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Old March 17th 08, 01:25 AM posted to rec.radio.shortwave
dave dave is offline
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First recorded activity by RadioBanter: Jan 2008
Posts: 341
Default Ground Wire Length?

msg wrote:
Telamon wrote:

In article ,
"Burr" wrote:


"dave" wrote in message
...

garthpdm wrote:

Hi,

I am wondering what limitations are on the length of the ground wire
lead from the transformer/balun to the ground rod? Thanks,

Garth

There is no requirement to to ground the BalUn (UnUn) directly. The
antenna lead (coaxial cable outer conductor) must be grounded at the
point where it enters the building. That is where the main ground
should be.



This is wrong. You do not want the AC power supply return to be your
RF ground. There is a lot noise on the power ground. You want a ground
under the antenna ideally and one that is not used for any other purpose.


Indeed, that is the point I was trying to make in my earlier post.

Michael


Who said anything about AC power? I'm assuming we're using batteries;
so what? Code specifies that the lead be grounded where it enters the
building. If you're getting noise from your grounds they aren't very
good grounds.