[TenTec] Eagle problem?

[Jim Brown]

It is not about a connection to the EARTH.  It is not about a second 
floor shack. It has nothing to do with circuit breakers. It IS simply 
that every cable shield MUST go to DIRECTLY TO THE CHASSIS.

All that other stuff is bogus ham lore and wandering in the dark.

73, Jim K9YC

On 5/14/2014 2:56 PM, Stuart Rohre wrote:
> Some Yaecomwoods do suffer from RF entering the rig.
>
> MOST ANY rig will if you have a bad shield connection on coax jumper, 
> or have rig too close to the antenna, (second floor shack), and there 
> are many other rig and feedline issues to rule out in any RFI case.
>
> Rule of thumb:  Power all equipment from same circuit breaker of the 
> house.  That ensures AC grounds will not be coming from widely 
> different locations.  IF you have to use a long ground wire for 
> lightning protection ground on the station (like from second floor 
> shack), consider that it could act as an "antenna" for pick up of RF 
> from the real antenna. You may need tuned radials, or a radial for 
> each favorite band.
>
> You could always examine the quality of the grounding of the mike 
> cable shield.  Some older mike cords had just a multi-strand wire 
> wrapped in one direction and not a hatch pattern wire shield. Some 
> aluminum foil shields don't make a good low impedance connection by 
> clamping. (Connections that can't be soldered are suspect).
>
> You can do a step by step analysis of grounding, by starting at the 
> mike element and measure the resistance by ohm meter, of shield 
> connection to plug pin/ shell.  Use a magnifier to examine connections 
> on inside of radio at mike.  Check case to mike jack shell if that type.
>
> Some radios have a thru bolt to provide a "ground" terminal on back of 
> set.  Make sure this bolt if present, grounds tightly to the chassis.
>
> Same could be said for any stud grounds on external tuner, etc.