[TowerTalk] Rotor Cabling Query

[Steven Katz]

The only time I've experienced a "stuck" T2X is when the rotator is at or nearly at its stop point (for me, due South) so "rocking" it out of lock is impossible.



Once that happened exactly once, I learned to never stop it at due South again!  😊   Lucky for me, there's virtually nothing due south of here, anyway.



-----Original Message-----
From: TowerTalk <towertalk-bounces at contesting.com> On Behalf Of Robert Harmon
Sent: Monday, April 5, 2021 10:41 AM
To: TowerTalk <towertalk at contesting.com>
Subject: Re: [TowerTalk] Rotor Cabling Query



I see what you mean.   Oh well,   so much for that idea .......................





Bob

K6UJ









> On Apr 5, 2021, at 10:20 AM, Steven Katz <stevek at jmr.com<mailto:stevek at jmr.com>> wrote:

>

> How will it rotate at all without the brake power engaged?   That's what "releases" the brake.   Unpowered, it's engaged.

>

> -----Original Message-----

> From: TowerTalk <towertalk-bounces at contesting.com<mailto:towertalk-bounces at contesting.com>> On Behalf Of Robert

> Harmon

> Sent: Monday, April 5, 2021 10:18 AM

> To: TowerTalk <towertalk at contesting.com<mailto:towertalk at contesting.com>>

> Subject: Re: [TowerTalk] Rotor Cabling Query

>

> So will the HyGain Tailtwister hold securely with no creeping if I disconnect  the brake wire ?   I have had the typical stuck brake scenario with my old Tail Twisters in the past and I like the

> idea of not using the brake circuit if possible. I always let it coast to a stop anyway.    I have a new TailTwister replacement going up in a couple of weeks.

>

>

> Bob

> K6UJ

>

>

>

>> On Apr 5, 2021, at 9:56 AM, john at kk9a.com<mailto:john at kk9a.com> wrote:

>>

>> You can save a lot of heavy gauge wire by using a rotator without a brake. A brake adds controller complexity, it sometimes sticks and it requires two extra conductors. I believe only Hy-Gain uses brakes. I have not owned a rotator with a brake in decades and even my 60 ft boom antennas to not creep in the wind.

>>

>> John KK9A

>>

>> Lux, Jim wrote:

>>

>>

>> The brake draws 5A @ 24V according to the manual. You probably need

>> 20V or so minimum, so for 1400 ft (out and back), to keep the voltage

>> drop at 6V from the usual 26V transformer, the resistance has to be

>> less than about an ohm.  AWG10 is 1 ohm/1000 ft.  So you'd need what, AWG 8?

>> That's a pretty substantial expense.

>>

>> The manual calls for AWG14 for 300 ft. You're running more than twice

>> that, so to keep the resistance the same, you need to go down 3

>> gauges

>> (3 gauges is twice the area/half the resistance). They call out AWG16

>> for most of the other wires than the common and brake. (The motor

>> draws

>> 2.25A)

>>

>>

>> Someone probably makes a suitable interface (Green Heron?).

>>

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