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More Range with Ind...
 
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More Range with Indoor Antenna with iAM Transmitter

 
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Last Post by Anonymous 11 years ago
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 Anonymous
(@Anonymous)
Posts: 0
 

Or should i say ohm's.

Is the F connector for the Talking House 75 ohm or 50 ohms??
Seems to work fine with 75 ohm tv/cable coax but I have never tried it with 50 ohm coax..

Just curious.


 
Posted : 12/09/2015 4:56 pm
 Anonymous
(@Anonymous)
Posts: 0
 

Could you temporarily set up the transmitter outside and check if the range improves? This would tell you if the building is blocking the signal or not.

If it is then there is an old ham's trick to get a wire outside without drilling the house wood. If you can get your window to open and if it is a double hung sash type then get a piece of 2 by 2 lumber, cut to fit across the sill, paint it to be pretty and close the window on it. Now you can drill all the holes you want in your wood.

Neil


 
Posted : 12/09/2015 5:17 pm
 Anonymous
(@Anonymous)
Posts: 0
 

If I could open the window i'd get a flat 75 ohm cabe then close the window on it.  I do remember after Station8 told me about it that a friend of Dad's done that with their satallite TV because they didn't want to drill holes.  So if only I could have done that I'd have it made.  I'd have to put the wire out the window and then to a home made ATU for the Talking House or iAM.  I had a few thoughts too.  They no longer make that ATU but it probably could be duplicated or if not use a 3rd party ATU on it.  The jack is 75 ohms.

 

If only I could find a 3 prong plug outside I'd have tried the trick just to see if the building is blocking it.  Its getting out a little more than 300 Ft which the manual talks about on the wire. Made me think of a better antenna.  Plus if I get a better AM Radio I'll check the range for that.


 
Posted : 12/09/2015 8:32 pm
 Anonymous
(@Anonymous)
Posts: 0
 

I believe it is expecting 50 ohms.  But using 75 ohm cable would not kill your signal if you have to use it (50 ohm would be better).  I've used 75 ohm cable for amateur radio transceivers (expecting 50 ohms) with no ill effects.


 
Posted : 12/09/2015 8:35 pm
 Anonymous
(@Anonymous)
Posts: 0
 

I appreciate that you can't open your window but as the previous owner of a 100+ year old house with this problem I can tell you there is a way to get it open (that doesn't involve throwing bricks) but let's leave that for now.

There is another trick to get an antenna "through" the window. Glue aluminum foil on the inside and the outside of the window pane, connect the tx output to one side, the antenna to the other. This forms a capacitor which will pass RF. I am not sure it will work well at AM frequencies but it is possible.

But, to repeat, try the transmitter outside to determine if getting the antenna outside is the right approach before wasting a lot of time on it.

Neil


 
Posted : 12/09/2015 9:12 pm
 Anonymous
(@Anonymous)
Posts: 0
 

Neil's way of passing a signal without a connection is known as "prophylaxis."

It avoids pregnancy.


 
Posted : 12/09/2015 9:26 pm
 Anonymous
(@Anonymous)
Posts: 0
 

The FCC OET info used to certify the Talking House system states it was tested with 50 ohm coax.


 
Posted : 13/09/2015 5:25 pm
 Anonymous
(@Anonymous)
Posts: 0
 

If there is then maybe , just maybe you'd have a better shot?

Don't know, just throwing some idea's out there. Feeling rough from this insane congestion in my chest, it might have travelled to my head and caused Delirium ..in which case i should check myself into Ward15 lol


 
Posted : 13/09/2015 9:25 pm
 Anonymous
(@Anonymous)
Posts: 0
 

If there is then maybe , just maybe you'd have a better shot?

Don't know, just throwing some idea's out there. Feeling rough from this insane congestion in my chest, it might have travelled to my head and caused Delirium ..in which case i should check myself into Ward15 lol


 
Posted : 13/09/2015 9:26 pm
 Anonymous
(@Anonymous)
Posts: 0
 

If there is then maybe , just maybe you'd have a better shot?

Don't know, just throwing some idea's out there. Feeling rough from this insane congestion in my chest, it might have travelled to my head and caused Delirium ..in which case i should check myself into Ward15 lol


 
Posted : 13/09/2015 9:26 pm
 Anonymous
(@Anonymous)
Posts: 0
 

Interesting, because when I purchased my ATU, it came with 25 feet of 75 ohm coax.


 
Posted : 13/09/2015 9:32 pm
 Anonymous
(@Anonymous)
Posts: 0
 

I'd like to see a range comparison between the 75 ohm wire that does come with it and 50 ohm wire that the transmitter was certified with. Just how much loss would we be talking about? This could be a very interesting experiment.


 
Posted : 13/09/2015 10:04 pm
 Anonymous
(@Anonymous)
Posts: 0
 

Assuming that is correct, then one would have to use RG-58 with Type-F connector(s). Though not street legal, an amateur radio ATU that is capable of operation in the 160 meter band.


 
Posted : 14/09/2015 4:29 am
 Anonymous
(@Anonymous)
Posts: 0
 

TheLegacy,

Do you know where the satellite coax exits the house? Do you know if it is a continuous run from the outlet in your room to the outside of the house?

The talking house is a mono AM transmitter. So if you could put the transmitter outside you could use the coax to send audio to the transmitter. Then you don’t need an ATU and you don’t drill any holes in the house. F to RCA adapters are readily available. The important thing would be protecting the transmitter from the elements, theft, and vandalism. So far, this is the best outdoor enclosure I have found for a talking house: http://www.amazon.com/dp/B005T57PK4/ but it is a bit expensive. A CB antenna base could be mounted to the top with a 102” whip mounted on that.


 
Posted : 14/09/2015 5:26 am
 Anonymous
(@Anonymous)
Posts: 0
 

The jack that comes into my room is hard to find out if the other side of the jack is just outside the wall on the outside of the wall or is the wire going somewhere else and then coming down. I tried to find it Today but the bushes are in the way and there is a very small space between the two houses. What sounded easy to find really is not. Plus the only good place where the antenna would be free of obstructions is in back of the laundry room and that can be seen by the driveway. Surely the landlord would not go for that. If one of our room mates moves out I may be able to get the transmitter on the second floor but it would still be in the house. Since the wire goes an expected 300 Ft to 3,000 Ft I hear it a little more than 300 Ft to a boombox which I don't believe has good AM reception. If I can check a car Radio I'd probably do better. I know I have the Talking House 5 as the model says TH5.0. The manual is iAM. Hopefully the new indoor antenna being built will work.


 
Posted : 15/09/2015 12:20 am
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