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4:1 coaxial baluns
Yes I know I can look this up....
Am currently feeding a 20M single triangular quad loop about 3 metres off the ground with a 1/4 wavelength 75r Q section. Modelling the loop shows a high-ish Z of 180 ohms. Not a problem for this feed method though. (I expected it to be around 120 ohms) Thinking of making it work on 10M and Z I think is around 350 ohms, but I havent modelled it. If I use a 4:1 coaxial balun cut for 20M, does the 4:1 effect (now a full wavelength) also occur on 10M? (Thinking a 3/4 wavelength Q section is the same as a 1/4 wavelength one when it comes to translating the Z) I am not and will not be using a tuner... (in case anyone wants to suggest it) TIA Bob VK2YQA |
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