Hi. I would like to try this with y/8 spacing and phase coupled. The phase shifting will be made in the shack with L/C. Approximately how much will be the impedance of one element with y/8 spacing ?
Thanks for the comment. Unfortunately I've changed computers since I made this video so I don't have the MMANA GAL file for this configuration. It seems that you're asking to change the 3/4 lambda spacing to a 1/8 lambda spacing if I understand you correctly. Again, I don't have this file anymore but would encourage you to do a quick MMANA GAL simulation and input 1/8 lambda for the spacing, so change X1 and X2 to 0.125 while in "lambda mode". Best of luck on your project, sounds like an interesting one. 73!
@@quantumradio Thanks a lot for your quick reply. Yes I will make that with 1/8 lambda spacing. I made a two element phase coupled deltaloop wire antenna, but they are not on the same altitude. The F/B ratio is only 12..18 dB.
That is good, but 1.5 lamba is too much for my roof. If you put two 1/2 lamba (0.5 lambda) dipoles spaced 0.2 lambda (+/- 0.1 lambda) instead +/-0.75 - with 135 degrees delay line, you may get similar result. Saving space on the roof is my priority. If you want more, rather rise antenna as high as possible. For example, I can put up to 13 meters (my roof is 11m + 2m pole = 13m). Then I can get 11.61 dB gain and -3.76 dB F/B ratio. What is more important, by rising antenna 3 meters above value you provided, I can get +3.2 dB at 5 deg. elevation (or -0.2 dBi at 10m height). What you think?
hi - just discovered your excellent channel. keep up the great work its really appreciated
Thanks, will do!
Hi. I would like to try this with y/8 spacing and phase coupled. The phase shifting will be made in the shack with L/C. Approximately how much will be the impedance of one element with y/8 spacing ?
Thanks for the comment. Unfortunately I've changed computers since I made this video so I don't have the MMANA GAL file for this configuration. It seems that you're asking to change the 3/4 lambda spacing to a 1/8 lambda spacing if I understand you correctly. Again, I don't have this file anymore but would encourage you to do a quick MMANA GAL simulation and input 1/8 lambda for the spacing, so change X1 and X2 to 0.125 while in "lambda mode". Best of luck on your project, sounds like an interesting one. 73!
@@quantumradio Thanks a lot for your quick reply. Yes I will make that with 1/8 lambda spacing. I made a two element phase coupled deltaloop wire antenna, but they are not on the same altitude. The F/B ratio is only 12..18 dB.
That is good, but 1.5 lamba is too much for my roof. If you put two 1/2 lamba (0.5 lambda) dipoles spaced 0.2 lambda (+/- 0.1 lambda) instead +/-0.75 - with 135 degrees delay line, you may get similar result. Saving space on the roof is my priority. If you want more, rather rise antenna as high as possible. For example, I can put up to 13 meters (my roof is 11m + 2m pole = 13m). Then I can get 11.61 dB gain and -3.76 dB F/B ratio. What is more important, by rising antenna 3 meters above value you provided, I can get +3.2 dB at 5 deg. elevation (or -0.2 dBi at 10m height). What you think?