RV-List Digest Archive

Sat 02/14/09


Total Messages Posted: 2



Today's Message Index:
----------------------
 
     1. 11:41 AM - Re: Roatan (mr.gsun@gmail.com)
     2. 12:05 PM - Weird Problem (J Riffel)
 
 
 


Message 1


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    Time: 11:41:09 AM PST US
    Subject: Re: Roatan
    From: mr.gsun@gmail.com
    Ron, Sounds Like A Fantastic Trip. That's the place with great scubadiving, right? Greg On Fri, Feb 13, 2009 at 11:15 AM, ronald vandervort <ronvan@q.com> wrote: > > Am inviting another airplane or two to tag along with us on a flight to > Roatan Honduras. My aircraft is an RV-6, 180 HP with constant > speed.....cruise about 178 mph. Hope to go during the first week of March. > Want to be back by the 11th. My passenger is a registered nurse. The last > week of March is a consideration also. Ron Vandervort, 14,000 total time, > aircraft has 1300 hrs which I built in 98. Phone: 360-620-3366 or > ronvanv@q.com. Would leave from Mc Allen TX > >


    Message 2


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    Time: 12:05:54 PM PST US
    Subject: Weird Problem
    From: J Riffel <riffeljl@gmail.com>
    I just fixed a weird problem and thought I'd share it in case anyone else has been going nuts with something similar. I had a radio shop (Nolan Avionics in Durant,Ok ' which I can no longer recommend) build my wiring harness. My com2 (Icom A200) worked fine ' but com1 (GNS430) didn't. After a lot of work I finally figured out that some wires had been forgotten on the harness. So I contorted my 60 yr old creeky body upside down, over the spar and into the foot well, taped my trifocals on upside down so I could see, practiced my Navy cursing and got them installed. Now the weird part. When I keyed the mic on com1, my EIS amp gauge showed negative amps. The sensor is between the alternator and the battery ' so technically that "can't happen". Also the altitude servo would chatter and go into a climb when I transmitted on com1. Com2 was fine. I thought about a short ' but the fuses were fine, and I thought a short would cause a high amp reading instead of a negative one. I thought about the alternator/voltage regulator ' but ruled that out after calling Plane Pow er. I ruled out the amps sensor and the EIS because the readings were fine ' except when I keyed the mic on com1. I was going nuts (and that's a short trip for me)! Last week I finally called Grand Rapids to see if they had any ideas why their sensor would go negative ' they'd been very helpful in the past. "Sandy" was equally perplexed and handed me off to "Greg", the owner. He listened politely and we discussed things. Finally he said he thought it wa s radio interference. He was familiar with TruTrak autopilots and thought my altitude servo problem was radio interference too. He suggested some noise filters from Radio Shack. I bought 3 different types but liked the 273-069 (about $3 for a package of 2) the best. I put a couple of them on both antenna leads at the antenna end. Worked like a charm.




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