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Baluns?
Everyone makes fun of newbies buying ready-built dipoles on eBay, but
nobody can direct you to where to buy baluns? Searched hi and lo online, and what I found, was more expensive than buying a ready-made dipole! I'd like to buy a balun, and attach my own cut-to-length wire, but can't find cheap baluns ANYWHERE. Where are you Elmers buying your baluns? |
Baluns?
dbc254 wrote:
Where are you Elmers buying your baluns? How about balun kits from Amidon? https://www.amidoncorp.com/categories/12?page_number=2 -- 73, Cecil http://www.w5dxp.com |
Baluns?
dbc254 wrote:
Everyone makes fun of newbies buying ready-built dipoles on eBay, but nobody can direct you to where to buy baluns? Searched hi and lo online, and what I found, was more expensive than buying a ready-made dipole! I'd like to buy a balun, and attach my own cut-to-length wire, but can't find cheap baluns ANYWHERE. Where are you Elmers buying your baluns? They are simply too simple to build to buy! http://www.universal-radio.com/CATALOG/misc/amidon.html Pick your core, grab a few feet of wire ... Regards, JS |
Baluns?
dbc254 wrote:
Everyone makes fun of newbies buying ready-built dipoles on eBay, but nobody can direct you to where to buy baluns? Searched hi and lo online, and what I found, was more expensive than buying a ready-made dipole! I'd like to buy a balun, and attach my own cut-to-length wire, but can't find cheap baluns ANYWHERE. Where are you Elmers buying your baluns? Oh yeah, you probably guessed ... but just in case -- we make fun of newbies buying baluns too! (well, unun's also) 8-) Regards, JS |
Baluns?
why this two companies? Keep for yourself.
"John Smith" wrote in message ... dbc254 wrote: Everyone makes fun of newbies buying ready-built dipoles on eBay, but nobody can direct you to where to buy baluns? Searched hi and lo online, and what I found, was more expensive than buying a ready-made dipole! I'd like to buy a balun, and attach my own cut-to-length wire, but can't find cheap baluns ANYWHERE. Where are you Elmers buying your baluns? They are simply too simple to build to buy! http://www.universal-radio.com/CATALOG/misc/amidon.html Pick your core, grab a few feet of wire ... Regards, JS |
Baluns?
Bob wrote:
why this two companies? Keep for yourself. why you "talk" so? Speak him not me! 8-) Regards, JS Half-a-Brain-McCain'n Insane; So Lawdy Mama, It Looks Like Obama! |
Baluns?
"dbc254" wrote in message ... Everyone makes fun of newbies buying ready-built dipoles on eBay, but nobody can direct you to where to buy baluns? Searched hi and lo online, and what I found, was more expensive than buying a ready-made dipole! I'd like to buy a balun, and attach my own cut-to-length wire, but can't find cheap baluns ANYWHERE. Where are you Elmers buying your baluns? you have coax? split one end, connect center conductor to one wire, shield to the other. wind a bunch of turns (there is a web site somewhere with numbers) around a piece of pvc pipe, and voila, instant balun. you want to pay for off the shelf stuff, expect to pay for the ferrites that can handle 1500w all the way down to 160m, plus construction, packaging, shipping, and marketting... that stuff is more expensive than the rest of the antenna. want to be even cheaper? use twin lead, connect it directly to the wire and run it down to a tuner that includes a balun... do it all in one place with less loss. |
Baluns?
"Dave" wrote in message news:nlktk.864$UX.475@trnddc03... "dbc254" wrote in message ... Everyone makes fun of newbies buying ready-built dipoles on eBay, but nobody can direct you to where to buy baluns? Searched hi and lo online, and what I found, was more expensive than buying a ready-made dipole! I'd like to buy a balun, and attach my own cut-to-length wire, but can't find cheap baluns ANYWHERE. Where are you Elmers buying your baluns? you have coax? split one end, connect center conductor to one wire, shield to the other. wind a bunch of turns (there is a web site somewhere with numbers) around a piece of pvc pipe, and voila, instant balun. you want to pay for off the shelf stuff, expect to pay for the ferrites that can handle 1500w all the way down to 160m, plus construction, packaging, shipping, and marketting... that stuff is more expensive than the rest of the antenna. Price the 20 or 30 feet of coax to wind the balun (choke) and it may be cheeper to buy a balun. I don't see wasting time or money on a balun for just a simple dipole . Sure it may make the patern vary from the normal textbook, but who cares most of the time. Most people have to put the antenna up wherever they can and lots of time it is not in the desired direction anyway. NOw a beam or some other antenna design is differant. |
Baluns?
Regards,
JS Half-a-Brain-McCain'n Insane; So Lawdy Mama, It Looks Like Obama! I thought as much-- Your problem is obvious. |
Baluns?
JB wrote:
Regards, JS Half-a-Brain-McCain'n Insane; So Lawdy Mama, It Looks Like Obama! I thought as much-- Your problem is obvious. What? You think yours is hidden? :-| Regards, JS Half-a-Brain-McCain'n Insane; So Lawdy Mama, It Looks Like Obama! |
Baluns?
Everyone makes fun of newbies buying ready-built dipoles on eBay, but nobody can direct you to where to buy baluns? Searched hi and lo online, and what I found, was more expensive than buying a ready-made dipole! I'd like to buy a balun, and attach my own cut-to-length wire, but can't find cheap baluns ANYWHERE. Where are you Elmers buying your baluns? Every major amateur radio dealer I have bought from had baluns in their inventory, Ham Radio Outlet and Amateur Electronic Supply, to name two. However, you might find a wider selection from http://www.radioworks.com Ed K7AAT |
Baluns?
On Wed, 27 Aug 2008 13:17:39 -0700 (PDT), dbc254
wrote: Where are you Elmers buying your baluns? I build my own. Some reading material: http://www.dxzone.com/catalog/Antennas/Baluns/ However, if you wanna stimulate the economy, there are 7 commercial balun reviews on eHam: http://www.eham.net/reviews/products/1 -- # Jeff Liebermann 150 Felker St #D Santa Cruz CA 95060 # 831-336-2558 # http://802.11junk.com # http://www.LearnByDestroying.com AE6KS |
Baluns?
"dbc254" wrote in message ... Everyone makes fun of newbies buying ready-built dipoles on eBay, but nobody can direct you to where to buy baluns? Searched hi and lo online, and what I found, was more expensive than buying a ready-made dipole! I'd like to buy a balun, and attach my own cut-to-length wire, but can't find cheap baluns ANYWHERE. Where are you Elmers buying your baluns? I don't bother with them. The ionosphere goofs up my pattern anyway. |
Baluns?
dbc254 wrote in news:110c0833-aa68-4266-b599-
: Everyone makes fun of newbies buying ready-built dipoles on eBay, but nobody can direct you to where to buy baluns? Searched hi and lo online, and what I found, was more expensive than buying a ready-made dipole! I'd like to buy a balun, and attach my own cut-to-length wire, but can't find cheap baluns ANYWHERE. Where are you Elmers buying your baluns? I think you haven't tried very hard. No endorsement: http://www.thewireman.com/baluns.html The above will have components you can use to make your own... a real learning exercise. dxengineering.com Owen |
Baluns?
"dbc254" wrote in message ... Everyone makes fun of newbies buying ready-built dipoles on eBay, but nobody can direct you to where to buy baluns? Searched hi and lo online, and what I found, was more expensive than buying a ready-made dipole! I'd like to buy a balun, and attach my own cut-to-length wire, but can't find cheap baluns ANYWHERE. Where are you Elmers buying your baluns? My last purchase was from HRO, about $25 for a 1:1 to use with a wire dipole. Go to www.hamradio.com, enter balun in the search box and step through the offerings with Adobe Reader. Many hams will recommend you try a home-made balun, multiple turns of coax cable wound neatly around a cylindrical form. Exact requirements and effectiveness may vary with frequency and the antenna as installed. You might want to look at http://www.qsl.net/ta1dx/amator/broadband_baluns.htm. (It bothered me to see the letter W used for "ohms" in two places. I didn't spot any other errors/typos but ...) Also: http://www.hamuniverse.com/balun.html (many pictures) |
Baluns?
Ralph Mowery wrote:
I don't see wasting time or money on a balun for just a simple dipole . Sure it may make the patern vary from the normal textbook, but who cares most of the time. Most people have to put the antenna up wherever they can and lots of time it is not in the desired direction anyway. Very often, those are the same people who complain of "poor conditions" and "noisy bands", and operate in constant fear of causing RFI. Many of these problems are simply due to common-mode feedline currents bringing RF back into the shack and coupling into the mains wiring. In other words, people with limited antenna opportunities are often the ones who need a balun - or more accurately, a common-mode choke - the MOST. The problems of desperate antenna locations cannot be entirely cured, but they *can* be improved. Almost always, feedline chokes and/or baluns will have a valuable part to play. NOw a beam or some other antenna design is differant. The largest difference is in the attitudes of the users. No matter what your antenna is, or where you're forced to install it, it all comes down to one simple question: do you want to give this antenna the best possible chance to work correctly... or not? -- 73 from Ian GM3SEK 'In Practice' columnist for RadCom (RSGB) http://www.ifwtech.co.uk/g3sek |
Baluns?
Many hams will recommend you try a home-made balun, multiple turns of coax
cable wound neatly around a cylindrical form. Exact requirements and effectiveness may vary with frequency and the antenna as installed. You might want to look at http://www.qsl.net/ta1dx/amator/broadband_baluns.htm. (It bothered me to see the letter W used for "ohms" in two places. I didn't spot any other errors/typos but ...) Also: http://www.hamuniverse.com/balun.html (many pictures) ================ Nice URL with excellent info tnx Frank GM0CSZ / KN6WH |
Baluns?
Highland Ham wrote:
Also: http://www.hamuniverse.com/balun.html (many pictures) ================ Nice URL with excellent info The problem with ugly baluns is their limited frequency ranges. In the following measurements, the choking impedance was over 1k ohms for only small ranges of frequencies, 19-29 MHz, 10-22 MHz, 16-25 MHz, 8-16 MHz, 5-8 MHz - frequency ranges of 2/1 or less. HF covers a 10/1 frequency range. http://www.k1ttt.net/technote/airbalun.html -- 73, Cecil http://www.w5dxp.com |
Baluns?
"John Smith" wrote in message ... JB wrote: Regards, JS Half-a-Brain-McCain'n Insane; So Lawdy Mama, It Looks Like Obama! I thought as much-- Your problem is obvious. What? You think yours is hidden? :-| The Devil deceives many and jeers at the truth. But those who call on the Lord in prayer keep him at bay. The sun shines on the wicked and the righteous. |
Baluns?
Many hams will recommend you try a home-made balun, multiple turns of coax
cable wound neatly around a cylindrical form. Exact requirements and effectiveness may vary with frequency and the antenna as installed. I saw an interesting talk at a local ham-club, at which the presenter gave an explanation for one reason that the "effectiveness may vary" with these sorts of choke baluns. The common-mode impedance created by many such chokes is primarily inductive (below the choke's self-resonant frequency, at least). The impedance of the unwanted current path (e.g. from the antenna feedpoint, back along the outside of the feedline, to the transceiver chassis or to the point at which the coax is grounded) will depend on the frequency and the length of the coax. It'll have a resistive component (from loss resistance and from radiation resistance) and will usually have a reactive component as well... either inductive or capacitive. If the feedline-path reactance is inductive or near zero, all is well... the choke balun's inductive reactance will (if sufficiently high) block most current flow along this path. On the other hand, if the feedline-path reactance is capacitive, and happens to be close in absolute value to the inductive reactance of the choke... then you've got a series-resonant circuit. The two reactances will largely cancel, the choke will "vanish", and you can actually have more current flow back along the feedline than you would without the choke. If you change the length of the feedline, the choke's performance can get better, or worse. His prescription: if you want choking that's going to be effective at a wide range of frequencies and won't be sensitive to the feedline length, you need to use a choke which will introduce a significant amount of resistive loss into the choked path (but not, of course, into the differential path that feeds the antenna). The usual solution is a ferrite. -- Dave Platt AE6EO Friends of Jade Warrior home page: http://www.radagast.org/jade-warrior I do _not_ wish to receive unsolicited commercial email, and I will boycott any company which has the gall to send me such ads! |
Baluns?
Dave Platt wrote:
On the other hand, if the feedline-path reactance is capacitive, and happens to be close in absolute value to the inductive reactance of the choke... then you've got a series-resonant circuit. This is one reason why an ugly choke only works well over approximately a 2:1 frequency range. Below that range, the inductive reactance is too small and above that range, series resonance defeats the purpose. -- 73, Cecil http://www.w5dxp.com |
Baluns?
JB wrote:
... The Devil deceives many and jeers at the truth. But those who call on the Lord in prayer keep him at bay. The sun shines on the wicked and the righteous. Is there some vending machine which dispenses such as you? Are you a "Pod Person" that is grown from some plant from Mars and attempts to mimic humans? Do you think you a member of the church of satan, are insane, and this motivates you? You are an idiot with no shame, I will grant you that ... Regards, JS Half-a-Brain-McCain'n Insane; So Lawdy Mama, It Looks Like Obama! |
Baluns?
Dave Platt wrote:
... I saw an interesting talk at a local ham-club, at which the presenter gave an explanation for one reason that the "effectiveness may vary" with these sorts of choke baluns. ... In 1982, when I worked for Boeing, they flew us to New York to attend some lectures ... Anyway, I remember one guy who gave an hour-and-a-half talk, complete with slides, charts, models and other presentation aids on why the bumblebee can't possibly fly ... it was totally fascinating, the data looked absolutely real!--even though everyone (well, most) in the room realized they were being "put on." To anyone who has wound and used a few dozen chokes/baluns/ununs of varying designs, I highly recommend the "Bumblebee Lecture." Now, I am off to watch a few bumblebees crawl about ... Regards, JS |
Baluns?
On Aug 28, 8:45*am, Cecil Moore wrote:
Highland Ham wrote: Also: *http://www.hamuniverse.com/balun.html*(many pictures) ================ Nice URL with excellent info The problem with ugly baluns is their limited frequency ranges. In the following measurements, the choking impedance was over 1k ohms for only small ranges of frequencies, 19-29 MHz, 10-22 MHz, 16-25 MHz, 8-16 MHz, 5-8 MHz - frequency ranges of 2/1 or less. HF covers a 10/1 frequency range. http://www.k1ttt.net/technote/airbalun.html -- 73, Cecil *http://www.w5dxp.com I noticed the use of a lot of tie wraps. Its never a good idea to use these exposed to sun light. Jimmie |
Baluns?
"JIMMIE" wrote in I noticed the use of a lot of tie wraps. Its never a good idea to use these exposed to sun light. Most of the white tie wraps will not withstand sunlight. The black ones are more UV ray resistant and do beter. I sometimes use the white ones, but cover them with tape. Scotch 33 tape. |
Baluns?
dbc254 wrote:
Everyone makes fun of newbies buying ready-built dipoles on eBay, but nobody can direct you to where to buy baluns? Searched hi and lo online, and what I found, was more expensive than buying a ready-made dipole! I'd like to buy a balun, and attach my own cut-to-length wire, but can't find cheap baluns ANYWHERE. Where are you Elmers buying your baluns? Here are diagrams of one type of balun which will server you well: http://assemblywizard.fr33webhost.com/balun1.jpg http://assemblywizard.fr33webhost.com/balun2.jpg You will need to pick the proper material you need for the core, and compute the turns necessary for the freqs in question (lowest freq will determine these), there are abundant design pages on the web ... google is your friend. Regards, JS Half-a-Brain-McCain'n Insane; So Lawdy Mama, It Looks Like Obama! |
Baluns?
JIMMIE wrote:
I noticed the use of a lot of tie wraps. Its never a good idea to use these exposed to sun light. ============================= Black tie wraps contain carbon black and are hence UV resistant and almost last forever. Coloured or non pigmented plastic will indeed deteriorate due to UV radiation. Polypropylene rope , for example ,is usually coloured but never black. Reason : If black it would not deteriorate due to exposure to UV ,hence it would last far too long and the manufacturers would only need to produce a fraction of their current production. That's commercial life. If you use rope other then polyester (sailing boats etc) try to find a black plastic variety (not easy). My 40 ft mast has (blue)polypropylene guys which need to be replaced every 8 -9 years (even here in northern Scotland) ,but it is cheap compared with polyester rope. Frank GM0CSZ / KN6WH |
Baluns?
"John Smith" wrote in message ... JB wrote: ... The Devil deceives many and jeers at the truth. But those who call on the Lord in prayer keep him at bay. The sun shines on the wicked and the righteous. Is there some vending machine which dispenses such as you? Are you a "Pod Person" that is grown from some plant from Mars and attempts to mimic humans? Do you think you a member of the church of satan, are insane, and this motivates you? You are an idiot with no shame, I will grant you that ... Regards, JS Half-a-Brain-McCain'n Insane; So Lawdy Mama, It Looks Like Obama! I will pray for you that your heart might be opened to Jesus some day. Then with the blinders off you might truly discern the enemy and his devices. "But I say unto you, That whosoever is angry with his brother without a cause shall be in danger of the judgment: and whosoever shall say to his brother, Raca, shall be in danger of the council: but whosoever shall say, Thou fool, shall be in danger of hell fire." Mathew 5:22 |
Baluns?
JB wrote:
I will pray for you that your heart might be opened to Jesus some day. Why would people who don't believe in magic antennas believe in magic human beings? -- 73, Cecil http://www.w5dxp.com |
Baluns?
JB wrote:
"John Smith" wrote in message ... JB wrote: ... The Devil deceives many and jeers at the truth. But those who call on the Lord in prayer keep him at bay. The sun shines on the wicked and the righteous. Is there some vending machine which dispenses such as you? Are you a "Pod Person" that is grown from some plant from Mars and attempts to mimic humans? Do you think you a member of the church of satan, are insane, and this motivates you? You are an idiot with no shame, I will grant you that ... Regards, JS Half-a-Brain-McCain'n Insane; So Lawdy Mama, It Looks Like Obama! I will pray for you that your heart might be opened to Jesus some day. Then with the blinders off you might truly discern the enemy and his devices. "But I say unto you, That whosoever is angry with his brother without a cause shall be in danger of the judgment: and whosoever shall say to his brother, Raca, shall be in danger of the council: but whosoever shall say, Thou fool, shall be in danger of hell fire." Mathew 5:22 "John Smith" is certainly going to end up in hell, no doubt about that. 73, Tom Donaly, KA6RUH |
Baluns?
Cecil Moore wrote:
JB wrote: I will pray for you that your heart might be opened to Jesus some day. Why would people who don't believe in magic antennas believe in magic human beings? Maybe it's because magic is a lot easier to understand than quantum electrodynamics. 73, Tom Donaly, KA6RUH |
Baluns?
JB wrote:
... Regards, JS Half-a-Brain-McCain'n Insane; So Lawdy Mama, It Looks Like Obama! I will pray for you that your heart might be opened to Jesus some day. Then with the blinders off you might truly discern the enemy and his devices. "But I say unto you, That whosoever is angry with his brother without a cause shall be in danger of the judgment: and whosoever shall say to his brother, Raca, shall be in danger of the council: but whosoever shall say, Thou fool, shall be in danger of hell fire." Mathew 5:22 Hey, I think I remember the movie you are quoting; It was by Stephen King, wasn't it? :-| Regards, JS Half-a-Brain-McCain'n Insane; So Lawdy Mama, It Looks Like Obama! |
Baluns?
Tom Donaly wrote:
... "John Smith" is certainly going to end up in hell, no doubt about that. 73, Tom Donaly, KA6RUH Krist, I thought I was already there! That is certainly bad news ... :-( Regards, JS Half-a-Brain-McCain'n Insane; So Lawdy Mama, It Looks Like Obama! |
Baluns?
John Smith wrote:
... Hey, I think I remember the movie you are quoting; It was by Stephen King, wasn't it? :-| Regards, JS Half-a-Brain-McCain'n Insane; So Lawdy Mama, It Looks Like Obama! I probably should make that point a bit "more clear." A race of aliens a mere few hundred years ahead of us would be difficult for us to discern from Gods. A race 1000 years, 10,000 years, 100,000 years, 1,000,000 years, 100,000,000 years would probably, most likely, be GOD! Regards, JS Half-a-Brain-McCain'n Insane; So Lawdy Mama, It Looks Like Obama! |
Baluns?
On Aug 29, 6:49*am, Highland Ham
wrote: JIMMIE wrote: I noticed the use of a lot of tie wraps. Its never a good idea to use these exposed to sun light. ============================= Black tie wraps contain carbon black and are hence UV resistant and almost last forever. Coloured or non pigmented plastic will indeed deteriorate due to UV radiation. Polypropylene rope , for example ,is usually coloured *but never black. Reason : *If black it would not deteriorate due to exposure to UV ,hence it would last far too long and the manufacturers would only need to produce a fraction of their current production. That's commercial life. If you use *rope other then polyester (sailing boats etc) *try to find a black plastic variety (not easy). My 40 ft mast has (blue)polypropylene guys which need to be replaced every 8 -9 years (even here in northern Scotland) ,but it is cheap compared with polyester rope. Frank * *GM0CSZ / KN6WH Sorry I should have said "white tie wraps as shown on the website". Black tie wraps dont last forever, they still get brittle and break just from being in the sun. I wouldnt use them either unless they got regular inspections. I tie wrapped coax to an antenna mast down in Florida about 5 years ago and they are breaking. No doubt they would last a lot longer in Scotland. Jimmie |
Baluns?
"JB" wrote in message news:5%Ztk.29$Af3.22@trnddc06... whosoever shall say, Thou fool, shall be in danger of hell fire." Mathew 5:22 Verily, he who sits upon a hot iron shall be branded in the end. -- Alfred E. Newman |
Baluns?
"Sal M. Onella" wrote in message ... "JB" wrote in message news:5%Ztk.29$Af3.22@trnddc06... whosoever shall say, Thou fool, shall be in danger of hell fire." Mathew 5:22 Verily, he who sits upon a hot iron shall be branded in the end. -- Alfred E. Newman At least we found someone with a sense of humor. |
Baluns?
"John Smith" wrote in message ... John Smith wrote: ... Hey, I think I remember the movie you are quoting; It was by Stephen King, wasn't it? :-| Regards, JS Half-a-Brain-McCain'n Insane; So Lawdy Mama, It Looks Like Obama! I probably should make that point a bit "more clear." A race of aliens a mere few hundred years ahead of us would be difficult for us to discern from Gods. When have you ever met a race of aliens? None? Then your statement is a fantasy construct. The would likely be assassinated in the Media. |
Baluns?
JB wrote:
... When have you ever met a race of aliens? None? Then your statement is a fantasy construct. The would likely be assassinated in the Media. Well, I have never met "a new energy source" either. Does this mean I can now dismiss all possibilities and go out into the world preaching that all sources of energy have now been discovered and we are doomed? Funny, where I come from, logic just doesn't work like that ... Regards, JS Half-a-Brain-McCain'n Insane; So Lawdy Mama, It Looks Like Obama! |
Baluns?
JB wrote:
When have you ever met a race of aliens? None? Then your statement is a fantasy construct. Couldn't the same thing be said about God? -- 73, Cecil http://www.w5dxp.com |
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