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Old January 5th 09, 04:02 AM posted to rec.radio.shortwave
Telamon Telamon is offline
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First recorded activity by RadioBanter: Jul 2006
Posts: 4,494
Default Suggested roof antenna for Sony portable

In article ,
Dave wrote:

Telamon wrote:


You'll need a balun to transition from the random wire to the cable.
This will also enable you to put the whole mess at DC ground which will
help protect the radio.


Right, protect it against static electricity.

Make sure the RG6 is properly grounded at the point where it enters
your house.


For RF this is not necessary. If you do ground it outside the house use
a separate ground. Better would be to make one ground radial under the
single wire antenna and ground the coax to a ground rod.

http://www.buxcomm.com/catalog/index...nfo&cPath=8&pr
oducts_id=802


No specifications but probably OK.

Connect the antenna to the red terminal and the ground radial under it
to the black terminal.


You don't understand how brutal lightning is in most places. A Type F
grounding block costs a couple bucks; an 8 foot rod is $8; a clamp is a
couple bucks (I trust he can scrounge-up some #10 copper wire); why skimp?


If lightning is a problem then ground the coax but use a ground separate
from the antenna ground so noise currents from the radio plugged into
the mains has some isolation from the antenna circuit.

If the antenna ground is a wire on the ground under the aerial then the
coax could be attached to a ground rod.

--
Telamon
Ventura, California