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#11
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rotor cable voltage drop
Man you gotta help me here....
BTW on VHF/UHF you probably want some serious hardline for the RF link if you are looking at a 500' cable run. I'm just an old retired grunt electrician Thanks Jeff wrote in message ... I'm installing a 60ft tower about 400ft from my house for uhf/vhf. I'm planning to use a Channel Master rotor which I haven't purchased yet. I've buried 1"pvc conduit to tower and planning the wire pull for the antenna & satellite coax plus the rotor cable. From my research 3c/22ga. wire will control all C M rotors. Since I don't know the power requirements yet of the I use all Ham-3 and Ham-4 type rotators which need 8 conductors. Only two of those (which run the motor) need to be larger size. For long runs to the tower I use Romex #14 for the motor wires and CAT5 for the other 6. Cheaper than buying "heavy-duty" rotator cable. BTW on VHF/UHF you probably want some serious hardline for the RF link if you are looking at a 500' cable run. Tor N4OGW |
#12
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rotor cable voltage drop
Nick
I'm not concerned with the wire pull, I'll come out of the ground to a pull box at the 1/2 way point and the 1"C will be large enough, with plenty of soap I should be able to pull it by hand. But can you expound on your concerns with the interaction effects. Thanks Jeff "Nick" wrote in message ... "Jeff Dieterle" wrote in message ... Hi Nick, Not sure where you going with the larger conduit and what type of losses. From my limited knowledge, conduit fill is a function of the rated wire ampacity and the resultant I-sqr'd-R loss if the wire is pushed to rated ampacity, which shouldn't be an issue on the coax, and a later poster replied with the correct rotor wire size. If you talking about signal loss on RG6 over that distance I've had that cable laying on the ground to the tower location for a couple of years and get a strong signal, physical damage to the exposed wire is the problem. I assumed the coax shielding, properly grounded would take care of problems running in the same conduit with Sat. TV and Rotor wiring Please reply if you have more insight on this. Thanks Jeff Hi Jeff, I may have read it wrong, but I understand that the run from the shack to the tower is some 400 feet, and the conduit is one inch diameter... This to take a feeder ( presumably co-ax) and a rotator control cable and possibly a separate co-ax for the satellite ? I would have thought the co-ax would have to be quite a large diameter to minimise losses, and this with the other one (or two ?) cables down a 1" conduit that long just struck me as completely impossible and possibly undesirable from interaction effects ? Nick |
#13
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rotor cable voltage drop
"Jeff Dieterle" wrote in message ... Nick I'm not concerned with the wire pull, I'll come out of the ground to a pull box at the 1/2 way point and the 1"C will be large enough, with plenty of soap I should be able to pull it by hand. But can you expound on your concerns with the interaction effects. Thanks Jeff I really don't know what, if any, there might be - bad swr would be worse than good of course but perhaps that will be sorted at the antenna end anyway - inductive coupling perhaps ? All the best - looking forward to the update with results ! Nick |
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