Saturday, March 19, 2016
Loop Feed and Measurements
This post has been moved to the new blog, here:
https://kw2p.shuttersparks.net/loop-feed-and-measurements/
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This post has been moved to the new blog, here:
https://kw2p.shuttersparks.net/loop-feed-and-measurements/
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This post has been moved to the new blog, here:
https://kw2p.shuttersparks.net/loop-feed-and-measurements/
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Hello, my name is Phil. I'm a retired engineer, well-traveled, multi-lingual, cosmopolitan sort of guy. Welcome to a blog of my amateur radio activities and thoughts on amateur radio topics. I hope you find it interesting.
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5 comments:
I am Liviu, YO8RZK. Showing you here is actually a balun 1: 1 continued with a 1: 1 balun. I think we should correct drawing.
And ''FT140-61 toroid with seven trifilar turns'' corect according to photo there are 8 turns
Another wrong information: ''The crossover has no effect on the performance of the transformer and provides for the input and output wires to come out on opposite sides, which is handy in this case.''
It looks like you posted just for posting
Great Article! Thanks for Sharing valuable information.
SMPS Transformer Manufacturer in Germany | Toroidal Transformer in Germany
yo8rzk,
I just noticed your comments. I don't know why I didn't get a notification from Blogger.
You're correct about the eight turns. I corrected that over on the new blog. However, the precise number of turns is unimportant. Seven, eight, or nine turns would all work fine. This is a transmission line transformer, not a conventional transformer. The two work on entirely different principles.
Also, the crossover on the 240 core indeed has no effect on operation or performance.
Lastly, I think you might study transmission line transformers a bit more before making pronouncements that are simply wrong. There are several good books on the topic. I've been building such things for over 40 years. Were it two 1:1 transformers in series as you suggest, how do you explain the measured 2.25:1 impedance transformation?
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