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unclemack

Speaker wire as fm antenna?

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I've connected my Pioneer tuner using some standard speaker wire as an antenna. Only getting half strength signal so not ideal. This may be due to my location but I would have thought the abc would be pretty good everywhere. So I thought maybe the speaker wire might be a factor. Any suggestions? Also, I've connected it like this. This also may be wrong. Any advice would be welcome. Cheers. M4317ffda4aace158cafc252a6b1bee76.jpg

 

 

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  • Try a coat hanger, and you may get the full strength.....:P
Edited by Addicted to music

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If you have a TV antenna installed and you  do not have reception problems , then I would suggest that a splitter box that has an FM co-ax outlet be fitted and  that you use a 75 ohm cable  to the Pioneer tuner. Otherwise you may have to have a rooftop antenna  setup if you happen to be in a weak reception area. What I have missed in your photo ,is that the figure 8 cable (speaker wire) has one end going to ground. It should be to the 300 Ohm terminal ,next to  .'BAL'.

Edited by VanArn

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If you just want to get ABC FM with speaker wire you need to adjust the length to be (I think) quarter wavelength of the frequency in question. Try a longer wire, and if no good, then try a shorter wire.

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With that type of antenna/feeder you should be using the two 300(ohm symbol)BAL thumbscrew terminals. My understanding is that the GND terminal is for the AM section. So move the left wire along one terminal.

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The correct way to use the speaker wire, is to connect between the 300 Ohm balanced connections. NOT one 300 Ohm point and earth. Treat the cable like a 'T'. Keep the wire joined for (say) 1 Metre, then spread it out, horizontally, about 600mm on each arm of the T. It's not critical.  

 

Speaker cable is not really 300 Ohm characteristic impedance, but it will do in a pinch.

 

This is probably a little better:

 

FWUQQC0GXZXTOTD.LARGE.jpg

Edited by Zaphod Beeblebrox

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@Zaphod Beeblebrox Is correct. I have used speaker wire in the past configured like that and it worked pretty good. Did no necessarily have the width dimension as wide but it worked.

 

And as said in a prior post do not used GND, both wires go on the 300 ohm terminals for FM antenna.

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I use a 75-ohm antenna wire from my tuner to a splitter plugged into my TV antenna. 

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On 25/06/2017 at 10:57 AM, VanArn said:

If you have a TV antenna installed and you  do not have reception problems , then I would suggest that a splitter box that has an FM co-ax outlet be fitted and  that you use a 75 ohm cable  to the Pioneer tuner. Otherwise you may have to have a rooftop antenna  setup if you happen to be in a weak reception area. What I have missed in your photo ,is that the figure 8 cable (speaker wire) has one end going to ground. It should be to the 300 Ohm terminal ,next to  .'BAL'.

 

Modern UHF antennas block out most of the over air radio signal, it wont work that way. You need a VHF antenna, or better yet a Yagi on your roof, properly aligned, this will work better than a dipole pointed every which way.

 

You can  find the polerisation for your antenna on the ABC website http://reception.abc.net.au/Reception.aspx. You can try the old fashioned rabbit ear antennas if you have a good signal strength in your area, adjust appropriately until you find a signal, otherwise go for the on-roof solution.

 

Speaker wire will not really handle a 300ohm load, you should use AV coaxial cable and connect it to a proper antenna, failing that, you can get some 300ohm cable and an antenna off a place like fleabay.

Edited by Roumelio.

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On 7/3/2017 at 0:34 PM, audiofeline said:

I use a 75-ohm antenna wire from my tuner to a splitter plugged into my TV antenna. 

 

The majority of TV antennae are either not 'cut' for the FM band. Therefore, they will not perform optimally for FM reception. You would be better off using a dedicated FM antenna for this purpose.

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2 hours ago, Zaphod Beeblebrox said:

 

The majority of TV antennae are either not 'cut' for the FM band. Therefore, they will not perform optimally for FM reception. You would be better off using a dedicated FM antenna for this purpose.

 

Experience shows that any 75ohm outdoor antenna will out perform the indoor 300Ohm ribbons especially for properties with steel roofs.  

from experience I can never get a 300 ohm optimised to to have reception like an outdoor TV antenna but that's just me.

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3 hours ago, Addicted to music said:

 

Experience shows that any 75ohm outdoor antenna will out perform the indoor 300Ohm ribbons especially for properties with steel roofs.  

from experience I can never get a 300 ohm optimised to to have reception like an outdoor TV antenna but that's just me.

 

In some locations, that is correct. In ALL locations, a proper FM antenna will always work best. And those goes double for those who use a TV antenna amplifier. Antenna amplifiers (at least the good ones) always employ an FM band filter to alleviate interference with Channel 2 VHF.

Edited by Zaphod Beeblebrox

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6 hours ago, Zaphod Beeblebrox said:

The majority of TV antennae are either not 'cut' for the FM band. Therefore, they will not perform optimally for FM reception. You would be better off using a dedicated FM antenna for this purpose.

Thanks, I did not know this.  I will try the 300ohm ribbon at some stage and compare.  I rarely use my tuner anyway, so it's not a huge problem and my reception is OK.  But I do like extracting the best possible sound from what I have, so I will experiment!

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I sourced some ribbon antenna for my old sansui tuner from eBay, works great.

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