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Re: [TowerTalk] G-2800DXA lightning damage

To: eedwards@oppd.com, towertalk@contesting.com
Subject: Re: [TowerTalk] G-2800DXA lightning damage
From: Gene Smar <ersmar@verizon.net>
Date: Thu, 04 Sep 2014 15:01:18 -0500 (CDT)
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
Ed:
 
     I'm using the Polyphasor models on the control line inside a steel box 
that also has my SPG plate outside the shack.  In addition, I wound the control 
cable at the top of the tower, just before it connects to the rotator contact 
strip, and at the bottom of the tower into a four-turn solenoid using a piece 
of 2 inch PVC as a form.  You can see the bottom solenoid at  
http://tinyurl.com/nshybh9 , just below and to the left of the steel box.  If I 
had to do it over again I'd wind double the number of turns to increase the 
inductance of each coil.  
 
 
73 de
Gene Smar  AD3F
 


On 09/04/14, EDWARDS, EDDIE J wrote:

Regarding the issue of lightning damage to control boxes, I'm wondering if you 
guys are using surge protectors on your rotor lines or not? 

Polyphaser makes one and probably some others do as well. 
http://www.dxengineering.com/parts/ppr-is-rct 


73, de ed -K0iL

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Subject: TowerTalk Digest, Vol 141, Issue 12

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Today's Topics:

1. Re: G-2800DXA lightning damage (Edward Sawyer)
2. Re: [Bulk] Re: G-2800DXA lightning damage (Grant Saviers)


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Message: 1
Date: Wed, 3 Sep 2014 18:08:16 -0400
From: "Edward Sawyer" SawyerEd@Earthlink.net>
To: <towertalk@contesting.com>
Subject: Re: [TowerTalk] G-2800DXA lightning damage
Message-ID: <000301cfc7c3$902b2310$b0816930$@Earthlink.net>
Content-Type: text/plain; charset="us-ascii"

To my knowledge, Yaesu does not repair the rotor or the control box. They
will sell you the control box but its not cheap AT ALL! They will also sell
the stand alone rotor without the control box. 



To properly debug the problem, it is always handy to have an extra Yaesu
control box so that it can be swapped out to see if the problem is the box
or the cable/rotor. I have actually found the rotor itself to be darned
reliable. But the boxes are incredibly fragile to all kinds of stuff. I
have a grave yard of a number of boxes and have a winter project in mind to
try and make one good or maybe two good boxes out of them so I have spares.
Its not a matter of IF you need to replace a Yaesu rotor control box - it's
a matter of when.



Ed N1UR



------------------------------

Message: 2
Date: Wed, 03 Sep 2014 20:12:47 -0700
From: Grant Saviers grants2@pacbell.net>
To: towertalk@contesting.com
Subject: Re: [TowerTalk] [Bulk] Re: G-2800DXA lightning damage
Message-ID: <5407D8AF.5000104@pacbell.net>
Content-Type: text/plain; charset=windows-1252; format=flowed

Having been into the 2800 control box for mechanical repairs, I 
understand why Yaesu doesn't repair them. It's a dog's breakfast of 
interconnections among 3 pcbs. The schematics are just as bad, 
spaghetti signal flows. The servo control to drive the pointer drive 
motor is complex. The gear train behind the pointer is not for the 
fumble fingered and the o-ring used to drive the pointer is just this 
side of comical. The whole thing has to come apart for replacement when 
they stretch or dry rot. My advice is to buy a Green Heron if the 
control box is bad.

The rotator mechanics OTOH seem pretty well made and designed (except 
for getting the 500 ohm pot precisely aligned).

Grant KZ1W


On 9/3/2014 3:08 PM, Edward Sawyer wrote:
> To my knowledge, Yaesu does not repair the rotor or the control box. They
> will sell you the control box but its not cheap AT ALL! They will also sell
> the stand alone rotor without the control box.
>
> 
>
> To properly debug the problem, it is always handy to have an extra Yaesu
> control box so that it can be swapped out to see if the problem is the box
> or the cable/rotor. I have actually found the rotor itself to be darned
> reliable. But the boxes are incredibly fragile to all kinds of stuff. I
> have a grave yard of a number of boxes and have a winter project in mind to
> try and make one good or maybe two good boxes out of them so I have spares.
> Its not a matter of IF you need to replace a Yaesu rotor control box - it's
> a matter of when.
>
> 
>
> Ed N1UR
>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>



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