receiver antenna placement

[Bill Glaze]

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

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.f3a.us/pipermail/nsrca-discussion/attachments/20040225/1a2a2c18/attachment.html