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Sci.Electronics.Basics -> Handset telephone amplifier

There are 18 messages in this thread.
You are currently looking at messages 1 to 18.


Author: SBS
Date: 13:57 15-09-07


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.
Author: Charles
Date: 17:55 15-09-07


"SBS" <no.spam@me> wrote in message
news:46ec1d1f$0$36442$4fafbaef@reader5.news.tin.it...
> 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?



Author: SBS
Date: 19:54 15-09-07

Charles (charlesschuler@comcast.net) 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?
Author: JeffM
Date: 20:39 15-09-07

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

Multi-posting is just as ignorant
http://www.google.com/search?q=cache:qHhBKJ-sXKYJ:en.wikipedia.org/wiki/Cross-post+adequ
ately.answered+corrected+with.commas+individually+Disclaimers+*-*-*-marked-as-Read-in-ALL-
*-groups+Newsgroups.line
as not knowing when to BUY a solution.
http://www.google.com/froogle?scoring=p&price=between&price1=1&q=intitle:Tel
ephone-handset-amplifier&num=100
Author: SBS
Date: 21:18 15-09-07

JeffM (jeffm_@email.com) 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.
Date: 22:44 15-09-07

On Sun, 16 Sep 2007 01:54:44 +0200, "SBS" <no.spam@me> wrote:

>::: 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?



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%20amplifer&
;doy=16m9

Good Luck

* * *
Christopher

Temecula CA.USA
http://www.oldtemecula.com
Author: Floyd L. Davidson
Date: 23:58 15-09-07

"SBS" <no.spam@me> wrote:
>Charles (charlesschuler@comcast.net) 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?

Buy one. They are cheap.

--
Floyd L. Davidson <http://www.apaflo.com/floyd_davidson>;
Ukpeagvik (Barrow, Alaska) floyd@apaflo.com
Author: Michael Black
Date: 00:19 16-09-07

"SBS" (no.spam@me) writes:
> Charles (charlesschuler@comcast.net) 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?
>
>
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
Author: SBS
Date: 08:59 16-09-07

christopher@NOSPAMoldtemecula.com wrote:

:: 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%20amplifer&
;doy=16m9


Thank you, but it's too expensive (20£ -> 30EUR -> 40$).
It costs more than the phone! ;-)
Author: SBS
Date: 09:00 16-09-07

Michael Black (et472@FreeNet.Carleton.CA) 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.
Author: Michael A. Terrell
Date: 16:24 16-09-07

SBS wrote:
>
> christopher@NOSPAMoldtemecula.com wrote:
>
> :: 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%20amplifer&d
oy=16m9
>
> 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.


--
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
Author: SBS
Date: 17:13 16-09-07

Michael A. Terrell (mike.terrell@earthlink.net) 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.
Author: Phil Allison
Date: 20:52 16-09-07


"SBS"
>
> Can you please suggest me a tested scheme?
>


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

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




....... Phil



Author: Al in Dallas
Date: 21:07 16-09-07

On Sun, 16 Sep 2007 23:13:56 +0200, "SBS" <no.spam@me> wrote:

>Michael A. Terrell (mike.terrell@earthlink.net) 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.

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.

--
Al in St. Lou
Author: SBS
Date: 21:18 16-09-07

Phil Allison (philallison@tpg.com.au) ha scritto:

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

Thanks.
Author: Michael Black
Date: 21:56 16-09-07

"Phil Allison" (philallison@tpg.com.au) writes:
> "SBS"
>>
>> Can you please suggest me a tested scheme?
>>
>
>
> ** Do you want someone to supply you with a " scheme " or a "
schematic "
> ????
>
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
Author: SBS
Date: 22:15 16-09-07

Michael Black (et472@FreeNet.Carleton.CA) 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 ;-)
Author: Phil Allison
Date: 23:34 16-09-07


"Michael Black"
> "Phil Allison"
>> "SBS"
>>>
>>> Can you please suggest me a tested scheme?
>>>
>>
>> ** Do you want someone to supply you with a " scheme " or a "
schematic "
>> ????
>>
>
> 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.
>

** Bollocks.

Having a suitable schematic gives you a scheme.


> Though actually "schematic" derives from "scheme".


** Have a bad autism day - I see.




...... Phil
1


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