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Handset telephone amplifier

Discussion in 'Electronic Basics' 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. Charles

    Charles Guest

    Sure. Use amplifiers. Homework?
     
  3. SBS

    SBS Guest

    Charles () 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?
    ::
    :: Sure. Use amplifiers. Homework?

    Homework? Absolutely not. I need an amplifier for the
    telephone because my parents are becoming deaf.

    Can you please suggest me a good scheme?
     
  4. JeffM

    JeffM Guest

  5. SBS

    SBS Guest

    JeffM () ha scritto:

    ::: Homework? Absolutely not. I need an amplifier for the
    ::: telephone because my parents are becoming deaf.
    ::
    :: Multi-posting is just as ignorant

    Thank you, Einstein. Rude answer is just as ignorant.

    :: as not knowing when to BUY a solution.

    I live in Europe therefore the delivery cost would be more
    expensive than the device itself.
     
  6. Guest



    Don't re-invent the wheel, the link below is better and cheaper than
    anything you could make and its close to home.

    http://www.maplin.co.uk/Module.aspx?ModuleNo=97462&criteria=telephone amplifer&doy=16m9

    Good Luck

    * * *
    Christopher

    Temecula CA.USA
    http://www.oldtemecula.com
     
  7. Buy one. They are cheap.
     
  8. Then you don't need a microphone. Their voices aren't getting
    weak, it's their hearing.

    Check with your telephone company. They may still offer telephones
    with built in amplifiers for those with hearing loss.

    Find a local support group for those with hearing loss, and likely
    they can point you to local commercial products. Little amplifiers
    that fasten over the telephone receiver, and amplify the incoming
    sounds, just what they need.

    Or got to a hearing aid dealer, and ask them about such products.

    If they are losing their hearing, they likely would benefit from
    hearing aids, which work for everything. Many/most hearing aids
    include an inductive coupler, precisely for use with telephones
    (it picks up the signal from the telephone receiver but the hearing
    aid stays in place to amplify the signal and do the desired frequency
    shaping). Though, I have the impression that at least some
    third party telephones nowadays may use a transducer for the receiver
    that has no inductive field to use with those inductive pickups. Either
    that, or they aren't as well designed as traditional phones, so the
    layout is not optimum for inductive pickup.

    Some telephones now are designed for use with headsets, so I gather.
    That makes it really easy to insert a small audio amplifier between
    the output of the phone and the headphone(s) in the headset.

    Michael
     
  9. SBS

    SBS Guest

  10. SBS

    SBS Guest

    Michael Black () ha scritto:

    :: Some telephones now are designed for use with headsets, so I gather.
    :: That makes it really easy to insert a small audio amplifier between
    :: the output of the phone and the headphone(s) in the headset.


    Thank you for your advices.
     

  11. Your parents aren't worth the $40? Shame on you.


    --
    Service to my country? Been there, Done that, and I've got my DD214 to
    prove it.
    Member of DAV #85.

    Michael A. Terrell
    Central Florida
     
  12. SBS

    SBS Guest

    Michael A. Terrell () ha scritto:

    ::: Thank you, but it's too expensive (20£ -> 30EUR -> 40$).
    ::: It costs more than the phone! ;-)
    ::
    ::
    :: Your parents aren't worth the $40? Shame on you.

    I have a lot of components and If I find a good scheme then
    I can build a device like that.
     
  13. Phil Allison

    Phil Allison Guest

    "SBS"

    ** Do you want someone to supply you with a " scheme " or a " schematic "
    ????

    The correct abbreviation for "schematic " is " schem ".




    ........ Phil
     
  14. Al in Dallas

    Al in Dallas Guest

    Yes, but it seems you'll have to enroll in some courses and learn how
    to design the circuits for yourself. It's probably quicker and
    definitely less expensive to buy the damn twenty-pound device.
     
  15. SBS

    SBS Guest

    Phil Allison () ha scritto:

    :: The correct abbreviation for "schematic " is " schem ".

    Thanks.
     
  16. But people did provide him with a variety of schemes. He refused
    at least some of them. But if he doesn't have a scheme in the
    first place, he's hardly ready for a schematic.

    Though actually "schematic" derives from "scheme".

    Michael
     
  17. SBS

    SBS Guest

    Michael Black () ha scritto:


    :: But people did provide him with a variety of schemes.
    :: He refused at least some of them. But if he doesn't have
    :: a scheme in the first place, he's hardly ready for a schematic.
    ::
    :: Though actually "schematic" derives from "scheme".


    Nobody has given to me a scheme ;-)
     
  18. Phil Allison

    Phil Allison Guest

    "Michael Black"
    ** Bollocks.

    Having a suitable schematic gives you a scheme.


    ** Have a bad autism day - I see.




    ....... Phil
     
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