Hey all! I built myself a coaxial collinear antenna (to the instructions from balarad.net), with a quarter lambda stub as a filter. It has been working perfectly for a few days now.
I wanted to try and boost my signal a bit more by adding an amp (the one on the picture) that I connect to the T adapter between the antenna and the quarter lambda stub using a F-F male bridge that has the same impedance like the coax I used for all the lines. You can see the bridge on the picture too. Now, as soon as I put the amp in the line, I completely lose all reception whatsoever. Reconnecting the system to exclude the amp brings things back to normal. I put the amp so that 'in' is coming from the antenna and 'out' is going into the T adapter. The photo may depict a different configuration, so just to make that clear :-)
Any idea why this might be occuring and how to solve it? I read around that having an amp might be overloading the dongle, but I thought the quarter lambda stub should take care of most of the large RFI like the GSM bands?
Thanks a lot! Cheers!
I wanted to try and boost my signal a bit more by adding an amp (the one on the picture) that I connect to the T adapter between the antenna and the quarter lambda stub using a F-F male bridge that has the same impedance like the coax I used for all the lines. You can see the bridge on the picture too. Now, as soon as I put the amp in the line, I completely lose all reception whatsoever. Reconnecting the system to exclude the amp brings things back to normal. I put the amp so that 'in' is coming from the antenna and 'out' is going into the T adapter. The photo may depict a different configuration, so just to make that clear :-)
Any idea why this might be occuring and how to solve it? I read around that having an amp might be overloading the dongle, but I thought the quarter lambda stub should take care of most of the large RFI like the GSM bands?
Thanks a lot! Cheers!
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