Analog radio

First, what is better for indoor fm radio antenna 50/75/ 300 ohm
I hear that 300 ohm improve sound quality, the 300 OHM FM antenna

Answers

  • pitdogg2
    pitdogg2 Posts: 20,805
    You can get a balun to go from 75 ohm to 300 ohm and decide for yourself.

    It really all depends on what you tuner is set up for. Older tuners were only 300ohm later they had both inputs.
  • SeleniumFalcon
    SeleniumFalcon Posts: 2,133
    edited April 1
    It's going to depend upon what antenna you're using. The idea is to match the antenna's impedance (at radio frequencies) with the FM tuner's input stage. For example if it is a simple FM antenna that came with classic receivers then that is a 300 ohm impedance antenna which would be connected to the 300 ohm antenna connection on the receiver. If, on the other hand, it was an outdoor FM antenna most owners would use a 300 to 75 ohm converter on the antenna and 75 ohm coaxial cable to the tuner and connect to the 75 ohm input on the receiver.
  • mhardy6647
    mhardy6647 Posts: 29,760
    Not sure if the input on any particular FM tuner "front end" is natively 75 ohm or 300 ohm.
    Every added impedance matching device (i.e., 'balun' = balanced/unbalanced transformer) causes loss of signal. The less 'connections' of any sort, the better (at least in theory). :)

    a priori it's not really likely to make a big difference, though.
    a prioriI like 75 ohm unbalanced for noise rejection, but I have used both, with various flavors of indoor & outdoor antennae :p

    Antennae are interesting things: there's science, art, and magic involved in the design and implementation of an antenna. :)
  • SeleniumFalcon
    SeleniumFalcon Posts: 2,133
    And don't forget the "skin effect"!
  • mhardy6647
    mhardy6647 Posts: 29,760
    And don't forget the "skin effect"!

    Ve don't forget ze skin effekt!

    yh88ybndknsy.png

    ;)
  • pitdogg2
    pitdogg2 Posts: 20,805
    mhardy6647 wrote: »
    Antennae are interesting things: there's science, art, and magic involved in the design and implementation of an antenna. :)

    fixed it fer ya

  • henryroy57
    henryroy57 Posts: 2
    Hello guys, I am interested in learning about electronics because of my passion. As of now, I am studying matric at Okara school, but I plan on becoming an electrical engineer in the future. That's why I am here for learning about it.
  • mhardy6647
    mhardy6647 Posts: 29,760
    henryroy57 wrote: »
    Hello guys, I am interested in learning about electronics because of my passion. As of now, I am studying matric at Okara school, but I plan on becoming an electrical engineer in the future. That's why I am here for learning about it.

    If you're not a bot or spammer -- howdy & welcome.
    I dont' know what matric or Okara are. You may find other/better sites for "learning about EE", though.
  • henryroy57
    henryroy57 Posts: 2
    henryroy57 wrote: »
    Hello guys, I am interested in learning about electronics because of my passion. As of now, I am studying matric at Okara school, but I plan on becoming an electrical engineer in the future. That's why I am here for learning about it.

    It's ok I solved my problem but thanks for the reply.
  • Nightfall
    Nightfall Posts: 9,823
    You never discussed any problem.
    afterburnt wrote: »
    They didn't speak a word of English, they were from South Carolina.

    Village Idiot of Club Polk
  • txcoastal1
    txcoastal1 Posts: 12,202
    mhardy6647 wrote: »
    henryroy57 wrote: »
    Hello guys, I am interested in learning about electronics because of my passion. As of now, I am studying matric at Okara school, but I plan on becoming an electrical engineer in the future. That's why I am here for learning about it.

    If you're not a bot or spammer -- howdy & welcome.
    I dont' know what matric or Okara are. You may find other/better sites for "learning about EE", though.

    Not sure what matric is either...but fried okara with shicken and mash taters is the bomb...just sayin'
    2-channel: Modwright KWI-200 Integrated, Dynaudio C1-II Signatures
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    erat interfectorem cesar et **** dictatorem dicere a
  • skrol
    skrol Posts: 3,144
    henryroy57 wrote: »
    henryroy57 wrote: »
    Hello guys, I am interested in learning about electronics because of my passion. As of now, I am studying matric at Okara school, but I plan on becoming an electrical engineer in the future. That's why I am here for learning about it.

    It's ok I solved my problem but thanks for the reply.

    Someone's in denial.
    Stan

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  • jbreezy5
    jbreezy5 Posts: 489
    Nightfall wrote: »
    You never discussed any problem.

    That is the problem.

    Glad we were able to help.