[TowerTalk] rotor @ 200m distance

[Máximo EA1DDO_HK1H]

Hi all,


Actually there are other options based on to install a remote controller on the mast/tower, then control remotely by Ethernet, Wifi, FibreOptic, etc.


One of those options is the K3NG system: https://blog.radioartisan.com/yaesu-rotator-computer-serial-interface/

This system has a Master-Slave configuration for remote control over LAN (Ethernet, Wifi, FibreOptic).


One more complete and plug and play option is the 4O3A solution:

http://www.4o3a.com/products/station-automation/rotator-genius/


Both are based in a remote controller, installed in the tower and connected directly to the antenna rotator. Then a control device in the shack, connected by ethernet in any flavour (Ethernet, Wifi, FibreOptic, etc.)


73, Maximo


________________________________
De: TowerTalk <towertalk-bounces at contesting.com> en nombre de Jim Thomson <jim.thom at telus.net>
Enviado: sábado, 14 de octubre de 2017 19:26
Para: towertalk at contesting.com
Asunto: [TowerTalk] rotor @ 200m distance

Date: Sat, 14 Oct 2017 10:08:38 -0700
From: Jim Brown <jim at audiosystemsgroup.com>
To: towertalk at contesting.com
Subject: Re: [TowerTalk] rotor @ 200m distance

On 10/14/2017 9:44 AM, Filipe Lopes wrote:
> My question is regarding the rotor, what kind of cable or how should one
> rotate the rotor at such distance? I guess the voltage drop is quite high,
> meaning the rotor will turn very very slowly or even not turn at all.

<Ohm's Law is your friend, but Yaesu's tech data is not. :) They don't
give you a maximum permitted resistance so you must compute it. I have a
350 ft run on my Yaesu rotator. I had to figure conductor resistance for
their maximum recommended cable length based on its conductor size, then
do Ohm's Law with a wire table to know what wire size to use. One
important piece of information -- study the schematic of whatever
rototor you are using. With the Yaesu, two conductors run the motor, the
other three sense the position of a simple potentiometer that tells
direction. Only the motor pair is sensitive to resistance. I ended up
using #14 "house wire" for the motor pair and #18 for the potentiometer.

73, Jim K9YC

## heres another thought.   Use the tower as the return.  That would work if a DC
motor was used.   Works on cars, and it would work on a tower.  But in his case, the
tower is a long way away, so u still have a  V drop  from shack to base of tower.

Jim  VE7RF




_______________________________________________



_______________________________________________
TowerTalk mailing list
TowerTalk at contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
TowerTalk Info Page - Contesting<http://lists.contesting.com/mailman/listinfo/towertalk>
lists.contesting.com
TowerTalk is for discussion of tower and HF antenna construction topics. TT members have lots of helpful information and are happy to share it.