receiver antenna placement

[Bill Glaze]

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 <mailto: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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