What antenna can I use???

Discussion in 'Tuners' started by djnagle, Jun 29, 2018.

  1. djnagle

    djnagle Lunatic Member

    Messages:
    11,906
    Location:
    Albuquerque, New Mexico
    Hi guys, I just picked up a Yamaha RX-395 receiver and the connection for the FM antenna looks like a co-axial but without the threads - so a push on I guess.

    Here is the problem. I don't know if I need 75ohms or 300ohms. I see the flat "T" wires but it has just wire at the end. I see the 300ohms push on with the two screws. HELP
     

     

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  2. amptramp

    amptramp Active Member

    Messages:
    389
    Location:
    Mississauga Ontario Canada
    Coax with or without threads is usually 75 ohms. A twin-lead antenna is usually 300 ohms. To use the antenna on 75 ohms, you use a matching transformer. They often look like this:

    [​IMG]
     
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  3. sinewaver

    sinewaver Active Member

    Messages:
    312
    Location:
    Northeast PA
    Somebody made a push-on that took twin lead. simple little thing. I have one (in use) I'll look at it and see if there's a brand.
    No brand, just Malaysia, 75 ohms. Might have been a Radio Shack part. Try some site that has 300 / 75 stuff. don't overlook that it isn't just for audio. TV would have used them as well. Antenna manufactures ? Good luck.
     
  4. djnagle

    djnagle Lunatic Member

    Messages:
    11,906
    Location:
    Albuquerque, New Mexico
    Thanks guys. Im gunna run down to Rat Shak and see what the have.

    Ps. I have a 10 foot length of cable coax and i tried to push it on the receiver nob. It wouldnt go on but it made the connection and sounded great.
     
  5. mhardy6647

    mhardy6647 AK Subscriber Subscriber

    Messages:
    51,968
    Many of the Yamaha components here have PAL fittings for coaxial 75 ohm input. R/S used to sell PAL to F (and vice versa) adaptors. PartsExpress has one gender, but not the other (if memory serves). I am sure Amazon or someone can come through.

    Here's a borrowed photo of one for comparison:

    [​IMG]
    source: https://www.audioasylum.com/cgi/vt.mpl?f=tuner&m=15513

    PAL to "F" adaptor (from the same AA link):
    [​IMG]
     
  6. mhardy6647

    mhardy6647 AK Subscriber Subscriber

    Messages:
    51,968

     

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  7. djnagle

    djnagle Lunatic Member

    Messages:
    11,906
    Location:
    Albuquerque, New Mexico
    After taking in all these ideas and making plans i looked on Amazon and found a stock yamaha RX395 FM antenna for 6 bucks. No shipping because i have Prime.
     
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  8. djnagle

    djnagle Lunatic Member

    Messages:
    11,906
    Location:
    Albuquerque, New Mexico
    I got the antenna Monday and hooked it up. This turner sounds great. Very good for a garage!!! Next up is installing an in-wall air conditioner.
     
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  9. dewdude

    dewdude I fix stuff.

    Messages:
    3,017
    Location:
    Manassas, VA
    The funny thing about every tuner I've seen with 300 ohm had a balun inside since tank circuits are inherently unbalanced.
     
  10. djnagle

    djnagle Lunatic Member

    Messages:
    11,906
    Location:
    Albuquerque, New Mexico
    Thanks for that Dew but I have no idea what said. What is a ballon and a tank circuit?
     
  11. rcs16

    rcs16 Super Member

    Messages:
    3,656
    Location:
    Baldwin, Ontario, Canada
    I bought one of those adapters pictured above, it is not the correct part as it is a RCA to F adapter
    Someone wrote that Rat Shack does have one but i have not tried it. I'd have to look for the part number.
     

     

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