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Re: [TowerTalk] Rotor control line MOV's

To: Steven Katz <stevek@jmr.com>, "john@kk9a.com" <john@kk9a.com>, "towertalk@contesting.com" <towertalk@contesting.com>
Subject: Re: [TowerTalk] Rotor control line MOV's
From: James Gordon Beattie Jr <w2ttt@att.net>
Date: Thu, 2 Sep 2021 22:37:13 +0000
List-post: <mailto:towertalk@contesting.com>
Steve,
Sounds about right.   I will make up some and see how they perform.  As long as 
they don't mess up the primary function of the lead, this is a winner.
Hope that you are well!
73,
Gordon Beattie, W2TTT
201.314.6964
EM80jh

Get Outlook for Android<https://aka.ms/ghei36>
________________________________
From: TowerTalk <towertalk-bounces@contesting.com> on behalf of Steven Katz 
<stevek@jmr.com>
Sent: Thursday, September 2, 2021 1:06:54 PM
To: James Gordon Beattie Jr <w2ttt@att.net>; john@kk9a.com <john@kk9a.com>; 
towertalk@contesting.com <towertalk@contesting.com>
Subject: Re: [TowerTalk] Rotor control line MOV's

They appear to be V10H40P (Littelfuse P/N) MOVs or equivalent, which cost about 
$0.35/ea.   Capacitor value unknown, but I'd use .01uF/1kV like the Vishay 
75-562R5HKMS10RR or similar, which are about $0.70/ea.

-WB2WIK

-----Original Message-----
From: TowerTalk <towertalk-bounces@contesting.com> On Behalf Of James Gordon 
Beattie Jr
Sent: Thursday, September 2, 2021 9:45 AM
To: john@kk9a.com; towertalk@contesting.com
Subject: Re: [TowerTalk] Rotor control line MOV's

John,
>From the photos, each lead has an MOV and capacitor in parallel shunted to 
>ground.  The Array Solutions boxes are really nice and convenient, but in a 
>few hours I could fabricate that with a grounding buss bar,  NEMA box and some 
>stainless hardware.

What values would you recommend for the MOV and capacitor?

73,
Gordon Beattie, W2TTT
201.314.6964

Get Outlook for Android<https://aka.ms/ghei36> ________________________________
From: TowerTalk <towertalk-bounces@contesting.com> on behalf of john@kk9a.com 
<john@kk9a.com>
Sent: Wednesday, August 25, 2021 8:46:58 AM
To: towertalk@contesting.com <towertalk@contesting.com>
Subject: Re: [TowerTalk] Rotor control line MOV's

I have been using these for years:
https://www.arraysolutions.com/surge-and-rf-protection/as-12sp

John KK9A


R. David Eagle kb8nnu wrote:

Im looking to add some surge protection on my rotor control wires and was 
wondering if anyone has any input as to which ones work the best? Source and 
part numbers would be appreciated!
Thanks,
DaveKB8NNU

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