receiver antenna placement

[John Ferrell]

Naw..... it is antique modulation....
John Ferrell    
http://DixieNC.US

  ----- Original Message ----- 
  From: Bill Glaze 
  To: discussion at nsrca.org 
  Sent: Wednesday, February 25, 2004 4:42 PM
  Subject: Re: receiver antenna placement


  Nah.............It means amplitude modulation.................you've probably never heard of it before.  It was first used in Walkie Talkies by Fred Flinstone and Barney Rubble.
  Bill G.

  Gray E Fowler wrote:


    AM?  what happens ? Do you accidentally receive talk radio?



    Gray Fowler
    Principal Chemical Engineer
    Composites Engineering 



         Bill Glaze <billglaze at triad.rr.com> 
          Sent by: discussion-request at nsrca.org 
          02/25/2004 01:29 PM 
          Please respond to discussion 

                 
                  To:        discussion at nsrca.org 
                  cc:         
                  Subject:        Re: receiver antenna placement 



    Earl:
    I find that extremely interesting.  The only radio I've had to run a bonding wire with was my first one, a Babcock 3 channel ca. 1954.  They wanted everything bonded, from the rudder control wire, rudder/throttle exscapements, servo case, etc.
    up to and including the engine.  Every piece of metal on the airplane, including the landing gear.  What a pain!  It was, of course, AM.

    Bill Glaze

    EHaury at aol.com wrote: 
    Wayne 
      
    I've no experience with the full carbon fuse - antenna issue. However, a few years ago I experienced all sorts of range / glitching problems in an airplane that had metallic paint, metal cables and other potential points of metal - metal contacts (landing gear, landing gear door mechanisms, etc.) Running the antenna through a wing helped a bunch, as it moved the antenna away from noise generators. The real fix was to wire all metal objects together with a "ground wire" that was connected to the negative battery lead. Antenna then worked fine inside the fuse. All this was with an AM receiver on 6-meters. 
      
    A similar experience occurred with a different airplane that had a small fuselage and a lot of servo leads near a good portion of the antenna, range was nonexistent until moving the antenna to the wing. In this case the receiver was single conversion FM on 6-meters. 
      
    My conclusions were that the metallic paint is not a problem, metal to metal generated noise is (at lease with AM), and antenna - servo lead proximity can be. 
      
    I've not had any problems with dual-conversion FM on 6-meters with the antenna inside or outside the fuse, although I maintain a couple of inches separation between servo leads - cables and the antenna. 
      
    Current flights with the Partner haven't demonstrated any issues with the antenna inside the Kevlar rear of the fuse (as expected), although I've flown head on trimming stuff that has put the carbon front of the fuse between the antennae. 
      
    Earl 

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