2002 - 2:47 am: |
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2 tone, go with rg11 cable with the copper sheild
for your "co-phase harness". its 75ohms and will handle good power.you can then hook up your 50 ohm coax to it at the tee conector and run it to your base! system matched for 50 ohms.
sorry if you want a elaborate antenna you must do the things to make it right. 2-50 ohm feedlines going from stacked antennas and conecting with a tee conector to more 50 ohm coax to your base is not it... "you got to match 50 ohms" with your coax system as well, and your going to be around 25 ohms. |
2tone11crom
| | Posted on Saturday, March 16, 2002 - 1:08 am: |
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thanks bullet/151 your imput just save me a of time and mostly money rg 11 cable 75 ohms thats what we will do. spring is on its way 'your right its better to do it right the first time around 2tone muskegon mi |
Dx431
| | Posted on Sunday, March 17, 2002 - 9:56 pm: |
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Since we are on the subject, I have an A/V 140 MoonRaker Beam and am putting it on a tower, what I want to know is how high above the tower is it soppose to be??? I was told the tip of the verticle raticles should be 12" min. Is this correct? |
RCI2990
| | Posted on Monday, March 18, 2002 - 7:37 pm: |
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Keep the antenna "out of the tower". meaing keep it as far above the tower as you can. I have my moonraker 4s verticle tips of the elements about 3' above the tip top of the tower. it works good. |
Taz
| | Posted on Tuesday, March 19, 2002 - 2:27 pm: |
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i am getting my moonraker 4 here this weekend i hope!!!!! i am putting it on a 10 foot mast, would that be high enough? |
Taz
| | Posted on Tuesday, March 19, 2002 - 2:38 pm: |
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but its also on a 30 foot tower, hhaaha,
forgot to mention that part |
RCI2990
| | Posted on Tuesday, March 19, 2002 - 3:12 pm: |
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YUP!! You will like it believe me!!!! |
Taz
| | Posted on Tuesday, March 19, 2002 - 3:25 pm: |
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cool! |
RCI2990
| | Posted on Tuesday, March 19, 2002 - 7:10 pm: |
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Well ive had several sets of beams (PDL-2s, Maco Comet, m 103s, Supper scanner, Charles Gizmachy 5 elements)over the years and well, ive always gone right back to the trusty ol' moonraker 4s each and every time!! Now im on a set that ive had up almost 5 years and they are going strong. |
bruce
| | Posted on Tuesday, March 19, 2002 - 8:56 pm: |
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taz l'd like to see that antenna on my favort band 1750 meters |
Taz
| | Posted on Tuesday, March 19, 2002 - 10:29 pm: |
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do you mean 1750 mhz or 1750 meters? |
Dx431
| | Posted on Wednesday, March 20, 2002 - 10:16 am: |
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Ok, thanx.......hope to get them up this weekend.....god willing and the creek don't rise! lol  |
Dx431
| | Posted on Wednesday, March 20, 2002 - 10:23 am: |
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Hey Taz..when you get those beams up,swing 'em NE. look for me on 27.585 LSB.
431 Ne. |
bruce
| | Posted on Wednesday, March 20, 2002 - 10:41 am: |
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no meters 165 khz dare to be diffrent |
