Garage door interference

[Elecraft mailing list]

A while ago someone posted about putting a capacitor across the garage door opener to keep EMI out.

Well, I just successfully opened mine using my KPA500 on 40M.

Can someone repost? I really don’t want to search back through the dozens of K4 posts!

Tom W4KX

Sent from my iPad
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[ke9uw]

I did. Put a .1uF ceramic at the door opener across the connection of the wires going to the button by the kitchen door that operates the garage door. Assuming your opener is like mine...

Get Outlook for iOS<https://aka.ms/o0ukef>

________________________________
From: [hidden email] on behalf of Tom Doligalski via Elecraft <[hidden email]>
Sent: Monday, March 25, 2019 7:18 PM
To: [hidden email]
Subject: [Elecraft] Garage door interference


A while ago someone posted about putting a capacitor across the garage door opener to keep EMI out.

Well, I just successfully opened mine using my KPA500 on 40M.

Can someone repost? I really don’t want to search back through the dozens of K4 posts!

Tom W4KX

Sent from my iPad
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[Thorpe, Jeffrey]

Details on just what you did to make this happen would be very interesting...

Jeff - KG7HDZ

> On Mar 25, 2019, at 5:26 PM, hawley, charles j jr <[hidden email]> wrote:
>
> I did. Put a .1uF ceramic at the door opener across the connection of the wires going to the button by the kitchen door that operates the garage door. Assuming your opener is like mine...
>
> Get Outlook for iOS<https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Faka.ms%2Fo0ukef&amp;data=02%7C01%7CJthorpe%40liberty.edu%7Cf908f1c4a4cd43840a0708d6b181a23f%7Cbaf8218eb3024465a9934a39c97251b2%7C0%7C0%7C636891567665347902&amp;sdata=EgTmI1r2cBsZFvJ7REwpiFIcv31eVaXi6yHOTaSEvDE%3D&amp;reserved=0>
>
> ________________________________
> From: [hidden email] on behalf of Tom Doligalski via Elecraft <[hidden email]>
> Sent: Monday, March 25, 2019 7:18 PM
> To: [hidden email]
> Subject: [Elecraft] Garage door interference
>
>
> A while ago someone posted about putting a capacitor across the garage door opener to keep EMI out.
>
> Well, I just successfully opened mine using my KPA500 on 40M.
>
> Can someone repost? I really don’t want to search back through the dozens of K4 posts!
>
> Tom W4KX
>
> Sent from my iPad
> ______________________________________________________________
> Elecraft mailing list
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[K9MA]

All I did when mine had this problem is to wrap each wire entering the
opener around a ferrite core a few times. That included the power cord,
the wires to the switches, etc. I think there were 3 cores: one for the
power cord, one for the switch wires, and one the light light sensor.
Generally, all the wires which run together can go through a single
core. No capacitors were necessary. All but the power cord a small
enough you can get a lot of turns on a small split core.

73,

Scott K9MA


--
Scott  K9MA

[hidden email]

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[Elecraft mailing list]

Last time I had issues with the garage door having a mind of it’s own when i was on the air, I resolved it by simply placing a few mix 31 ferrites on the control wires. Couple at the door opener box on the ceiling and a couple more by the wired transmitter on the garage wall. That cured it, without having to open the box and so any soldering.

Jim / W6JHB

> On   Monday, Mar 25, 2019, at  Monday, 5:25 PM, hawley, charles j jr <[hidden email]> wrote:
>
> I did. Put a .1uF ceramic at the door opener across the connection of the wires going to the button by the kitchen door that operates the garage door. Assuming your opener is like mine...
>
> Get Outlook for iOS<https://aka.ms/o0ukef>
>
> ________________________________
> From: [hidden email] on behalf of Tom Doligalski via Elecraft <[hidden email]>
> Sent: Monday, March 25, 2019 7:18 PM
> To: [hidden email]
> Subject: [Elecraft] Garage door interference
>
>
> A while ago someone posted about putting a capacitor across the garage door opener to keep EMI out.
>
> Well, I just successfully opened mine using my KPA500 on 40M.
>
> Can someone repost? I really don’t want to search back through the dozens of K4 posts!
>
> Tom W4KX
>
> Sent from my iPad
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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>
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James Bennett
[hidden email]



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