headset boost

[Daniel Inston]

I've attacked an old cordless phone and wired in a headset so that I can use
it hands free. I simply disconnected the phones mic and speaker and wored
them up to a headset socket.
While the mic works well; other party can hear me, I find that the earpiece
of the headset, even with the volume up loud is not quite enough if there is
any background noise.
So what I want to do is boost the phones speaker volume slightly so that the
volume control on the headset has some range to it. I thought that a garden
variety transistor might do it, along with a resistor or two.
Problem is - I dont know how - I can only follow instructions when it comes
to this sort of thing - so I am hoping that someone here will provide some
help.

Thanks in advance.
Daniel Inston

 

[David Wood]

You won't like this advice but, throw away the mess you've made and
buy a cheap commercial headset. After everyone you talk to on it
complains about the poor quality of the sound, resume using a handset
or buy a much better headset.

By the way, I've recently discovered a way to more easily move things
from place to place that employs a section of tree trunk with a hole
in the center and a stick through the hole.

 

[JeffM]

By the way, I've recently discovered a way to more easily move things
from place to place that employs a section of tree trunk with a hole
in the center and a stick through the hole.

C'mon. David Wood is just an alias, right?
Your real name is Gallagher isn't it?

 

[David Wood]

No, but sometimes watching people do things in the most difficult and
expensive way they know while asking others to advise them of even
more difficult and expensive variations is a bit much for me and my
sense of humor kicks in.

 

[Watson A.Name - "Watt Sun]

In article <3fbae052$0$1754$5a62ac22@freenews.iinet.net.au>,
daniel@dnisoft.com mentioned...

I've attacked an old cordless phone and wired in a headset so that I can use
it hands free. I simply disconnected the phones mic and speaker and wored
them up to a headset socket.
While the mic works well; other party can hear me, I find that the earpiece
of the headset, even with the volume up loud is not quite enough if there is
any background noise.
So what I want to do is boost the phones speaker volume slightly so that the
volume control on the headset has some range to it. I thought that a garden
variety transistor might do it, along with a resistor or two.
Problem is - I dont know how - I can only follow instructions when it comes
to this sort of thing - so I am hoping that someone here will provide some
help.

The handsets I've worked with use a 150 ohm element, so your problem
is probably that the headset you're using is a 16 ohm headset, and
needs a matching transformer to match it to the 150 ohm output. This
can be a very small transformer, and using a transformer means you
won't have to waste any battery current.

If you must use a device, try the LM386, which is available at Radio
Snack. It needs a minimum of parts and doesn't need much current.

Thanks in advance.
Daniel Inston

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[Ardent]

X-No-Archive: yes

On Sat, 22 Nov 2003 18:55:55 -0800, Watson A.Name - "Watt Sun, Dark
Remover" <alondra101@hotmail.com> wrote:

If you must use a device, try the LM386, which is available at Radio
Snack. It needs a minimum of parts and doesn't need much current.

Well, my Dad is hard of hearing and he found it irritating to switch
to T-coil and adjust the volume everytime there was a call for him. I
fitted a 386 inside the base instrument of the nomal telephone and now
my Dad is making more calls without bothering with his aid!!

HTH

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Sandy Archer
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