FM antenna, help needed - diyAudio
Go Back   Home > Forums > General Interest > Everything Else

Everything Else Anything related to audio / video / electronics etc) BUT remember- we have many new forums where your thread may now fit! .... Parts, Equipment & Tools, Construction Tips, Software Tools......

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 25th January 2014, 08:54 PM   #1
diyAudio Member
 
Join Date: Jan 2014
Default FM antenna, help needed

I'm looking for some help with regards to a simple indoor FM antenna I plan on making. I live in an appartment and would like to be able to receive my favorite station on 100.9 Mhz. The station broadcasts from Brussels in Belgium which is 125 Km (78 Mile) from where I live. I have no problem picking it up locally in my car, but I get no signal with my Marantz SR4320 receiver. I currently use a simple 'T' type antenna which is attached to the back of a cabinet.

Does anyone have some tips on how to construct an antenna specifically for my problem?

P.s. I'm a complete novice when it comes to DIY audio, so forgive me my ignorance
  Reply With Quote
Old 25th January 2014, 09:24 PM   #2
diyAudio Member
 
Richard Ellis's Avatar
 
Join Date: Sep 2006
Location: Mar del Plata, a BIG seasonal getaway city, can see the Ocean from our residence.
The antenna you currently have on the back of your Marantz is a simple dipole, it seems odd that your car can pick up this station at 78 miles distant & your Marantz can't. Perhaps the terrain in your neighborhood is "at fault". If the terrain is convoluted with gentle hills & valleys your residence may be in a 'null' area, making reception a hit or miss affair.
Can you pick up this station in your car while parked close to your residence?
I'll assume your Marantz is picking up some stations but just not your preferred station of choice.
Of course you can erect an external antenna at your residence that has enough 'power' to draw in stations from at least 100 miles distant but if the terrain IS problematical & "low lying" you wouldn't get the full 100+ miles distant stations. Look up Yagi-Uda antennas & "multi-element" antennas.
It maybe a pain to do this but it's not at all that expensive but you will gain a full FMs dial worth of stations.
While living in Portland Oregon, I put up a Ten-element directional antenna to pick up a favorite station at the University of Oregon in Eugene Oregon almost exactly 100 miles away, It was as if it was right next-door, perfect reception.


_________________________________________________R ick...........

Last edited by Richard Ellis; 25th January 2014 at 09:25 PM. Reason: typo
  Reply With Quote
Old 25th January 2014, 11:12 PM   #3
DUG is offline DUG  Canada
diyAudio Member
 
Join Date: Jan 2003
Location: mississauga ontario canada
The top of the "T" antenna should be vertical. (can be made with 300ohm flat lead ant cable)
__
| |
| |
| |
| -------
| -------
| |
| |
|_|

And the station should be off the flat side.

__________________
Doug We are all learning...we can all help
"You can't stop the signal, Mal. Everything goes somewhere..."
  Reply With Quote
Old 25th January 2014, 11:22 PM   #4
diyAudio Member
 
Join Date: Jan 2014
Quote:
Originally Posted by Richard Ellis View Post
Can you pick up this station in your car while parked close to your residence?
Yes I can, that is why I find it a bit odd.
  Reply With Quote
Old 25th January 2014, 11:29 PM   #5
diyAudio Member
 
Join Date: Jan 2014
Quote:
Originally Posted by DUG View Post
The top of the "T" antenna should be vertical.
It is vertical but not fully stretched. It's made from very thin copper wire which has a protective jacket, much like speaker wire. In other words, one end points to the ceiling, the other to the floor yet they are not fully streched. Does this matter?
  Reply With Quote
Old 25th January 2014, 11:44 PM   #6
DUG is offline DUG  Canada
diyAudio Member
 
Join Date: Jan 2003
Location: mississauga ontario canada
Quote:
Originally Posted by JuergenF View Post
It is vertical but not fully stretched. It's made from very thin copper wire which has a protective jacket, much like speaker wire. In other words, one end points to the ceiling, the other to the floor yet they are not fully streched. Does this matter?
In RF everything matters, but is not always too significant.

You will have better performance if the antenna is built the way I drew it...called a folded dipole.

There will be information on the 'net for making a folded dipole from 300 ohm TV antenna flat lead...probably better than what you have.

Although if you can put up an antenna as Richard suggested then you will get MUCH better performance.

Probably information on that build on the 'net as well.

__________________
Doug We are all learning...we can all help
"You can't stop the signal, Mal. Everything goes somewhere..."
  Reply With Quote
Old 26th January 2014, 12:50 AM   #7
diyAudio Member
 
Speedskater's Avatar
 
Join Date: Sep 2002
Location: Lakewood, Ohio
Everything anyone needs to know about FM antennas.

88108 MHz
__________________
Kevin
  Reply With Quote
Old 26th January 2014, 02:42 PM   #8
DUG is offline DUG  Canada
diyAudio Member
 
Join Date: Jan 2003
Location: mississauga ontario canada
Quote:
Originally Posted by Speedskater View Post
Everything anyone needs to know about FM antennas.

88108 MHz
Excellent site...now bookmarked.
__________________
Doug We are all learning...we can all help
"You can't stop the signal, Mal. Everything goes somewhere..."
  Reply With Quote
Old 28th January 2014, 07:45 AM   #9
diyAudio Member
 
Tube_Dude's Avatar
 
Join Date: Mar 2002
Location: Aveiro-Portugal
Quote:
Originally Posted by JuergenF View Post
It is vertical but not fully stretched. It's made from very thin copper wire which has a protective jacket, much like speaker wire. In other words, one end points to the ceiling, the other to the floor yet they are not fully streched. Does this matter?
You must put it horizontally. In Europe, in opposition to American broadcasting stations, is used horizontal polarization, that's why, in portable FM radios we get better reception with the aerial out of vertical position and almost horizontal...
__________________
Jorge
  Reply With Quote
Old 28th January 2014, 11:32 AM   #10
DF96 is offline DF96  England
diyAudio Member
 
Join Date: May 2007
It depends on where in Europe. Some countries (e.g. UK) use mixed or circular polarisation too. This gives better car and portable reception, at the cost of an increased risk of multipath on proper fixed installations.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
FM antenna help tweekend Everything Else 10 29th January 2013 12:22 AM
Best FM antenna...... JoeDJ Everything Else 12 25th March 2011 10:26 PM
FM antenna coldcathode Everything Else 6 16th June 2009 05:20 PM
FM Antenna jaya000 Car Audio 5 27th January 2007 04:40 AM
AM/FM Antenna amplifier schematic needed hifi Everything Else 0 25th October 2002 05:03 PM


New To Site? Need Help?

All times are GMT. The time now is 08:41 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2