| Author |
Message |
    
Mr.B
| | Posted on Sunday, May 05, 2002 - 3:46 pm: | 
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Hi i want a beam and i was going to get a maco comet but my problem is about the rotor I don't want to spend 400 dollars on a rotor i was thinking maybe around 60 but i don't think they make any that powerfull and cheap can anyone help me? |
bruce
| | Posted on Monday, May 06, 2002 - 11:47 am: |
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i doubt you could buy a tv rotor for 60 bucks 30 years ago a tr44 rotor was close to 100 now its 300 as for used ..... na |
Md2020
| | Posted on Monday, May 06, 2002 - 6:53 pm: |
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Hi Mr.B. I just put up a PDL II this weeken. 60ft. in the air. I could have use a tv rotor.The beam only is 17lbs and 64ins.long.But I dont want no problems. I went to a yaesu G450a for 259.00 buck. TV rotors are 69.00 and up. |
Mr.B
| | Posted on Monday, May 06, 2002 - 8:25 pm: |
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Ya but i don't have that much to spend!! I don't know what to do i don't have the money for a big rotor I don't know if a Radio shack rotor that
Handles masts from 1-1/3 to 1-3/4 inches in diameter
Rotation time 360°: 65 (± 5) seconds (at 60Hz)
Rotation torque: 160 pounds per inch
Vertical load: 99 pounds maximum
Thrust bearing: Handles loads up to 250 pounds maximum
Gear ratio: 3100 (± 100) to 1
Wind load braking system: Up to 70mph
Power source: 120VAC, 62W, 60Hz, 0.52A
Motor: 18VAC (2.35A)
My question is if I thrust bearing it will it be able to turn a maco comet and not burn out??? |
bruce
| | Posted on Tuesday, May 07, 2002 - 4:57 am: |
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YEARS ago i ran one with a 4 elm 6 meter beam it worked fine but i don know if it's going to hold up for cb use give it a try |
bullet
| | Posted on Thursday, May 09, 2002 - 1:13 pm: |
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mr b
i have used a radio shack HD tv rotor for 2 years
now without a trust bearing to turn both a 20ft four element quad for 11 meter and a tv antenna with a 15 ft sch 40 mast.and have never had the first moment of trouble out of it. "and thats much more wind load/and weight than a comet is going to have".
i have 5 or 6 trust bearings in the garage with my ham 4 but i didnt feel compelled to change anything at that time.
but i took the tower and all down to repaint the tower and go deeper down in the ground as i plan to put back up 80ft of tower this time and a six element beam so 2 thrust bearings and the ham 4 will finally make it out of the garage.lol
of coarse a thrust bearing or two would take alot of stress off the rotor and is a great idea,i was just lazy at the time and wanted it up fast.
a bell rotor would be better,but you can make due with a good hd tv rotor/bearings/torque tube for a small beam like a comet or m103c,PDL2,y-quad ect.
one setup you might try is from towers neck on down:
sch 40+ mast/thrust bearing/torque tube/ 2nd
thrust bearing/rotor. this also places rotor as close to the ground as you want,for easier access
to rotor. |
bruce
| | Posted on Thursday, May 09, 2002 - 10:30 pm: |
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i used the alinace u100 and bearing VERY close to the rad shack and it worked fine on a hygain 4 elm 6 meter beam but i think bullet is right a small cb beam if you support the rotor right should be ok worst your out 60 bucks |
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