Avionics-List Digest Archive

Wed 01/16/08


Total Messages Posted: 6



Today's Message Index:
----------------------
 
     1. 06:10 AM - IFR GPS requirements ()
     2. 07:06 AM - Re: VHF Transmitting Noise (Don Morrisey)
     3. 07:31 AM - Re: VHF Transmitting Noise (Garlick, Bill (W.D.))
     4. 01:34 PM - Re: VHF Transmitting Noise (Noel Loveys)
     5. 01:48 PM - Re: VHF Transmitting Noise (Noel Loveys)
     6. 02:05 PM - Re: VHF Transmitting Noise (Don Morrisey)
 
 
 


Message 1


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    Time: 06:10:54 AM PST US
    From: <bakerocb@cox.net>
    Subject: IFR GPS requirements
    1/16/2008 Hello Bill, Avoid that poor soul -- he has not been around long enough or cared enough to learn that type certificated aircraft and amateur built experimental aircraft are treated very differently in the FAA's paperwork system. What he has described in the way of paperwork approval just simply does not apply to your airplane. Here is a quote from the signature section of the FAA Form 337: "I certify that the repair and/or alteration made to the unit(s) identified in item 5 above and described on the reverse or attachments hereto have been made in accordance with the requirements of Part 43 of the U.S. Federal Aviation Regulations and that the information furnished herein is true and correct to the best of my knowledge." And here is a quote from FAR Part 43.1: "(b) This part does not apply to any aircraft for which the FAA has issued an experimental certificate, unless the FAA has previously issued a different kind of airworthiness certificate for that aircraft." Since part 43 does not apply to amateur built aircraft issued a Special Airworthiness Certificate in the Experimental Category for the purpose of operating amateur-built aircraft (FAR 21.191 (g)) how can one properly comply with the signature certification requirement on the FAA Form 337? Several years ago a poster described his mistaken attempt to comply with all FAA type certificated regulatory and advisory circular requirements for the IFR GPS installation in his amateur built experimental airplane. He even flew a test flight with a terrified FAA inspector who spent the entire flight frantically looking out the window in fear of a mid air collision. The entire effort was wasted because no FAA agency or procedure for the approval existed -- just initial erroneous assumptions by uninformed FAA employees. 'OC' Says: "The best investment we can make is the effort to gather and understand knowledge." ----------------------------------------- From: "William Gill" <wgill10(at)comcast.net>Subject: IFR GPS requirements Hello All, I have a Bendix-King KLN 94 GPS (IFR certified unit) in an RV-7. During discussions with an FAA inspector, I was told that I was not allowed to use this unit for IFR use until I completed a 337 form with a field approval, and completed the required test flight. I was not aware that the experimental ships had to jump through the same hoops as the Type Certificated aircraft. Can this possibly be true? I welcome all input on this subject. Bill RV-7 Lee's Summit, MO


    Message 2


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    Time: 07:06:43 AM PST US
    From: Don Morrisey <donmorrisey@hotmail.com>
    Subject: VHF Transmitting Noise
    Hi Bill, you may want to look into this product: http://miracleantenna.com/ smoothie.htm I have no personal experience with it, but it was mentioned on the yahoo ja biru engine list in regard to engine noise. It does have the capacitor Noe l mentions. If you do use it I would be curious to know your results. Don...www.donsbushcaddy.comDon Morrisey's Skunkworks Subject: Avionics-List: VHF Transmitting NoiseDate: Tue, 15 Jan 2008 08:40: 04 +0000From: bgarlick@ford.comTo: avionics-list@matronics.com Hi I'd appreciate some comments or advice from avionics installers who half-un derstand what they're doing? (My limits are that I need to follow manufactu rers' installation instructions and wiring diagrams to the letter; and if s omething doesn't quite work I'm at a complete loss!...Although if any advic e was something like connecting a xxx ohm resistor in parallel in a particu lar circuit, I could manage to cope with that). I have just installed an ICOM IC-A200 transceiver coupled with a PS Enginee ring PM501 Intercom in a newly built Vans RV7, and when I press the PTT swi tch I get a lot of noise feeding-back into the earphones as I'm talking=85 The Air Traffic Controllers say they're reading me "fives", and the noise d oesn't occur when Receiving or when using the voice-activated intercom. Th e noise isn't in time with the engine, but is constant whilst transmitting and sounds like wind blowing across the microphone. Any ideas about what could be wrong? Thanks BillG _________________________________________________________________ Get the power of Windows + Web with the new Windows Live. http://www.windowslive.com?ocid=TXT_TAGHM_Wave2_powerofwindows_012008


    Message 3


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    Time: 07:31:38 AM PST US
    Subject: VHF Transmitting Noise
    From: "Garlick, Bill (W.D.)" <bgarlick@ford.com>
    Thanks Don, I was able access the website (after inserting www) and immediately spotted the choke that Noel suggested sitting in the middle of the circuit board picture. I might give it a try and will let you know how it works...it's worth the relatively high cost if it gets rid of that damn noise! (...I've found out already I can get a Toroid choke from a local electronics store for GBP2.26 = USD4.63) BillG - RV7 ________________________________ From: owner-avionics-list-server@matronics.com [mailto:owner-avionics-list-server@matronics.com] On Behalf Of Don Morrisey Sent: Wednesday, January 16, 2008 3:04 PM Subject: RE: Avionics-List: VHF Transmitting Noise Hi Bill, you may want to look into this product: http://miracleantenna.com/smoothie.htm I have no personal experience with it, but it was mentioned on the yahoo jabiru engine list in regard to engine noise. It does have the capacitor Noel mentions. If you do use it I would be curious to know your results. Don... www.donsbushcaddy.com <http://www.donsbushcaddy.com/> Don Morrisey's Skunkworks ________________________________ Subject: Avionics-List: VHF Transmitting Noise From: bgarlick@ford.com Hi I'd appreciate some comments or advice from avionics installers who half-understand what they're doing? (My limits are that I need to follow manufacturers' installation instructions and wiring diagrams to the letter; and if something doesn't quite work I'm at a complete loss!...Although if any advice was something like connecting a xxx ohm resistor in parallel in a particular circuit, I could manage to cope with that). I have just installed an ICOM IC-A200 transceiver coupled with a PS Engineering PM501 Intercom in a newly built Vans RV7, and when I press the PTT switch I get a lot of noise feeding-back into the earphones as I'm talking... The Air Traffic Controllers say they're reading me "fives", and the noise doesn't occur when Receiving or when using the voice-activated intercom. The noise isn't in time with the engine, but is constant whilst transmitting and sounds like wind blowing across the microphone. Any ideas about what could be wrong? Thanks BillG target=_blank>http://www.matronics.com/Navigator?Avionics-List p://forums.matronics.com blank>http://www.matronics.com/contribution ________________________________ Get the power of Windows + Web with the new Windows Live. Get it now! <http://www.windowslive.com?ocid=TXT_TAGHM_Wave2_powerofwindows_012008>


    Message 4


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    Time: 01:34:23 PM PST US
    From: "Noel Loveys" <noelloveys@yahoo.ca>
    Subject: VHF Transmitting Noise
    I went to check the site but got a 404 error then I tried to get to the root directory and got a password block. The unit, a choke, is a coil with a capacitor usually in the centre of the coil. It is wired in series with the power line. A capacitor can be used to filter a different kind of noise if it is just connected between the power line and the ground.... Capacitors don't conduct DC current. A capacitor set up the second way is generally used to smooth out DC voltage in power supplies. Noel From: owner-avionics-list-server@matronics.com [mailto:owner-avionics-list-server@matronics.com] On Behalf Of Don Morrisey Sent: Wednesday, January 16, 2008 11:34 AM Subject: RE: Avionics-List: VHF Transmitting Noise Hi Bill, you may want to look into this product: http://miracleantenna.com/smoothie.htm I have no personal experience with it, but it was mentioned on the yahoo jabiru engine list in regard to engine noise. It does have the capacitor Noel mentions. If you do use it I would be curious to know your results. Don... www.donsbushcaddy.com <http://www.donsbushcaddy.com/> Don Morrisey's Skunkworks _____ Subject: Avionics-List: VHF Transmitting Noise From: bgarlick@ford.com Hi I'd appreciate some comments or advice from avionics installers who half-understand what they're doing? (My limits are that I need to follow manufacturers' installation instructions and wiring diagrams to the letter; and if something doesn't quite work I'm at a complete loss!...Although if any advice was something like connecting a xxx ohm resistor in parallel in a particular circuit, I could manage to cope with that). I have just installed an ICOM IC-A200 transceiver coupled with a PS Engineering PM501 Intercom in a newly built Vans RV7, and when I press the PTT switch I get a lot of noise feeding-back into the earphones as I'm talking. The Air Traffic Controllers say they're reading me "fives", and the noise doesn't occur when Receiving or when using the voice-activated intercom. The noise isn't in time with the engine, but is constant whilst transmitting and sounds like wind blowing across the microphone. Any ideas about what could be wrong? Thanks BillG target=_blank>http://www.matronics.com/Navigator?Avionics-List p://forums.matronics.com blank>http://www.matronics.com/contribution _____ Get the power of Windows + Web with the new Windows Live. Get it now! <http://www.windowslive.com?ocid=TXT_TAGHM_Wave2_powerofwindows_012008>


    Message 5


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    Time: 01:48:24 PM PST US
    From: "Noel Loveys" <noelloveys@yahoo.ca>
    Subject: VHF Transmitting Noise
    Thanks for the key to get into the site. That unit appears to be an excellent choice. It will choke out a number of different frequencies, I'm sure, and it will help with voltage fluctuations. A good choice It looks heavy enough to install across the feed to your avionics buss if your plane is wired that way. Noel From: owner-avionics-list-server@matronics.com [mailto:owner-avionics-list-server@matronics.com] On Behalf Of Garlick, Bill (W.D.) Sent: Wednesday, January 16, 2008 11:58 AM Subject: RE: Avionics-List: VHF Transmitting Noise Thanks Don, I was able access the website (after inserting www) and immediately spotted the choke that Noel suggested sitting in the middle of the circuit board picture. I might give it a try and will let you know how it works.it's worth the relatively high cost if it gets rid of that damn noise! (.I've found out already I can get a Toroid choke from a local electronics store for GBP2.26 = USD4.63) BillG - RV7 _____ From: owner-avionics-list-server@matronics.com [mailto:owner-avionics-list-server@matronics.com] On Behalf Of Don Morrisey Sent: Wednesday, January 16, 2008 3:04 PM Subject: RE: Avionics-List: VHF Transmitting Noise Hi Bill, you may want to look into this product: http://miracleantenna.com/smoothie.htm I have no personal experience with it, but it was mentioned on the yahoo jabiru engine list in regard to engine noise. It does have the capacitor Noel mentions. If you do use it I would be curious to know your results. Don... www.donsbushcaddy.com <http://www.donsbushcaddy.com/> Don Morrisey's Skunkworks _____ Subject: Avionics-List: VHF Transmitting Noise From: bgarlick@ford.com Hi I'd appreciate some comments or advice from avionics installers who half-understand what they're doing? (My limits are that I need to follow manufacturers' installation instructions and wiring diagrams to the letter; and if something doesn't quite work I'm at a complete loss!...Although if any advice was something like connecting a xxx ohm resistor in parallel in a particular circuit, I could manage to cope with that). I have just installed an ICOM IC-A200 transceiver coupled with a PS Engineering PM501 Intercom in a newly built Vans RV7, and when I press the PTT switch I get a lot of noise feeding-back into the earphones as I'm talking. The Air Traffic Controllers say they're reading me "fives", and the noise doesn't occur when Receiving or when using the voice-activated intercom. The noise isn't in time with the engine, but is constant whilst transmitting and sounds like wind blowing across the microphone. Any ideas about what could be wrong? Thanks BillG target=_blank>http://www.matronics.com/Navigator?Avionics-List p://forums.matronics.com blank>http://www.matronics.com/contribution _____ Get the power of Windows + Web with the new Windows Live. Get it now! <http://www.windowslive.com?ocid=TXT_TAGHM_Wave2_powerofwindows_012008> http://www.matronics.com/contribution


    Message 6


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    Time: 02:05:19 PM PST US
    From: Don Morrisey <donmorrisey@hotmail.com>
    Subject: VHF Transmitting Noise
    Hi Noel, I had the link wrong. Here is the correct link: http://www.miracleantenna.com/smoothie/htm Donwww.donsbushcaddy.comDon Morrisey's Skunkworks From: noelloveys@yahoo.caTo: avionics-list@matronics.comSubject: RE: Avioni cs-List: VHF Transmitting NoiseDate: Wed, 16 Jan 2008 17:56:35 -0330 I went to check the site but got a 404 error then I tried to get to the roo t directory and got a password block. The unit, a choke, is a coil with a capacitor usually in the centre of the coil. It is wired in series with the power line. A capacitor can be used t o filter a different kind of noise if it is just connected between the powe r line and the ground.... Capacitors don=92t conduct DC current. A capaci tor set up the second way is generally used to smooth out DC voltage in pow er supplies. Noel _________________________________________________________________ Share life as it happens with the new Windows Live. http://www.windowslive.com/share.html?ocid=TXT_TAGHM_Wave2_sharelife_0120 08




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