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dx-440 Realistic from 1990 RCA antenna connection

Discussion in 'Home Brew' started by Drwho41963, May 9, 2019.

  1. Drwho41963

    Drwho41963 New Member

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    I have not used this radio for a few years. Now I want to get back to listening and would like to connect an external antenna. The DX-440 has a RCA connection for the external antenna. So this is what II'm thinking about setting up.
    Going to cut 65 feet of 24 gauge speaker cable. Going to pull apart so I have 25 feet on each side that would make a V. I would have 15 feet remaining and attach the end to MFJ 1702c - https://www.hamradio.com/detail.cfm?pid=H0-001006
    Then I would attach a a PL259 adapter to RCA and use a RCA cable to connect to the back of my radio.



    So, I have 2 questions 1) What is the best way to connect the speaker wire to the MFJ 1702c that has a PL259 connection.2) Is it okay to use the RCA cable from MFJ 1702c to the radio with the adapter?

    Any suggestions would be greatly appreciated.
     
    Shadetree Mechanic likes this.

  2. loosecannon

    loosecannon Sr. Member

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    im not sure i understand why you need the antenna switch.

    your easiest solution is to buy a 50 foot roll of speaker wire and a male RCA plug, and just solder the wires to the plug.

    then separate the speaker wires from eachother and hang them up as a horizontal dipole antenna.

    this is just a receiver, and one with an easily overdriven front end at that, so really, just sticking a 20 foot piece of wire in the center of that RCA plug will work just about as well as anything you do.

    while these receivers came with external antenna jacks on them, they were never really designed to be used with an outdoor antenna, and trying to use them with one can actually over power the front end amplifier and you will just hear a garbled mess.

    before you spend any money, try the 20 feet of wire stuck in the RCA jack idea and see if that over powers your receive. you may find out that you need to use something shorter.
    LC
     
    S&W357, Redbeard U812 and binrat like this.
  3. Shadetree Mechanic

    Shadetree Mechanic 808 On The North Side of Dover

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    Welcome to WWDX! I am not familiar with your radio, I'm probably getting ready to learn something.
     
    S&W357 likes this.
  4. Drwho41963

    Drwho41963 New Member

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    What about using this to connect the wire to:
    MOBOREST
    4.0 out of 5 stars 23Reviews
    MOBOREST RCA Cable Audio Adapter, Phono RCA Male Plug to AV Screw Terminal Audio/Video Speaker Wire connectors Solderless Adapter(RCA Male-2pack)
     
  5. loosecannon

    loosecannon Sr. Member

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    that will work just fine.
    LC
     
  6. Drwho41963

    Drwho41963 New Member

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    I have a spool of 24 gauge speaker wire. So I should cut 50 feet and peel the cable apart and attach the ends to the rca plug right? Or would 50 feet be to much?
     
  7. loosecannon

    loosecannon Sr. Member

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    the way i would look at it is that you can always make a wire shorter, so start with the length you have, and if it seems like you cant tune in any stations, or if some close by AM broadcast station is taking over all your frequencies, then try cutting off 10 feet or so.

    the real truth is that it probably won't matter much.
    That receiver is what it is, and having a perfectly tuned delta loop antenna or a wet spaghetti noodle isn't going to change it.

    enjoy that radio for what it is, and if you find that you aren't able to tune in the things you want to listen to, then it's time to look at a real shortwave receiver or a ham radio.
    LC
     
  8. Drwho41963

    Drwho41963 New Member

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    So what short wave radio would you recommend. I would like to stay under 200.00. I would like it to have as, San, lw, me, air and maybe emergency but emergency not vital.
     
  9. Hurricane145

    Hurricane145 Well-Known Member

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    $200 puts you in the used category of communications receivers. Around $400 gets you to some new things like this Alinco receiver.
    https://www.universal-radio.com/catalog/commrxvr/0084.html
    0084.jpg
    Emergency stuff like police and fire requires a different animal, a scanner radio. A lot of it is digital now so scanners can be rather expensive. It's not digital here so I use a Bearcat BCT15X for scanning things such as CB radio, 2 meter and 440 ham radio, all local police and fire, Marine VHF, the local airports and a bunch of other stuff if I want. A bit less than $200 but it does have a steep learning curve to use and program.
    0015.jpg
    https://www.universal-radio.com/catalog/scanners/0015.html
     
    #9 Hurricane145, May 19, 2019 at 8:26 PM
    Last edited: May 19, 2019 at 8:39 PM

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