Does a VCR coax cable transmit a stereo signal?

Discussion in 'Amateur Video Production' started by Doc, Jan 8, 2006.

  1. Doc

    Doc Guest

    I made a DVD off a VHS tape of the Faith Hill special that was on about
    a week ago, and notice that the sound is obviously mono, verified by
    looking at the sound track in Soundforge. Both L & R are clearly
    identical..

    I taped it with a stereo VCR via an antenna going through the coax
    input, good strong signal going through a 12db amplifier box. I was
    under the impression that all modern tv shows are broadcast in stereo,
    is this correct? Doesn't a coax cable pass a stereo signal?

    Thanks
     
    Doc, Jan 8, 2006
    #1
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  2. Yes coax cable passes stereo broadcast signals.
    Yes many (most?) TV shows are broadcast in stereo.
    No, not all "stereo VCRs" have stereo *tuners*.
     
    Richard Crowley, Jan 9, 2006
    #2
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  3. Doc

    GregS Guest

    I don't think many have stereo modulators, if any.

    greg
     
    GregS, Jan 9, 2006
    #3
  4. Doc

    xmradio Guest

    The quality is around 96kbs for the stereo sound/junk...

    xman
     
    xmradio, Jan 9, 2006
    #4
  5. That's the key ... to get stereo out of a VCR
    playing back a tape, you have to use the VCR's
    audio outputs. They don't send out stereo on
    the RF output because the patent owners want to
    much money. If the patent would expire before
    NTSC does, and before RF modulators, overnight all recorders would
    output stereo on their RF outputs. The cost is
    very low.

    Doug McDonald
     
    Doug McDonald, Jan 9, 2006
    #5
  6. Doc

    Doc Guest

    Ah so...perhaps that's the issue. I'll try hooking up a different VCR and
    see if I get different results. For some reason, I just never noticed before
    that I wasn't getting a true stereo field out of the speakers.
     
    Doc, Jan 10, 2006
    #6
  7. Doc

    Doc Guest

    Yup, that was it. Another, newer VCR gives a stereo field through the coax
    connection. The original VCR in question is an older model, though was
    expensive when new. It does play tapes in stereo, but definitely putting out
    mono via the coax connection.
     
    Doc, Jan 10, 2006
    #7
  8. Doc

    GMAN Guest

    Thats not the problem he is having at all. Even though his MTS stereo capable
    VCR has a tuner that receives and records the MTS stereo audio to video tape,
    the audio on the tape is not stored using the same method that was received
    thru the air. Most consumer video devices do not have a stereo rf modulater
    built in to the unit to resend a MTS stereo signal via coax. The original
    poster should have hooked his vcr up thru either composit or Y/C (S-Video)
    jacks and recorded the show that way.
     
    GMAN, Jan 11, 2006
    #8
  9. Doc

    GMAN Guest

    By coax, are you confusing the composite video/audio cables (Red, White and
    yellow cables), with RF coax (Black antenna coax)?
     
    GMAN, Jan 11, 2006
    #9
  10. The OP posted (many hours ago) that he resolved the
    problem and agreed with the original diagnosis. Perhaps
    you missed it?
    Would you like to clarify that, or do you want to remain
    the only one who understands it?
    And most of the older and/or cheaper ones didn't have
    stereo tuners, either. I have a couple of them here in the
    room with me as I type this.
    You can clarify this one while you're trying the previous
    statement. Use of baseband video (whether composite or
    Y/C has no effect on the audio.

    Unless you meant to say that the OP should have used an
    external *stereo* tuner and send baseband audio and video
    into the VCR. (Which is what he already said he arrived
    at as a solution.)
     
    Richard Crowley, Jan 11, 2006
    #10
  11. Doc

    GregS Guest

    And, it might be nice to know the model that has a stereo modulator, in case
    there are others wanting to do this.
    If it says HiFi, then it should be stereo. There were very few stereo non HiFi
    models. I would guess, even the old Sony Betas that sold
    for over a thousand dollars, didn't have a RF stereo out.

    greg
     
    GregS, Jan 11, 2006
    #11
  12. You'd think. But HiFi/Stereo does NOT mean that
    it has a stereo tuner (or stereo modulator). Alas.
     
    Richard Crowley, Jan 11, 2006
    #12
  13. Doc

    Doc Guest

    Nope. By coax I mean the threaded connections with the plastic center and
    little hole in the middle labeled "Antenna In" and "Out To TV". On the
    machine originally in question, coming in from the antenna and out through
    the composite to the stereo tv, I was getting mono sound. A couple of newer
    VCR's with the same setup result in an obvious stereo field.

    Too bad I didn't have the correct setup for the Faith Hill special, I'm sure
    it sounds amazing in stereo.
     
    Doc, Jan 11, 2006
    #13
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