| Author |
Message |
    
Skilletlicker
Intermediate Member
Username: Skilletlicker
Post Number: 232
Registered: 5-2002
| | Posted on Tuesday, July 05, 2005 - 3:04 pm: | 
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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 |
Moderator136
Moderator
Username: Moderator136
Post Number: 51
Registered: 4-2005
| | Posted on Tuesday, July 05, 2005 - 7:36 pm: |
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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
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Alleycat
Junior Member
Username: Alleycat
Post Number: 29
Registered: 3-2005
| | Posted on Wednesday, July 06, 2005 - 12:41 am: |
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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 |
Skilletlicker
Intermediate Member
Username: Skilletlicker
Post Number: 233
Registered: 5-2002
| | Posted on Wednesday, July 06, 2005 - 5:20 am: |
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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
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Bruce
Senior Member
Username: Bruce
Post Number: 2934
Registered: 9-2003
| | Posted on Wednesday, July 06, 2005 - 12:43 pm: |
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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. |
Alleycat
Junior Member
Username: Alleycat
Post Number: 30
Registered: 3-2005
| | Posted on Wednesday, July 06, 2005 - 2:22 pm: |
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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 |
Skilletlicker
Intermediate Member
Username: Skilletlicker
Post Number: 234
Registered: 5-2002
| | Posted on Wednesday, July 06, 2005 - 3:29 pm: |
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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
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Moderator136
Moderator
Username: Moderator136
Post Number: 52
Registered: 4-2005
| | Posted on Wednesday, July 06, 2005 - 7:28 pm: |
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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
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Tech808
Moderator
Username: Tech808
Post Number: 6263
Registered: 8-2002
| | Posted on Wednesday, July 06, 2005 - 7:36 pm: |
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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 
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Hollowpoint445
Advanced Member
Username: Hollowpoint445
Post Number: 507
Registered: 6-2004
| | Posted on Wednesday, July 06, 2005 - 9:25 pm: |
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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. |
Bigbob
Senior Member
Username: Bigbob
Post Number: 2029
Registered: 12-2001
| | Posted on Thursday, July 07, 2005 - 6:13 am: |
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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. |
Slugo4449
Junior Member
Username: Slugo4449
Post Number: 35
Registered: 7-2004
| | Posted on Thursday, July 07, 2005 - 9:10 pm: |
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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 |
