| Author |
Message |
    
1861
Intermediate Member
Username: 1861
Post Number: 408
Registered: 2-2004
| | Posted on Monday, December 12, 2005 - 2:12 pm: | 
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I,M GOING TO MOUNT A M 103 USING A HEAVY DUTY TV ANTENNA ROTATOR , I FIGURE THE LONGER THE MAST FROM ROTATOR TO ANTENNA THE HARDER IT WILL BE ON THE ROTATOR . MY QUESTION , HOW SHORT SHOULD THIS PIECE OF MAST BE ? I WAS THINKING 2 OR 3' BUT NOT SURE . |
Airplane1
Advanced Member
Username: Airplane1
Post Number: 653
Registered: 5-2004
| | Posted on Tuesday, December 13, 2005 - 8:32 am: |
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If your running the 103 flat you can put rotor right above the rotor, like just a few inches.
AP |
Road_warrior
Senior Member
Username: Road_warrior
Post Number: 1053
Registered: 7-2004
| | Posted on Tuesday, December 13, 2005 - 10:18 am: |
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Rotors are not made to hold the whole weight
of any antenna/mast. Smaller antennas you may get away with it for awhile.
Good Luck! |
Thehobo
Junior Member
Username: Thehobo
Post Number: 38
Registered: 2-2004
| | Posted on Tuesday, December 13, 2005 - 1:07 pm: |
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1861, most rotors have listed in there spec sheet just how much weight they will take on the rotor itself!! i believe that if your just going to use a 3 eleament beam, the heavy duty tv type rotor will carry it!! thats if your going to use it on the flat side, then it only takes about 6 inches clearance for this set up?? how ever, if your going to use your beam on the veritical side, you need about a 10 foot piece of pipe as to get the eleaments out of the rotor interferance, and that wood require a bell rotor or one of the heavier types of others?? the wind load wood be pretty hard on the tv type rotor as its not made for that type of use!! hope this helps some??
thehobo
274150 am
monitor ch. |
Road_warrior
Senior Member
Username: Road_warrior
Post Number: 1054
Registered: 7-2004
| | Posted on Tuesday, December 13, 2005 - 7:35 pm: |
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Yes, it will carry it, but, only on borrowed
time. What i'm trying to say is a rotor
should be used with a Thrust Bearing to keep
weight off the rotor. And the rotor should
have more wind load strength than the
wind load of the antenna. At least Horz mounting won't catch as much wind as Vert. mounting.
JIM/PA/CEF 375 |
1861
Intermediate Member
Username: 1861
Post Number: 414
Registered: 2-2004
| | Posted on Wednesday, December 14, 2005 - 9:13 pm: |
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THANKS , LOOKS LIKE MAYBE I,LL RE THINK PUTTING UP A BEAM . ATLEAST FOR NOW |
Airplane1
Advanced Member
Username: Airplane1
Post Number: 654
Registered: 5-2004
| | Posted on Thursday, December 15, 2005 - 8:30 am: |
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boy I need to wake up, I ment to say if you mount 103 flat you can put the rotor just a few inches below the antenna. The wind load of rotor needs to be as much as or more than the antenna wind load. if you mount it vertical then you will need a bigger rotor than a tv ant rotor unless you get a thrust bearing like RW said. |
Unit199
Intermediate Member
Username: Unit199
Post Number: 212
Registered: 8-2003
| | Posted on Tuesday, December 20, 2005 - 5:30 am: |
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I ran a M-103 on a heavy duty tv rotor for 2 years with no thrust bearing and a three foot pipe above rotor and never had any problems. I gave the rotor and control to a friend and he has a 10 element 2 meter beam on it now and it is still working.
HARVE |
