Realistic DX-100L Receiving RTTY and Fax

A Realistic DX-100L is made more stable by adding a better heatsink to a transistor in the VFO, and then receives RTTY from DWD Hamburg, and a weather fax from GYA Northwood. users.belgacom.net
Video Rating: 5 / 5

/18 Comments/by
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18 replies
  1. 100thbombgroup
    100thbombgroup says:

    Thanks for loving my radio lol. I hope you’re having fun with the DX-100L.
    Thanks for the upgrade, changing the heatsink. I owe you an other pint : ) .
    Cheers.
    B….

    Reply
  2. miserableoldcunt
    miserableoldcunt says:

    how long after powering up did the radio take to stabilise itself mate? , it didn’t look to take very long at all. a marvellous job, well played.

    Reply
  3. Hanglands
    Hanglands says:

    No worries mate, it took only a few moments to do. Having fun using it. I think I’ll try the weather fax again after dark one night, will have better reception then.

    Reply
  4. Hanglands
    Hanglands says:

    Thanks mate. Well, when you see the whole screen with the waterfall effect on the spectral display, the time it takes to go from the top of the screen to the bottom is 9 minutes, so yes, the warm up time was about 3 minutes to settle down. Curiously, the 100L here used to drift about 500Hz in one direction and then drift back the opposite way!

    Reply
  9. Mrweswtf
    Mrweswtf says:

    Great, this makes my radio even more fun.
    I own the dx-100 but it does not have the “L” in the model number.
    Do you know the difference, Google isn’t helping.

    Reply
  10. Hanglands
    Hanglands says:

    The DX100 tunes down to 550kHz. The DX-100L goes down to 150kHz. Thats the only diference I can fathom. So, I suppose the ‘L’ means ‘longwave’ then.

    Reply
  11. FelixTheHouseFreak
    FelixTheHouseFreak says:

    Hey wonderful video, very informative!

    I have the same radio except mine doesnt have the L in the model number. I will attempt this modification.

    Can you offer any advice as to were i can read up more on this type of coded broadcast? What terms would i use to search for information about this on google?

    Again thanks for the great video!

    Reply
  12. Hanglands
    Hanglands says:

    @FelixTheHouseFreak Hi there, thansk for watching and for the great comment. I’ll PM you some links tomorrow, but for now you can try searching on “radio teletype basics” or “weatherfax”, “hffax” etc. I think the only difference between the 100 and the 100L is the 100 tunes down to 520kHz and the 100L goes down to 150kHz.

    Reply
  13. Hanglands
    Hanglands says:

    @nay27uk Hi, Im afraid I have no idea where you could get a replacement, without salvaging one from a dead radio, an elastic band may work if you get the right size. You wont need to make any modifications to decode this stuff, just turn the volume down low, and connect an audio cable between the headphone out on the radio to line-in on your soundcard. It might be worth your while just adding an improvised heatsink as shown in this video to improve stability though.

    Reply
  16. Hanglands
    Hanglands says:

    @petchharrison Hi, thanks for watching. Ive never used a DX-200, so cant say for sure, but from what Ive read about them its important to give plenty of warm up time. If you can find a relevant transistor in the VFO stage, a bit of extra cooling wont hurt it.

    Reply
  17. GottaGoFishin2
    GottaGoFishin2 says:

    Nice video. I’ve been considering doing that mod and a couple of others to my DX100. Looks like it will be well worth the short amount of time required to do it.

    Reply

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