Re: Connecting Transceivers in Vehicles - Change

Posted by Bill - K6WLM on Mar 17, 2010; 4:55pm
URL: http://elecraft.85.s1.nabble.com/Re-Connecting-Transceivers-in-Vehicles-Change-tp4751547.html

FYI
 
Paul, sorry but I disagree.
 
 
For HF mobile installation, GM and others recommend that the radio NOT be grounded in the cabin.  Both battery leads should be fused at the battery.  The reason for the negitive side fuse  is in the event that the battery ground lead to the engine block should go open or have a high resistance there will be very high current trying to find ground when you start the engine.  Starter motor current can be in the hundreds of amps.  You do NOT want that amount of current flowing thru your rig!
 
73,  Bill - K6WLM
 
<home-run to the battery posts.  If the negative  fuse blows and the positive
<fuse remains closed -- and *if* the radio chassis is common to negative
<power with grounded connectors (e.g., SO-239) via a ground return through
<the vehicle chassis, then the coax braid and other supplemental grounded
<leads on the radio chassis will carry the full rig current.

<Seems like in all cases where the rig chassis is common to the negative
<power lead, the negative lead wiring should go un-fused at or very close to
<the negative battery post.

<Paul, W9AC



     
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