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#1
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geir knutsen wrote: I would suggest that you get someone to calculate the antenna with NEC or similar to get the right lengths and resistive loss. Then build an prototype for 2m and 70cm and put it on eBay to check if there is any interest for the antenna. To reduce the size it might be an idea to think about using Parker tube fittings in some of the joints. 73 Geir I really appreciate the advice! What is "NEC"? I assume it is an antenna performance computer program? Are you saying build a dual band prototype of one for each band? What are "Parker tube fittings"? wrote in message oups.com... I really like to build things. I can weld even small material with a mig welder I have at home. You mentioned building a j pole. I thought of doing this myself. To be honest, I have always wanted to make something, (not necessarily an antenna) that I could sell for a few extra dollars on ebay or something. I wonder if a person could make any money building antennas and doing that? I am not wanting to get rich but I like building things and I could use some "pocket money". We just had our second shild born yesterday. It is my first son! I thought about making a j-pole out of stainless steel tubing. It seems this would be attractive because of it being rustproof and to me more "visably appealing" that a copper one after it become tarnished. But some people have told me there is more resistance in stainless than copper. SOmeone else told me it would not amount to much in ham use. Thought about building yagis too. The only problem would be figuring out how to ship an antenna where it would not cost much. |
#2
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Yes NEC is a antenna calculation program.
Try the Parker website and you will find the fittings I'm thinking about ( there is a similar type called swage lock) Here is an example of an dual band j-pole http://www.durm-online.de/jpole.htm I have seen several variations of this design, but can't find any of the links. Geir wrote in message oups.com... geir knutsen wrote: I would suggest that you get someone to calculate the antenna with NEC or similar to get the right lengths and resistive loss. Then build an prototype for 2m and 70cm and put it on eBay to check if there is any interest for the antenna. To reduce the size it might be an idea to think about using Parker tube fittings in some of the joints. 73 Geir I really appreciate the advice! What is "NEC"? I assume it is an antenna performance computer program? Are you saying build a dual band prototype of one for each band? What are "Parker tube fittings"? wrote in message oups.com... I really like to build things. I can weld even small material with a mig welder I have at home. You mentioned building a j pole. I thought of doing this myself. To be honest, I have always wanted to make something, (not necessarily an antenna) that I could sell for a few extra dollars on ebay or something. I wonder if a person could make any money building antennas and doing that? I am not wanting to get rich but I like building things and I could use some "pocket money". We just had our second shild born yesterday. It is my first son! I thought about making a j-pole out of stainless steel tubing. It seems this would be attractive because of it being rustproof and to me more "visably appealing" that a copper one after it become tarnished. But some people have told me there is more resistance in stainless than copper. SOmeone else told me it would not amount to much in ham use. Thought about building yagis too. The only problem would be figuring out how to ship an antenna where it would not cost much. |
#3
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How wxpensive is it? WOuld anyone be able to do the calculations for me?
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