Suggested roof antenna for Sony portable
 

bw wrote:
Now have a 7600GR, works well with the roll up clipped on the whip.
However, most of the time I seem to have a lot of local noise, and I'm in a
shallow valley.
I have an old TV mast on the roof and some nice RG-6 that was left over from
the satellite install.
The old TV antenna was damaged by ice and only the mast is left, about 30
feet above ground.
There is also a wood post about 20 feet high located 80 feet from the house,
it would be pretty easy to string a long wire from the TV mast to the post.
Then attach the wire to the coax, then coax into the house and into the
external port of the Sony.

What would be a decent coupling for the wire to the coax. I'd also like to
ground the coax so that my house noise is minimal.
Ideas?



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

http://www.buxcomm.com/catalog/index...ducts_ id=802

Suggested roof antenna for Sony portable
 

In article ,
Dave wrote:

bw wrote:
Now have a 7600GR, works well with the roll up clipped on the whip.
However, most of the time I seem to have a lot of local noise, and I'm in a
shallow valley.
I have an old TV mast on the roof and some nice RG-6 that was left over
from
the satellite install.
The old TV antenna was damaged by ice and only the mast is left, about 30
feet above ground.
There is also a wood post about 20 feet high located 80 feet from the
house,
it would be pretty easy to string a long wire from the TV mast to the post.
Then attach the wire to the coax, then coax into the house and into the
external port of the Sony.

What would be a decent coupling for the wire to the coax. I'd also like to
ground the coax so that my house noise is minimal.
Ideas?



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.php?main_page=product_info&cPath=8&products_ id=802

No specifications but probably OK.

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

--
Telamon
Ventura, California

Suggested roof antenna for Sony portable
 

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.php?main_page=product_info&cPath=8&products_ 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?

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

Suggested roof antenna for Sony portable
 

Telamon wrote:
In article ,
Dave wrote:


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.


The black terminal should connect to the grounded mast. Otherwise,
there are established procedures, as stated in the National Electrical Code.

http://www.dbsinstall.com/DIY/Grounding-2.asp