audio amp question

[Dan Stephen]

I have a client who is looking for the following:

a 9 volt audio amplifier into which a microphone and headphones plug.

The purpose is for him to be able to speak to a man who is extremely hard of
hearing.

Any ideas for a cheap circuit?

Dan

 

[Graham Knott]

Dan Stephen wrote:

I have a client who is looking for the following:

a 9 volt audio amplifier into which a microphone and headphones plug.

The purpose is for him to be able to speak to a man who is extremely
hard of hearing.

Any ideas for a cheap circuit?

Dan

--
Have a look at
http://homepage.ntlworld.com/g.knott/elect24.htm

 

[Roman Arnet]

Dan Stephen schrieb:

I have a client who is looking for the following:

a 9 volt audio amplifier into which a microphone and headphones plug.

The purpose is for him to be able to speak to a man who is extremely hard of
hearing.

Any ideas for a cheap circuit?

Dan


I he going to blow up his ears?!

Roman