Two antennas to one radio

[kc8zdf]

I was playing around with the hobby yesterday and thought I would try putting two identical comtelco 3db gain antennas that are 800mhz together with a bnc t connector. Well I did it and put the antennas on the roof about a 2 feet apart on my truck. Both antennas have the same length of coax and both antennas are the same freq. This kinda sounds like a coax phase as far as having everything the same but I'm only receiving, I listen to the local digital system and what I'm thinking is that since I have two antennas that are receiving there will be less interuption when someone is talking. Well so far I don't see any signal loss from having the two antennas bnc t together. I have noticed less interuption. Has anyone else done this before and have had better results too??

The other antenna I was using for 800mhz scanner by itself is a comtelco 5db gain 800mhz. This works well too but had more interuptions when someone was talking. What I like to call these interuptions is the system going digital or schelching.

This is probley against all the physics of antenna theroies and how they work but to me it seems to be working better then just one. I gues the best way to put it would be like if one antenna see loss of signal there is another that is still fine.

Anyway just having fun with hobby and antennas. Let me know if anyone else has done this and tell me if it is against all physics.

73, kc8zdf

 

[Don_Burke]

Since the antennas are spaced more than a wavelength apart, you will find signals add at some azimuths and cancel at others. There will be quite a few lobes and notches in this pattern.

The bottom line is that if it works, it works.

I would not draw any far-reaching conclusions.

I was playing around with the hobby yesterday and thought I would try putting two identical comtelco 3db gain antennas that are 800mhz together with a bnc t connector. Well I did it and put the antennas on the roof about a 2 feet apart on my truck. Both antennas have the same length of coax and both antennas are the same freq. This kinda sounds like a coax phase as far as having everything the same but I'm only receiving, I listen to the local digital system and what I'm thinking is that since I have two antennas that are receiving there will be less interuption when someone is talking. Well so far I don't see any signal loss from having the two antennas bnc t together. I have noticed less interuption. Has anyone else done this before and have had better results too??

The other antenna I was using for 800mhz scanner by itself is a comtelco 5db gain 800mhz. This works well too but had more interuptions when someone was talking. What I like to call these interuptions is the system going digital or schelching.

This is probley against all the physics of antenna theroies and how they work but to me it seems to be working better then just one. I gues the best way to put it would be like if one antenna see loss of signal there is another that is still fine.

Anyway just having fun with hobby and antennas. Let me know if anyone else has done this and tell me if it is against all physics.

73, kc8zdf

 

[kc8zdf]

O very well. Thanks for the reply and yeah I see what you mean for sure. Yes it seems to work better then just one antenna for the 800mhz that I listen to. But mostly just playing around to see what happens but I think I will leave it this way for now and see how it progresses. Thanks for the reply and anybody else viewing this thread may want to try it for fun just to see if it works better for them too. Thanks guys.

73, Kc8zdf