In this video I tested an antenna matching transformer just to see what kind of signal I got in comparison to not having one at all, and the results were surprising
I like this content, and just to add what little I know about this, the company I worked for in the commercial electronics business, for Motorola professional radios, has a sister company that makes TV antennas for the inland waterways towboat trade. I remember the man over the operation telling me that baluns are not all created the same. I have no idea what brand they use, but he said some were better than others. Just for what it's worth. I enjoy your content. Thank you.
Is there a way for you to, easily, use the same antenna for all the tests and swap out the baluns? The easiest way I can think of myself would be to make one single loop glued or taped flat on a small piece plywood or something similar, and have both ends terminate at screws that the baluns could be attached under. This way you have a constant antenna shape and distance between loops ends, which actually can impact performance I've always read. Then you can change coax types and lengths as needed as well relatively quickly for other tests if you so chose. You could stretch a bunch of different testing from a short afternoon into a couple different quick videos to get your activity up. Regardless, love your stuff. I always find it inspiring.
I kept all of the loops the same diameter, although I measured them by holding the loops next to each other which could result in a small margin of error, but I like your idea. I may do this in an up coming video.
What I am wondering is if a top of the line balun would make a positive difference ??? I remember reading somewhere that cheap CHINA balun varied so much in electrical value this would cause erratic behavior.What do you think ??
As far as I know my balun was fine, but comparing a few of them would be an interesting experiment. I noticed a small difference is the size of the loop makes a big difference.
Would be interesting to do that again at the same location paying close attention to weather conditions, time of day, etc. Also loops need to be uniform. A couple different size loops all running the exact same coax and length. I know, who has that kind of time. So many variables not even funny! And thats just on your end!
old tv's receivers were designed for 300 ohm load , new tv's receivers were designed for 75 ohm load ham radio is designed for 50 ohm load old tv's you use that balun transformer 300 ohm to 75 Ohm unbalanced coax antennas your test is about the same as this video on testing antennas without the fancy test gear antenna testing ua-cam.com/video/xys8Vsm4-Kk/v-deo.html
Nice to have you back. That was interesting.
I like this content, and just to add what little I know about this, the company I worked for in the commercial electronics business, for Motorola professional radios, has a sister company that makes TV antennas for the inland waterways towboat trade. I remember the man over the operation telling me that baluns are not all created the same. I have no idea what brand they use, but he said some were better than others. Just for what it's worth. I enjoy your content. Thank you.
Good to see you upload again mate.
Is there a way for you to, easily, use the same antenna for all the tests and swap out the baluns?
The easiest way I can think of myself would be to make one single loop glued or taped flat on a small piece plywood or something similar, and have both ends terminate at screws that the baluns could be attached under.
This way you have a constant antenna shape and distance between loops ends, which actually can impact performance I've always read. Then you can change coax types and lengths as needed as well relatively quickly for other tests if you so chose.
You could stretch a bunch of different testing from a short afternoon into a couple different quick videos to get your activity up.
Regardless, love your stuff. I always find it inspiring.
I kept all of the loops the same diameter, although I measured them by holding the loops next to each other which could result in a small margin of error, but I like your idea. I may do this in an up coming video.
I suppose the difference is residual for Rx but it would be a different story for Tx because of high SWR if unmatched.
I wonder if the baluns would have more of an effect with longer cables, e.g. a 50' downlead from an outdoor mast mounted antenna.
What I am wondering is if a top of the line balun would make a positive difference ??? I remember reading somewhere that cheap CHINA balun varied so much in electrical value this would cause erratic behavior.What do you think ??
As far as I know my balun was fine, but comparing a few of them would be an interesting experiment. I noticed a small difference is the size of the loop makes a big difference.
Good to see you back buddy :)
baluns are needed for matching cable, in you setup it so short to input,and shorting out the input
I'm not sure how that could be, but I will try it again with a longer cable.
nice video. it was an interesting experiment
Would be interesting to do that again at the same location paying close attention to weather conditions, time of day, etc. Also loops need to be uniform. A couple different size loops all running the exact same coax and length. I know, who has that kind of time. So many variables not even funny! And thats just on your end!
I was thinking the same thing since my signal meter was changing so much.
How do you know your antenna's impedance before test with and without a matcher?
Thanks for sharing 😀
You stated '... not much of a view...' but that's a great view! I'm guessing that's I-5...
Yes you're looking at 1-5... I was mainly referring to the lack of mountains and trees. It was hard to find a spot this wide open spot in these parts.
I wish I had something to add... But obviously you used too much glue! :p
Yes, but I don't believe my glue would have any substantial effect.
@@GrantsPassTVRepair me either. I was just poking fun. :P
old tv's receivers were designed for 300 ohm load ,
new tv's receivers were designed for 75 ohm load
ham radio is designed for 50 ohm load
old tv's you use that balun transformer 300 ohm to 75 Ohm unbalanced coax
antennas
your test is about the same as this video on testing antennas without the fancy test gear
antenna testing
ua-cam.com/video/xys8Vsm4-Kk/v-deo.html
first!!