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

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

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