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06-27-2020, 06:12 PM
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#1
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Senior Member
Newmar Owners Club Spartan Chassis
Join Date: Mar 2012
Posts: 871
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Key down on 40 M causes slide to activate
I have been operating SSB on 20 & 40 meters for some time with great results with my hustler mobile antenna on the top of the ladder. (when parked at the campsite) Today I went into CW mode key down (100 watts) on 40 to check the SWR.
To my surprise, when I keyed down, my slide lock opening annunciator came on and said the slide locks were opening. (very scary to me and my YL) Obvious RF overload. As I stopped transmitting immediately, so the slide didn't move.
Has anyone else experienced anything similar?
__________________
Craig and Susan
Morgan Hill, CA 2007 Newmar Kountry Star 3910 towing a 1998 Ford Explorer. RVing since gas was 58 cents a gallon. Amateur Radio Operator (W6ADV) since 1962.
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06-27-2020, 06:27 PM
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#2
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Senior Member
Join Date: Jul 2000
Location: Chicago Metro
Posts: 3,963
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lol...well, look at it this way. you found a 'Plan B' to open your slides.
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Rich, Ham Radio, Sport Pilot
Retired 9-1-1 Admin.
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06-28-2020, 09:04 AM
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#3
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Senior Member
Thor Owners Club
Join Date: Feb 2013
Posts: 109
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Quote:
Originally Posted by Craig36
I have been operating SSB on 20 & 40 meters for some time with great results with my hustler mobile antenna on the top of the ladder. (when parked at the campsite) Today I went into CW mode key down (100 watts) on 40 to check the SWR.
To my surprise, when I keyed down, my slide lock opening annunciator came on and said the slide locks were opening. (very scary to me and my YL) Obvious RF overload. As I stopped transmitting immediately, so the slide didn't move.
Has anyone else experienced anything similar?
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Not exactly that, but for a while keying up did cause my backup camera to come on.  I was able to fix it by rerouting a cable and putting a couple chokes on a feed line. But that's the problem with RF -- it's a sneaky little rascal that can show up where you don't want it, and not so much where you do.
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06-28-2020, 09:08 AM
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#4
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Moderator Emeritus
Ford Super Duty Owner
Join Date: Aug 2000
Location: Bryan, TX when not traveling.
Posts: 22,948
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I was going to suggest adding a couple of ferrite chokes to the control cables for the slide controls.
Ken
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Amateur Radio Operator (KE5DFR)|No Longer Full-Time! - 2023 Cougar 22MLS toted by 2022 F150, 3.5L EcoBoost Tow Max FX4 Lariat Travel with one Standard Schnauzer and one small Timneh African Gray Parrot, retired mechanical engineer
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06-28-2020, 12:06 PM
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#5
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Senior Member
Country Coach Owners Club
Join Date: Dec 2010
Posts: 7,799
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Haven't had a slide problem but I have turned on the air conditioner fan
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Don
2002 Country Coach Intrigue
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07-03-2020, 12:10 PM
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#6
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Senior Member
Outdoors RV Owners Club
Join Date: Dec 2014
Location: Nowhere, now here. Freedom!
Posts: 4,602
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I'm happy with the products I have bought from these folks. They are happy to help you find the right way to mitigate your RFI issues.
https://palomar-engineers.com/
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ORV 19B Full Timer from '15 to '20, '14 Ram 2500 Diesel and a GSD. Vancouver, WA
de K7NOL 146.52Mhz Safety? (CLICK ME!)
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07-12-2020, 07:19 AM
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#7
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Senior Member
Join Date: Nov 2010
Location: Maplesville, AL - Home Base
Posts: 158
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I operate only digital via Verizon Jetpack, OpenSpot3 and HT's. I had to switch everything from VHF to UHF because my Norcold circuit board didn't like VHF regardless of how low transmit power I used. At least UHF works.
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Ed
KM4STL
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07-12-2020, 09:54 AM
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#8
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Senior Member
Join Date: Dec 2016
Posts: 466
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My kitchen GFI would click off if I was near it while keying up my HT on 2 meters.
GFI failed a few years later. New on woks fine.
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2015 Pleasure-Way Plateau XL Wide Body
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08-17-2020, 10:08 AM
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#9
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Senior Member
Join Date: Jan 2000
Posts: 396
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Two possible solutions...
1. Add an RFI Choke at the input to the antenna and possibly a common mode choke at the radio. I think that should cure the problem for all of the issues.
2. If not, a type 31 ferrite at the wiring to the slide and other electronics being compromised.
Likely the shielding on the coax is acting as an antenna and a lot of rf is coming back down rather than being sent out into the air. An RF Choke should be great and they are pretty simple to build. Same with a Common Mode choke that would keep RF that comes down the coax from entering the shack. It's possible a common mode might solve the problem by itself..
__________________
Bill Splaine, Meridian, ID WA7WS
2022 Grand Design Imagine XLS 22RBE, 2023 MB Sprinter 144" 3500 aka BlauMax (aka GreatWhite), Amateur Radio, Woodcarving and more
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Linear Mode
