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Any issues with VHF interference?

 
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rv10rob(at)gmail.com
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PostPosted: Thu Mar 16, 2017 7:41 pm    Post subject: Any issues with VHF interference? Reply with quote

I have an issue where my GS needle moves erratically when I'm flying an ILS in wet clouds or rain. I'm guessing that means I have a static problem (though the localizer and comm radios are fine). Anyone have a similar issue and/or recommendations? I heard of a few people installing static wicks, but it doesn't seem to be too common. Thanks..
-Rob


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Rob Kochman
RV-10 Flying since March 2011
Woodinville, WA
http://kochman.net/N819K


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jdriggs49(at)MSN.COM
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PostPosted: Thu Mar 16, 2017 8:15 pm    Post subject: Any issues with VHF interference? Reply with quote

You could be getting "bleed over" from either lightning or more likely static being generated in the clouds from the movement of the moisture (raindrops).
When I was in grade school I made a static electricity generator for a science project using simulated raindrops to generate the electrical charge. Basically just have continuously dropping water droplets thru two brass rings. It would eventually buildup enough charge to jump a 3/4" gap. Very high voltage but not much amps. It sure would make a lot of RFI noise however.
If static wicks aren't helping then I'd consult with a radio shop or two. You may need some frequency filters.

Sent from my iPad

On Mar 16, 2017, at 10:48 PM, Rob Kochman <rv10rob(at)gmail.com (rv10rob(at)gmail.com)> wrote:


Quote:
I have an issue where my GS needle moves erratically when I'm flying an ILS in wet clouds or rain. I'm guessing that means I have a static problem (though the localizer and comm radios are fine). Anyone have a similar issue and/or recommendations? I heard of a few people installing static wicks, but it doesn't seem to be too common. Thanks...


-Rob




--
Rob Kochman
RV-10 Flying since March 2011
Woodinville, WA
http://kochman.net/N819K





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Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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flying-nut(at)cfl.rr.com
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PostPosted: Fri Mar 17, 2017 3:56 am    Post subject: Any issues with VHF interference? Reply with quote

Been a long time since I heard of that problem!  Solutions typically point to grounding problems ..... coax connections or antenna installation .... or both. 
Linn

On 3/16/2017 11:36 PM, Rob Kochman wrote:

Quote:
I have an issue where my GS needle moves erratically when I'm flying an ILS in wet clouds or rain. I'm guessing that means I have a static problem (though the localizer and comm radios are fine). Anyone have a similar issue and/or recommendations? I heard of a few people installing static wicks, but it doesn't seem to be too common. Thanks...


-Rob




--
Rob Kochman
RV-10 Flying since March 2011
Woodinville, WA
http://kochman.net/N819K



No virus found in this message.
Checked by AVG - www.avg.com
Date: 03/16/17


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Kelly McMullen



Joined: 16 Apr 2008
Posts: 1040
Location: Sun Lakes AZ

PostPosted: Fri Mar 17, 2017 6:19 am    Post subject: Any issues with VHF interference? Reply with quote

I would definitely explore the grounding/shielding integrity before trying static wicks. My Mooney has a cat whisker VOR antenna on top of the tail, with no static wicks, flying almost identical approach speeds to the RV-10, and has never had a glideslope or VOR problem in any precip. While I generally fly approaches for real at 90-100 kts, I have practiced upwards of 150 kts without any receiver problems.
Haven't had my RV in enough precip to find such an issue..haven't done any real IFR in it yet, but my two Archer wingtip VOR antennas seem to be performing very well.

-sent from the I-droid implanted in my forearm

On Fri, Mar 17, 2017 at 4:54 AM, Linn Walters <flying-nut(at)cfl.rr.com (flying-nut(at)cfl.rr.com)> wrote:
Quote:
Been a long time since I heard of that problem!  Solutions typically point to grounding problems ..... coax connections or antenna installation .... or both. 
Linn

On 3/16/2017 11:36 PM, Rob Kochman wrote:

Quote:
I have an issue where my GS needle moves erratically when I'm flying an ILS in wet clouds or rain. I'm guessing that means I have a static problem (though the localizer and comm radios are fine). Anyone have a similar issue and/or recommendations? I heard of a few people installing static wicks, but it doesn't seem to be too common. Thanks...


-Rob




--
Rob Kochman
RV-10 Flying since March 2011
Woodinville, WA
http://kochman.net/N819K



No virus found in this message.
Checked by AVG - www.avg.com
Date: 03/16/17




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Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RV10-List

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Kelly McMullen
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