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#1
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A HAM friend of mine gave me a balun nine to ten years ago. I just
don't remember which one it was. I remember him saying that he was giving me that particular balun in thinking that I would get my ticket and eventually be transmitting on it. I'm thinking it is a 4:1 Any help please. :-) |
#2
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On 7 ene, 09:27, Gregg wrote:
A HAM friend of mine gave me a balun nine to ten years ago. I just don't remember which one it was. I remember him saying that he was giving me that particular balun in thinking that I would get my ticket and eventually be transmitting on it. I'm thinking it is a 4:1 Any help please. :-) Hello Gregg, Can you see the turns? If so, can you make a link to a picture and/or figure out how the windings are connected. There are many arrangements, so it is difficult to give you advise without knowing what you have. When you have access to some measurement equipment, you could measure it. You can use the voltage transformation ratio or use a source with VSWR indicator and adjust the load to lowest reading. You might search on "balun" with "guanella" this will show many useful links that will help you to do the determination based on visual inspection. Best regards, Wim PA3DJS www.tetech.nl without abc the email address is OK. |
#3
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On Jan 7, 3:43*am, Wimpie wrote:
On 7 ene, 09:27, Gregg wrote: A HAM friend of mine gave me a balun nine to ten years ago. I just don't remember which one it was. I remember him saying that he was giving me that particular balun in thinking that I would get my ticket and eventually be transmitting on it. I'm thinking it is a 4:1 Any help please. :-) Hello Gregg, Can you see the turns? If so, can you make a link to a picture and/or figure out how the windings are connected. There are many arrangements, so it is difficult to give you advise without knowing what you have. Ah, I see what you're saying. I'm almost embarrased to say this because I think it is a balun. This is what it looks like http://www.lowbander.com/sloper.html I remember him telling me that one of the sides was "hot"....which back then I didn't know what he meant....lol...but I do now, I just don't know how to find out which side is hot.sigh When you have access to some measurement equipment, you could measure it. You can use the voltage transformation ratio or use a source with VSWR indicator and adjust the load to lowest reading. OK. I follow you but I don't.:-) You're talking to the challenged when it comes to this. I have one of those 'Digital Measuring Instruments' made by Escort. If you could maybe either tell me exactly what side to touch or however you do it....I'd really appreciate it. I thought you would be able to tell me by me saying that he gave it to me in "hopes that I would be TX off it"....apparently you can do that with both the 4:1 and the 9:1??? I could have sworn thinking he said it was a 4:1 You might search on "balun" with "guanella" this will show many useful links that will help you to do the determination based on visual inspection. OK. Good deal. I never heard of the word "guanella" before - - but I'll check it out and I'll check to see if you responded back and try to figure it out. I don't plan on TX off it, but I'd sure like to use it for some type of antenna like that link I provided for you. Thanks a bunch for your help, it's appreciated. :-) |
#4
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On 8 ene, 04:21, Gregg wrote:
On Jan 7, 3:43*am, Wimpie wrote: On 7 ene, 09:27, Gregg wrote: A HAM friend of mine gave me a balun nine to ten years ago. I just don't remember which one it was. I remember him saying that he was giving me that particular balun in thinking that I would get my ticket and eventually be transmitting on it. I'm thinking it is a 4:1 Any help please. :-) Hello Gregg, Can you see the turns? If so, can you make a link to a picture and/or figure out how the windings are connected. There are many arrangements, so it is difficult to give you advise without knowing what you have. Ah, I see what you're saying. I'm almost embarrased to say this because I think it is a balun. This is what it looks likehttp://www.lowbander.com/sloper.html I remember him telling me that one of the sides was "hot"....which back then I didn't know what he meant....lol...but I do now, I just don't know how to find out which side is hot.sigh When you have access to some measurement equipment, you could measure it. You can use the voltage transformation ratio or use a source with VSWR indicator and adjust the load to lowest reading. OK. I follow you but I don't.:-) You're talking to the challenged when it comes to this. I have one of those 'Digital Measuring Instruments' made by Escort. If you could maybe either tell me exactly what side to touch or however you do it....I'd really appreciate it. I thought you would be able to tell me by me saying that he gave it to me in "hopes that I would be TX off it"....apparently you can do that with both the 4:1 and the 9:1??? I could have sworn thinking he said it was a 4:1 You might search on "balun" with "guanella" this will show many useful links that will help you to do the determination based on visual inspection. OK. Good deal. I never heard of the word "guanella" before - - but I'll check it out and I'll check to see if you responded back and try to figure it out. I don't plan on TX off it, but I'd sure like to use it for some type of antenna like that link I provided for you. Thanks a bunch for your help, it's appreciated. :-) Hello Gregg, When the previous owner says "it has a hot side" it is very likely not a balun, but an (auto) transformer for an off-center fed antenna (like FD4) or for providing easier match in combination with an antenna tuner. Many people call such a transformer a balun, but it isn’t in most cases. You can figure out some things yourself. Connect the coaxial side to the external antenna input (for portable SW receivers, mostly via a 3.5mm audio plug). Tune to a known relatively strong station that you can weakly hear when not touching the transformer. Touch one of the secondary terminals. The terminal that gives the strongest reception (signal strength) when touched is the hot side of an autotransformer type of unit. When there is no electrical connection between the coaxial side and terminals, it is not an autotransformer. Then you need to connect one of the terminals to a ground structure (or just for testing, to the braid of the coaxial cable that runs to your receiver). When there is virtually no difference in signal strength between terminals, and there is electrical connection between coaxial side and terminals, It is a balun, but probably without common mode suppression. When it is for reception on HF only, the difference between 1:4 or 1:9 is not that much (probably negligible). To fully know the device without measuring instruments, try to dismantle it and provide us with the winding details and/or picture. Regarding the link you provided, it is probably written by a good salesman. Best regards, Wim PA3DJS www.tetech.nl the email address is OK, but remove abc first. |
#5
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On Jan 8, 2:40*am, Wimpie wrote:
On 8 ene, 04:21, Gregg wrote: On Jan 7, 3:43*am, Wimpie wrote: On 7 ene, 09:27, Gregg wrote: A HAM friend of mine gave me a balun nine to ten years ago. I just don't remember which one it was. I remember him saying that he was giving me that particular balun in thinking that I would get my ticket and eventually be transmitting on it. I'm thinking it is a 4:1 Any help please. :-) Hello Gregg, Can you see the turns? If so, can you make a link to a picture and/or figure out how the windings are connected. There are many arrangements, so it is difficult to give you advise without knowing what you have. Ah, I see what you're saying. I'm almost embarrased to say this because I think it is a balun. This is what it looks likehttp://www.lowbander.com/sloper.html I remember him telling me that one of the sides was "hot"....which back then I didn't know what he meant....lol...but I do now, I just don't know how to find out which side is hot.sigh When you have access to some measurement equipment, you could measure it. You can use the voltage transformation ratio or use a source with VSWR indicator and adjust the load to lowest reading. OK. I follow you but I don't.:-) You're talking to the challenged when it comes to this. I have one of those 'Digital Measuring Instruments' made by Escort. If you could maybe either tell me exactly what side to touch or however you do it....I'd really appreciate it. I thought you would be able to tell me by me saying that he gave it to me in "hopes that I would be TX off it"....apparently you can do that with both the 4:1 and the 9:1??? I could have sworn thinking he said it was a 4:1 You might search on "balun" with "guanella" this will show many useful links that will help you to do the determination based on visual inspection. OK. Good deal. I never heard of the word "guanella" before - - but I'll check it out and I'll check to see if you responded back and try to figure it out. I don't plan on TX off it, but I'd sure like to use it for some type of antenna like that link I provided for you. Thanks a bunch for your help, it's appreciated. :-) Hello Gregg, When the previous owner says "it has a hot side" it is very likely not a balun, but an (auto) transformer for an off-center fed antenna (like FD4) or for providing easier match in combination with an antenna tuner. Many people call such a transformer a balun, but it isn’t in most cases. You can figure out some things yourself. Connect the coaxial side to the external antenna input (for portable SW receivers, mostly via a 3.5mm audio plug). Tune to a known relatively strong station that you can weakly hear when not touching the transformer. Touch one of the secondary terminals. The terminal that gives the strongest reception (signal strength) when touched is the hot side of an autotransformer type of unit. When there is no electrical connection between the coaxial side and terminals, it is not an autotransformer. Then you need to connect one of the terminals to a ground structure (or just for testing, to the braid of the coaxial cable that runs to your receiver). When there is virtually no difference in signal strength between terminals, and there is electrical connection between coaxial side and terminals, It is a balun, but probably without common mode suppression. When it is for reception on HF only, the difference between 1:4 or 1:9 is not that much (probably negligible). To fully know the device without measuring instruments, try to dismantle it and provide us with the winding details and/or picture. Regarding the link you provided, it is probably written by a good salesman. - Show quoted text - Ha in reference to the link that "was written by a good salesman." Yeah that is Mike, FWIW it wasn't from him that I obtained whatever the heck it is that I got. But it does look 'exactly' like that piece and a couple others on his same page. I pasted your response and I'll do what you said later today or tomorrow with the exception of opening it up, it looks and feels that it's all one piece, I know it could be opened - but if I can't figure it out by what you said - short of opening it - then I'll just leave it alone. But if I'm just using it just for another receiving antenna of some sorts - - in the long run does it really matter if it's a balun or a transformer? I promise that will be my last question on this. :-) Thanks again. |
#6
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On 8 ene, 12:20, Gregg wrote:
On Jan 8, 2:40*am, Wimpie wrote: On 8 ene, 04:21, Gregg wrote: On Jan 7, 3:43*am, Wimpie wrote: On 7 ene, 09:27, Gregg wrote: A HAM friend of mine gave me a balun nine to ten years ago. I just don't remember which one it was. I remember him saying that he was giving me that particular balun in thinking that I would get my ticket and eventually be transmitting on it. I'm thinking it is a 4:1 Any help please. :-) Hello Gregg, Can you see the turns? If so, can you make a link to a picture and/or figure out how the windings are connected. There are many arrangements, so it is difficult to give you advise without knowing what you have. Ah, I see what you're saying. I'm almost embarrased to say this because I think it is a balun. This is what it looks likehttp://www.lowbander.com/sloper.html I remember him telling me that one of the sides was "hot"....which back then I didn't know what he meant....lol...but I do now, I just don't know how to find out which side is hot.sigh When you have access to some measurement equipment, you could measure it. You can use the voltage transformation ratio or use a source with VSWR indicator and adjust the load to lowest reading. OK. I follow you but I don't.:-) You're talking to the challenged when it comes to this. I have one of those 'Digital Measuring Instruments' made by Escort. If you could maybe either tell me exactly what side to touch or however you do it....I'd really appreciate it. I thought you would be able to tell me by me saying that he gave it to me in "hopes that I would be TX off it"....apparently you can do that with both the 4:1 and the 9:1??? I could have sworn thinking he said it was a 4:1 You might search on "balun" with "guanella" this will show many useful links that will help you to do the determination based on visual inspection. OK. Good deal. I never heard of the word "guanella" before - - but I'll check it out and I'll check to see if you responded back and try to figure it out. I don't plan on TX off it, but I'd sure like to use it for some type of antenna like that link I provided for you. Thanks a bunch for your help, it's appreciated. :-) Hello Gregg, When the previous owner says "it has a hot side" it is very likely not a balun, but an (auto) transformer for an off-center fed antenna (like FD4) or for providing easier match in combination with an antenna tuner. Many people call such a transformer a balun, but it isn’t in most cases. You can figure out some things yourself. Connect the coaxial side to the external antenna input (for portable SW receivers, mostly via a 3.5mm audio plug). Tune to a known relatively strong station that you can weakly hear when not touching the transformer. Touch one of the secondary terminals. The terminal that gives the strongest reception (signal strength) when touched is the hot side of an autotransformer type of unit. When there is no electrical connection between the coaxial side and terminals, it is not an autotransformer. Then you need to connect one of the terminals to a ground structure (or just for testing, to the braid of the coaxial cable that runs to your receiver). When there is virtually no difference in signal strength between terminals, and there is electrical connection between coaxial side and terminals, It is a balun, but probably without common mode suppression. When it is for reception on HF only, the difference between 1:4 or 1:9 is not that much (probably negligible). To fully know the device without measuring instruments, try to dismantle it and provide us with the winding details and/or picture. Regarding the link you provided, it is probably written by a good salesman. - Show quoted text - Ha in reference to the link that "was written by a good salesman." Yeah that is Mike, FWIW it wasn't from him that I obtained whatever the heck it is that I got. But it does look 'exactly' like that piece and a couple others on his same page. I pasted your response and I'll do what you said later today or tomorrow with the exception of opening it up, it looks and feels that it's all one piece, I know it could be opened - but if I can't figure it out by what you said - short of opening it - then I'll just leave it alone. But if I'm just using it *just for another receiving antenna of some sorts - - in the long run does it really matter if it's a balun or a transformer? I promise that will be my last question on this. :-) Thanks again. Hello Gregg, When you have an outdoor piece of wire and a ground rod (or use a fence as ground), you have an unbalanced antenna. Just connect the center conductor of the coaxial cable to the antenna wire and the braid to your ground provision. Do not put long wire between the braid and your ground provision. At low frequency, the length of the wire antenna can be very short with respect to wavelength, hence showing a high impedance. Adding a 1:4 or 1:9 transformer will result in more signal to your receiver. Note that more signal is not equal to better reception. When the noise from the antenne without transformer exceeds the receivers's noise, adding the transformer (to get mor signal) doesn't increase S/N ratio. When you have a symmetrical antenna (for example dipole of 10m (2*5m), best is to use a real balun. It may reduce interference from domestic equipment that couples to the coaxial cable part that runs close to equipment in your house. also here a 1:4 or 1:9 balun will extract more signal from the antenna (at low HF). When you need further information, don't hesitate to post again. Best regards, Wim PA3DJS www.tetech.nl |
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