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Old 11-08-2006, 02:27 AM   #1
me_rubin
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Can One Radio hook up to two Antenna's?
 
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Default Can One Radio hook up to two Antenna's?

This question is not specific to the Stiletto, but it is an issue with my stiletto.

At work, I have the radio connected from my inside office to an antenna that runs to the window Sill in the corner of the building.

The issue is the radio receives for several hours then the signal drops off. I have to go over to the window sill and move the antenna over about 6 inches from the south facing side of the building to the west facing side. I've tried both the home dock and car dock antennas and this is still an issue.

Is there anything that will allow me to conntect two antennas together?
This would give it better coverage on both sides of the building and stop this constant move?

I know the best answer would be to get an antenna on the roof, but since we don't own the building that is not an option. Also internet is out because the URL is blocked by corporate IT.

I'm thinking if I could combine the signals from both antennas this may be a solution.

Any one know if you can do this?
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Old 11-08-2006, 08:23 PM   #2
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I've seen this question asked a few times before on this forum over the years. AFAIK, nobody has done it.. Or if they have, they never lived to tell about it

I can see a couple of problems... The antennas contain amplifiers that draw power from the receiver. (5 volts gets sent down the antenna wire). Two antennas might draw too much current and overload the power source inside the radio.

Sirius receivers have some sort of circuitry built in that lets them know when a proper antenna is attached. If they don't see the right signals coming down the antenna wire, or the right resistance they flash a message "Antenna Not Detected"... Adding a second antenna might change the resistance seen at the antenna input and trigger this message.

Finally... Microwaves are a bit tricky. Picking the signal up from different places could cause the signals to arrive at the receiver out of phase. Out of phase signals can cancel each other out... You could wind up with a net loss in signal strength.

Of course, I'm just thinking out loud here I don't know for sure if anything I've said holds true.. Perhaps I'll try some day......
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Old 11-09-2006, 11:13 AM   #3
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I think JWT is correct and covered the 2 main issues
power to antenna and antenna dection
while I have never tried it, I would bet that it wont detect the antenna
if I had a y adapter I would try it .. not saying you should but I have a lot
of antennas and it wouldnt hurt me to blow one or two

of course you can always try it and see .. it will either work or not or break

your best bet would be to use a switch and switch between the antennas
but that is going to be a hassle

..Dale
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Old 11-09-2006, 11:40 AM   #4
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It's something I've thought about. I need the antenna on the west of my house to face the satellite, but the repeater is east. I've only had a couple of drops over the last few months (maybe 3 over 4 months?) but they've been short enough that that I never even had a chance to switch to recorded tunes.
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Old 11-10-2006, 12:23 AM   #5
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I had an electric shop make up an antenna (T) so I could connect two antennas together and it is working correctly, however I have only put it to test inside my cars windshield and it appears to help with antenna gain a little.

If I had to do it from oneside of a building to the other I don't have any idea what would happen. The antenna does register on my stilletto and I see no problem for now. I remember the electrician at the shop say that there was no issue with power and it should work perfectly. I hope this helps everyone...
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Old 11-10-2006, 10:12 AM   #6
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Quote:
Originally Posted by knottmilk
I had an electric shop make up an antenna (T) so I could connect two antennas together and it is working correctly, however I have only put it to test inside my cars windshield and it appears to help with antenna gain a little.
Ah.. Finally. Someone's done it !

That's good to know. I won't have to guess anymore
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Old 11-10-2006, 05:29 PM   #7
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FYI
I paid an electric shop with the labor T coupler and a little lead wire a grand total of $30. Also got informed about it.
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