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Telephone handset amplifier

Discussion in 'Electronic Design' started by SBS, Sep 15, 2007.

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  1. SBS

    SBS Guest

    Hi, I have to build a telephone handset amplifier
    which has to amplify both the speaker on the ear
    (incoming sound) and the mic (outgoing voice).
    It has to be powered by 3xAA/AAA batteries
    or 1x9V battery.

    Can you please suggest me a tested scheme?

    Rgeards.
     
  2. SBS

    SBS Guest

    SBS ([email protected]) ha scritto:

    :: Hi, I have to build a telephone handset amplifier
    :: which has to amplify both the speaker on the ear
    :: (incoming sound) and the mic (outgoing voice).
    :: It has to be powered by 3xAA/AAA batteries
    :: or 1x9V battery.
    ::
    :: Can you please suggest me a tested scheme?


    Any idea?

    Is the group only populated by spammers?
     
  3. Ecnerwal

    Ecnerwal Guest

    No, sometimes we get students who want someone else to do their homework
    problems for them mixed in with the spammers. For their own good, we
    tend to let them do their own homework, as they will never learn if they
    let someone else do it (and it irks those of us who did our own
    homework).

    If you want a tested off the shelf design, go buy it off the shelf -
    providing income to the person who designed and tested it.

    If you want to design it and have it be tested, design it, and then test
    it.
     
  4. JeffM

    JeffM Guest

    I was thinking about linking to Froogle.
    I like your response better.
     
  5. SBS

    SBS Guest

    Ecnerwal () ha scritto:

    ::::: Can you please suggest me a tested scheme?

    ::: Any idea?
    :::
    ::: Is the group only populated by spammers?

    :: If you want a tested off the shelf design, go buy it off the shelf -
    :: providing income to the person who designed and tested it.
    ::
    :: If you want to design it and have it be tested, design it, and then
    :: test it.

    This is not an homework and I have no money and no time to waste
    making tests. I need a telephone handset amplifier scheme and
    that is what I really need. Please no rude or stupid answers, no jokes
    and no spam, thanks.
     
  6. Phil Allison

    Phil Allison Guest

    "SBS"

    ** Really - what fascist pig is making you do that ?


    ** So you get a choice on that ?


    ** Handset amplifiers for the incoming voice are readily available at low
    cost.

    There is a good reason why they do not amplify the mic signal.

    Cos damn thing breaks into a loud, acoustic feedback squeal if you try.

    Get real - you dago fuckhead.



    ........ Phil
     
  7. SBS

    SBS Guest

    Phil Allison () ha scritto:

    :: ** Handset amplifiers for the incoming voice are
    :: readily available at low cost.
    ::
    :: There is a good reason why they do not amplify the
    :: mic signal.
    ::
    :: Cos damn thing breaks into a loud, acoustic feedback
    :: squeal if you try.

    I need to build a device such as this because I have connect
    an headset (mic + headphone) to the telephone, but the
    sound level is too low and I can't understand any words...
    My old parents too.

    This evening I have made some tests and maybe the mic
    doesn't need any gain.
     
  8. SBS

    SBS Guest

    Phil Allison () ha scritto:

    :: There is a good reason why they do not amplify the mic signal.
    ::
    :: Cos damn thing breaks into a loud, acoustic feedback squeal if you try.


    Sorry, I forgot to thank you.
     
  9. No, Sci.electronic.design is really a sophisticated community, of
    paranoid, talented, bitching, funny,egocentric, tanktop wearing,
    arrogant, politically corrupt republicans and do nothing democrats,
    who, generally, like nothing better than a good argument about cooking
    sheep testicles in olive oil, or proving that dark matter is nothing
    more than Phlogiston in diguise.

    Thus predating Myspace and Facebook by almost 20 years.


    Martin
     
  10. Hey! I take offence to that! I don't wear tanktops.
     
  11. Updated
    No, Sci.electronic.design is really a sophisticated community, of
    paranoid, talented, bitching, funny,egocentric, tanktop/plaid/corduroy
    wearing,arrogant, politically corrupt republicans and do nothing
    democrats, who, generally, like nothing better than a good argument
    about cooking sheep testicles in homegrown handpressed olive oil, or
    proving that dark matter is nothing more than Phlogiston in diguise,
    using mismatched datasets and incorrect assumptions

    Thus predating Myspace and Facebook by almost 20 years.


    Martin
     
  12. SBS

    SBS Guest

    Martin Griffith ([email protected]___.es) ha scritto:

    ::: Is the group only populated by spammers?
    :::
    :: No, Sci.electronic.design is really a sophisticated community, of
    :: paranoid, talented, bitching, funny,egocentric, tanktop wearing,
    :: arrogant, politically corrupt republicans and do nothing democrats,
    :: who, generally, like nothing better than a good argument about cooking
    :: sheep testicles in olive oil, or proving that dark matter is nothing
    :: more than Phlogiston in diguise.


    You are so fun! LOL

    Thanks.
     
  13. Fred Abse

    Fred Abse Guest

    <Grin>
     
  14. D from BC

    D from BC Guest

    Does this mean everybody should drop usenet and go to Myspace and
    Facebook?



    D from BC
     
  15. No way, lets just make sure that those social networking sites don't
    find out about the usenet isn't only about binaries with big boobs


    Martin
     
  16. Rich Grise

    Rich Grise Guest

    http://www.google.com/search?hl=en&q=telephone+handset+amplifier

    Good Luck!
    Rich
     
  17. Rich Grise

    Rich Grise Guest

    Back in the day, we used to call them "muscle shirts". ;-)

    Cheers!
    Rich
     
  18. Rich Grise

    Rich Grise Guest

    Everybody? =:-O No, no, heavens no!

    Just the ones who can't handle the Real World of USENET. ;-)

    Cheers!
    Rich
     
  19. John Ferrell

    John Ferrell Guest

    It looks like the answer to your question is that the collective
    wisdom on this newsgroup is not up to the requested task.

    I would also like a device like that, especially if it could help me
    communicate with some of my more hearing impaired friends. If my
    yelling into the handset makes it work I expect that it is possible.

    I know it would be best if I could get the amplification upon the
    other end but I only have control of my end. There seem to be devices
    advertised as solutions but I have yet to hear anyone willing to say
    they actually work.

    I have a drawer full of headset telephone devices that don't do the
    job including one rather pricey Plantronics unit.

    Ideally the device would plug into a telephone with a jack, have
    adjustable level controls, some frequency shaping and
    anti-feedback.qualities. It would also use an inexpensive computer
    headset to permit simple replacement of the part that wears out.

    I realize that English speaking engineers that can solve this problem
    are becoming increasingly scarce.

    John Ferrell W8CCW
    "Life is easier if you learn to
    plow around the stumps"

    If you find a practical solution, please let me know...
     
  20. Don Bowey

    Don Bowey Guest

    On the other hand, have you noticed the title/subject of this newsboard?

    What was requested is:

    A. Really basic stuff which should have been posted to the Basic board
    where many people will be more than happy to re-invent the wheel.

    B. Readily available, and *very little* googling will find them;
    with schematics, explanations ,etc.

    C. Apparently beyond the capability of the OP to build without a lot of
    hand-holding.
    That may be true......... The less technical of them have gotten a ham
    license and now hang out on 2M phone.

    Why don't you quit casting your opinions, and just go do what the OP wants?
     
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