Forums :: Resources :: Features :: Photo Gallery :: Vintage Radio Shows :: Archives :: Books
Support This Site: The Souvenir Shop :: Contributors :: Advertise


It is currently May Mon 20, 2013 1:48 pm


All times are UTC [ DST ]



Post New Topic Post Reply  [ 8 posts ] 
Author Message
 Post subject: Antenna For Shop
PostPosted: Apr Wed 27, 2011 1:13 am 
Member

Joined: Mar Sun 29, 2009 3:34 am
Posts: 520
Location: chancellor al.
I have a simple dipole up about 25 ft. with about 75 feet per leg. I plan to use 300 ohm twinlead (hopefully not the Chinese stuff I saw in RS) and conn. a ferrite loopstick across the twinlead inside shop. I think a secondary (may have one already) of lower imped. would be ok to conn to radios on bench.
I would welcome any comments pro or con on this project.
I do plan to have a lightning arrestor of some type on lead in.

Harold


Top
 Profile  
 
 Post subject:
PostPosted: Apr Wed 27, 2011 6:10 pm 
Member

Joined: Jan Thu 01, 1970 1:00 am
Posts: 2112
Location: Olympia WA USA
I don't think you really need a loopstick antenna on the feed wire.

I use a 75' antenna ( in an "V" shape to make it an omnidirectional) and earth ground to a patch panel in my shop.

I can then come off the binding posts for the connections to the radio.

For radios with a loop on the back I found hooking a coil of wire to make an inductive coupling works just great.

_________________
FrankB
WB7ELC
Member: TCA
"I know that all that is wrong with it is one little part".


Top
 Profile  
 
 Post subject:
PostPosted: Apr Thu 28, 2011 2:10 pm 
Moderator
User avatar

Joined: Jan Thu 01, 1970 1:00 am
Posts: 5867
Location: Evanston, IL
Agree. Just use the antenna lead in and ground for your connections. Loopstick not needed.

Chuck

_________________
Chuck Schwark,
The Philco Repair Bench
Schematic Photocopy Service
www.philcorepairbench.com


Top
 Profile  
 
 Post subject:
PostPosted: May Sat 28, 2011 1:00 am 
Member

Joined: Jan Thu 01, 1970 1:00 am
Posts: 3188
Location: Harviell MO USA 63945 (12 miles S of Poplar Bluff)
Quote:
I use a 75' antenna ( in an "V" shape to make it an omnidirectional) and earth ground to a patch panel in my shop.


Of course that "V" must be in the horizontal plane to make it more omnidirectional. A "V" in the vertical plane does nothing for that.

_________________
Dean, Electronics Curmudgeon
Contributing editor emeritus in Poptronics magazine, R.I.P.


Top
 Profile  
 
 Post subject: Re: Antenna For Shop
PostPosted: Aug Sun 07, 2011 12:43 pm 
Member

Joined: Aug Sat 29, 2009 12:06 pm
Posts: 294
Location: Milford, CT
If this is for the AM band then don't even bother with the dipole. At 150 feet it's no where reasonant for the AM band. It will work but why go through al the trouble? If you are using it to test radios, any lenght of wire strung outdoors is fine.


Top
 Profile  
 
 Post subject: Re: Antenna For Shop
PostPosted: Aug Wed 10, 2011 3:12 pm 
Member

Joined: Aug Mon 18, 2008 3:17 pm
Posts: 736
Location: Dallas Tx.
Use the loopstick. It will increase signal strength especially on low power stations but the main advantage is it will reduce interference from shop tools, chargers, and lighting.


Top
 Profile  
 
 Post subject: Re: Antenna For Shop
PostPosted: Aug Wed 10, 2011 7:26 pm 
Member

Joined: May Tue 30, 2006 4:46 pm
Posts: 4792
Location: Santa Rosa, CA
Quote:
Use the loopstick. It will increase signal strength especially on low power stations but the main advantage is it will reduce interference from shop tools, chargers, and lighting


Sorry, I am mystified.

Reducing interference would require reducing signal strength, unless you have found a way to tune the loopstick to the offending interference.

In my opinion, the loopstick is not needed.

Rich


Top
 Profile  
 
 Post subject: Re: Antenna For Shop
PostPosted: Aug Wed 10, 2011 7:44 pm 
Member

Joined: Aug Mon 18, 2008 3:17 pm
Posts: 736
Location: Dallas Tx.
The loopstick Q drops off dramatically above and below the band it is designed for.
It will not reduce actual BCB noise but will reduce everything else. They are especially good in reducing fluorescent interference.


Top
 Profile  
 
Post New Topic Post Reply  [ 8 posts ]  Moderator: Chuck Schwark

All times are UTC [ DST ]


Who is online

Users browsing this forum: No registered users and 1 guest



Search for:
Jump to:  










Privacy Policy :: Powered by phpBB