Is it true that omni directionals are incompatible with helicals?
Jason Hecker says They are compatible. You just have to subtract 3dB from the link budget. So if the helical is 18dB and the omni 5dB, for this sort of connection the helical’s gain in the calculations should be reduced by 3dB to 15dB. Not too shabby. This assumes the omni is linearly polarised. Helicals don’t distinguish between vertically or horizontally polarised antennas. They are seen as one and the same. 3dB is nothing to fret about most of the time. You will loose 3dB in a mere 5m of RG-213. Helicals are great at talking to each other. Yagis can talk to omnis.
