For splicing two different size wires together, or multiple wires paralleled to
a larger gauge wire, visit your local marine supplier and look for " step down
butt splices ".They come in many sizes and configurations and are even
available with heat shrink tubing and or adhesive. They are designed to be
weatherproof and in a high vibration environment. Just be sure you properly
crimp them.73,Gary K9GS
-------- Original message --------From: Herschel Hall <r2owner@gmail.com> Date:
3/24/25 10:15 AM (GMT-05:00) To: Jorge Diez - CX6VM <cx6vm.jorge@gmail.com>
Cc: jim@audiosystemsgroup.com, towertalk@contesting.com Subject: Re:
[TowerTalk] Prosistel rotor connectors source in USA For he 220’ run to my Tic
Ring I use 7 conductor 18 ga copper undergroundsprinkler wire I bought at
Menards. 2 pairs for the 2 motors & 3 for thepot. Runs to base of tower & then
stranded 18 ga up the tower. Tower is aHDX-555, so need strand going up.73
HerschelWA9KIAOn Mon, Mar 24, 2025 at 7:41 AM Jorge Diez - CX6VM
<cx6vm.jorge@gmail.com>wrote:> Hi Jim>> my cable runs are 650 fts the longest,
300 fts the other two runs>> I was using 2.00 mm2 and 1.5 mm2 with no problem>>
73,> Jorge>> El lun, 24 mar 2025 a las 2:21, Jim Brown
(<jim@audiosystemsgroup.com>)> escribió:>> > On 3/23/2025 5:30 PM, Jorge Diez
(CX6VM-CW5W) wrote:> > > Manual says to use no less than 0.75 mm2 wires. Don’t
talk about the> > length> >> > In the Yaesu rotators I use, big copper is
needed only to run the motor;> > position is sensed by the position of a
potentiometer (variable> > resistor) physically linked to the rotating side, so
small copper works> > just fine.> >> > I'm looking at the user manual for the
PST-61 and two other models, and> > it does the same thing. Wires 1 and 2 drive
the 12VDC motor, wires 3, 4,> > and 5 are connected to the potentiometer. They
specify 1 sq mm for the> > motor, 0.5 sq mm for the other three. Those numbers
seem to be based on> > current-carrying capacity, not allowable IR drop.> >> >
Obviously incomplete information if you're buying cable for a long run.> >> > A
question for you, Jorge. How long is your rotator cable? If it's> > short, you
only need to double up the wires on the motor, so that's one> > pair for each
wire. You've got two pairs (4 wires) left for the pot, and> > only need three.>
>> > A trick I've used when trying to fit stranded wire into a contact that> >
is too small for it is to simply remove enough strands right at the> >
connector to make it fit. For you doubling up conductors, strip them a> > bit
long, cut one shorter than the other, solder it to the longer one,> > and
solder that longer one to the connector, using short pieces of heat> > shrink
to insulate the bare wires as needed.> >> > 73, Jim K9YC> >> >> >> >>> --> 73,>
Jorge> CX6VM/CW5W> _______________________________________________>>>>
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