AM Modulators

Discussion in 'UK Motorcycles' started by sweller, Sep 20, 2009.

  1. sweller

    sweller Guest

    Welcome to the wonderful and frightening world of electronics - something
    I know very little about.

    Whilst idly browsing solutions for the car radio problem I found hard
    wired FM modulators. Devices that allow MP3s etc to be hard wired into
    the radio via the aerial:
    http://www.maplin.co.uk/Free_UK_Delivery/FM_Modulator_44128/FM_Modulator_44128.htm

    The problem with this is classic car radios with FM are pretty rare [1],
    those that are positive earth rarer still (changing the polarity of the
    Jag is a pain (clock, fuel pumps and believe it or not the fucking
    battery).

    So, is it possible/easy/cheap to build a device that works on the Medium
    or Long Wave bands?

    Any volunteers?



    [1] ...and pricey
    http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=270452694254
     
    sweller, Sep 20, 2009
    #1
    1. Advertisements

  2. sweller

    Guest Guest

    if you can solder its dead easy! only need about 10 componants. Here is a
    site. your best building a crystal version, your stuck on 1 frequency but
    very stable when warmed up. your hardest job will be mixing the 2 channel
    stereo into a mono signal for the AM RX....thinks again... a get around
    would be to make your mp files mono, and just TX 1 side of the audio. all
    the best.

    http://lowpowerradio.blogspot.com/
     
    Guest, Sep 20, 2009
    #2
    1. Advertisements

  3. sweller

    Guest Guest

    sorry RX = receive.
    TX = transmit
     
    Guest, Sep 20, 2009
    #3
  4. sweller

    Alex Ferrier Guest

    sweller wrote:
    --
    Alex
    BMW R1150GS MZ Saxon 301
    DIAABTCOD#3 MSWF#4 UKRMFBC#6 Ibw#35 BOB#8
    Windy's "little soldier"
    Bearing in mind that they are illegal in the UK.

    http://www.vintage-radio.com/reviews/transmitters.html1
     
    Alex Ferrier, Sep 20, 2009
    #4
  5. sweller

    Guest Guest

    ( Bearing in mind that they are illegal in the UK.)

    The chances of OFCOM doing anything about it are minuscule.
    They completely ignore 6.6 pirates, radio hams using massive power levils
    and free band CB'ers all blatantly ignoring the BR68 mag the rules of they
    are 'supposed to stick too.
    If you knock up a little AM modulator stick a low pass filter on it, so you
    don't squirt harmonics all over HF and, and , well if they getchya, I'd do
    the lottery the same day if I were you!.... You got more chance of winning
    that, than OFCOM / DTI / Busby
    come lookin for you. Nowdays anyhow, a bit back they were bothered. Maybe if
    you build an FM set and start doing adverts you might get a visit, they
    wan't the brass coins see, for the add's.
     
    Guest, Sep 20, 2009
    #5
  6. sweller

    Alex Ferrier Guest

    Nonetheless, worth mentioning, don't you think?

    Please snip signatures in your replies, thanks.
     
    Alex Ferrier, Sep 20, 2009
    #6
  7. Absolutely nothing...
     
    Andrew Halliwell, Sep 20, 2009
    #7
  8. Don't bother.

    Open up the radio and link into the audio output stage with a connection
    just before the volume control. A lead hanging out the front may pick up
    ignition click so fit a "brake contact on insert" socket and plug in
    when you want to play your mp3 player.
     
    Mick Whittingham, Sep 20, 2009
    #8
  9. sweller

    Higgins Guest

    Alex Ferrier wrote:
    Maybe he had too many to choose from and got confused.
     
    Higgins, Sep 20, 2009
    #9
    1. Advertisements

Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Similar Threads
Loading...