Copper Talk » Ask The Tech » Antennas » Balun « Previous Next »

Author Message
Top of pagePrevious messageNext messageBottom of page Link to this message

Skilletlicker
Intermediate Member
Username: Skilletlicker

Post Number: 232
Registered: 5-2002


Posted on Tuesday, July 05, 2005 - 3:04 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

could anyone tell me where i could find a balun to make a dipole antenna ,isearched in copper but couldn,tfind any thing
the skilletlicker
Top of pagePrevious messageNext messageBottom of page Link to this message

Moderator136
Moderator
Username: Moderator136

Post Number: 51
Registered: 4-2005
Posted on Tuesday, July 05, 2005 - 7:36 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Skilletlicker Im shur Copper dose not sell these!
But what are you looking for? 1 to 1 balun or 4 to one balun?

Lot of ham outlet stores sell these! Or you can wind your own balun.


Moderator136
CEF136
kc0svc
Top of pagePrevious messageNext messageBottom of page Link to this message

Alleycat
Junior Member
Username: Alleycat

Post Number: 29
Registered: 3-2005
Posted on Wednesday, July 06, 2005 - 12:41 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

If you want a choke balun to help stop current from running along the outside of the shielding in the coax just wrap approx. 8 turns of the coax around a 6" long 4" dia. piece of thin wall PVC. Wrap the turns next to each other like threads on a screw and then use tape or nylon ties to hold everything together. This can be done with the coax you are using for feed line to the antenna. Leave a few inches loose at one end to attach right to the antenna and the other end goes down to the radio. The closer the balun is to the antenna the better. Some people use a 2 Liter Coke bottle but UV rays may dry out the plastic over time and the bottle may fall apart. The PVC will last longer. If you have a piece of 3" or 5" dia. PVC go ahead and use it. The specs. on these things seem to be very forgiving. Drill a hole in it near the top so you can use a nylon tie or hook to support the weight of the balun and rest of the coax. This way the connector at the antenna is not holding all of the weight. If you don't have enough extra coat in the feed line you can make one out of new coax and hook it up in line between the feed line and feed point on the antenna with the correct connectors on each end of the choke balun.
Alleycat, KI4KHT
Top of pagePrevious messageNext messageBottom of page Link to this message

Skilletlicker
Intermediate Member
Username: Skilletlicker

Post Number: 233
Registered: 5-2002


Posted on Wednesday, July 06, 2005 - 5:20 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

i guess it would be a one to one ,i was tkink about making one for the 2 meter band when i pass the test
thanks the skilletlicker
Top of pagePrevious messageNext messageBottom of page Link to this message

Bruce
Senior Member
Username: Bruce

Post Number: 2934
Registered: 9-2003
Posted on Wednesday, July 06, 2005 - 12:43 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

I have made several for 80-6 meters and the simple coil of coax works very well. Another kind used ferite beads sliped over the coax but it cost far more than a few feet of rg-8.
Top of pagePrevious messageNext messageBottom of page Link to this message

Alleycat
Junior Member
Username: Alleycat

Post Number: 30
Registered: 3-2005
Posted on Wednesday, July 06, 2005 - 2:22 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

The 1:1 Choke Balun I wrote of above is more for 11M band give or take. For 6M what is suggested is smaller, 5 turns using approx. 6 ft. of coax. The length of coax is not critical. It seems that the number of turns is more important than the length of coax. For 2M band you might only need 4 turns. If you go to the MFJ Enterprises web site and download a manual for one of thier 2M Yagi antennas they usually tell you how to make a Choke Balun to use with that antenna at that frequency.

Alleycat, KI4KHT
Top of pagePrevious messageNext messageBottom of page Link to this message

Skilletlicker
Intermediate Member
Username: Skilletlicker

Post Number: 234
Registered: 5-2002


Posted on Wednesday, July 06, 2005 - 3:29 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

what i wanted todo was to make a dipole antenna for the two meter band if i pass the test
i thought i would need a balun to connect the coax to the antenna
the skilletlicker
Top of pagePrevious messageNext messageBottom of page Link to this message

Moderator136
Moderator
Username: Moderator136

Post Number: 52
Registered: 4-2005
Posted on Wednesday, July 06, 2005 - 7:28 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Skilletlicker,

Check out the link below,

A90-00008 Anttron 2-MB-PLUS Base Antenna
$ 39.99

Or check out Tech808's Review on the 2-MB-PLUS Base Antenna.

2-MB-PLUS Base Antenna Review

Moderator136
CEF136
kc0svc

Top of pagePrevious messageNext messageBottom of page Link to this message

Tech808
Moderator
Username: Tech808

Post Number: 6263
Registered: 8-2002


Posted on Wednesday, July 06, 2005 - 7:36 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Skilletlicker,

For $39.99 you just cannot go wrong with the Quality and Performance of the Anttron 2-MB-PLUS Base Antenna or the Anttron 2/6M GP Base Antenna at $49.99.

Lon
Tech808
CEF808
N9OSN

Top of pagePrevious messageNext messageBottom of page Link to this message

Hollowpoint445
Advanced Member
Username: Hollowpoint445

Post Number: 507
Registered: 6-2004
Posted on Wednesday, July 06, 2005 - 9:25 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

I made a 2 meter 1/4 wave ground plane with an SO-239 and a couple of coat hangers. If you really wanted to use copper wire I'd suggest using a couple 2' scraps of romex.

Wind a small coil of coax to decouple feedline current and you've got a great antenna for almost nothing.
Top of pagePrevious messageNext messageBottom of page Link to this message

Bigbob
Senior Member
Username: Bigbob

Post Number: 2029
Registered: 12-2001
Posted on Thursday, July 07, 2005 - 6:13 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Or you could really get fancy and make it from alum. tubing and make a gamma match with a so-239 2 dif. dia. aluminum tubing and some polyethylene sheet or tubing for the gamma dielectric,more complicated but a challenge and a real sense of accomplishment,or this is bs and you do what they say and you'll talk sooner.
Top of pagePrevious messageNext messageBottom of page Link to this message

Slugo4449
Junior Member
Username: Slugo4449

Post Number: 35
Registered: 7-2004
Posted on Thursday, July 07, 2005 - 9:10 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Skilletlicker:
If you are buying a balun for 2 meters make sure that the balun is made for those frequencies. I assume that you are going to use a dipole for SSB transmission on 2 meters. That and CW are the only modes that you would use a horizontal antenna for(a dipole). I would think if you want to work repeaters that you should have a vertical. I like to make J-Poles. I have made them out of copper pipe (about 10 bucks in parts) and also out of TV twin lead. Just do a search for "j-pole" using a search engine on the net.
Good luck on your amateur radio endevor!
CU
Marty
KG6QKJ

Add Your Message Here
Post:
Username: Posting Information:
This is a private posting area. Only registered users and moderators may post messages here.
Password:
Options: Enable HTML code in message
Automatically activate URLs in message
Action: