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Re: [TowerTalk] Protecting Control Lines

To: "'Mickey Baker'" <>, <>
Subject: Re: [TowerTalk] Protecting Control Lines
From: "Perry - K4PWO" <>
Date: Fri, 8 Oct 2010 10:27:13 -0500
List-post: <">>
If you look at the trip curves, a 600 volt @ 60 amp event takes about 5 ms.
to trip the device.  I think that transient devices with a standard low
current fuse would work better.
See for K5FD's SP12 surge protector as an example.
See for the circuit.

I use one and its well built.  I couldn't build it much cheaper than he gets
for it.

73 de Perry - K4PWO

-----Original Message-----
[] On Behalf Of Mickey Baker
Sent: Thursday, October 07, 2010 11:14 PM
Subject: [TowerTalk] Protecting Control Lines

Are the devices sold for "lightning protection" of rotator and control lines
all simply gap+MOV protectors? Perhaps GDT?

Is one better than another? I respect your opinion, but do you have a
technical, non-anecdotal reason to believe which is better?

They seem damn expensive for what they are, so I'm considering building one.

Has anyone built a protection block?

I found these resettable fuses/MOVs while shopping to build one:

Anyone used these?

(I don't have any relationship with any component manufacturer - this isn't
a plug.)


Mickey N4MB

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