Getting a high pitch with my device to record phone conversation.

[LegendBreath]

Hi,
Well the title says much of it
But, just to say, I made some device that records phone conversation.
I have the schematic and the high pitch sound (the buzz)

The high pitch
http://rapidshare.de/files/6761508/buzz.mp3.html

Can someone help me?

View attachment 37870

 

[audioguru2]

Hi LegendBreath,
Turn off the TV next time you record. I hear lotsa stuff going-on on your recording.
I can identify the sounds from most things, but I wonder where the flute playing comes from.

Audio equipment needs shielded audio cables to avoid interference like you have, and the transformer might also need a shield.
Instead of running the wires from a wall to the phone, try connecting the capacitors to the red and green wires in the phone's jack. A phone line is about 52VDC when not in use so use capacitors rated for at least 63V. ;D

View attachment 37872

 

[LegendBreath]

Hi LegendBreath,
Turn off the TV next time you record. I hear lotsa stuff going-on on your recording.
I can identify the sounds from most things, but I wonder where the flute playing comes from.

Audio equipment needs shielded audio cables to avoid interference like you have, and the transformer might also need a shield.
Instead of running the wires from a wall to the phone, try connecting the capacitors to the red and green wires in the phone's jack. A phone line is about 52VDC when not in use so use capacitors rated for at least 63V. ;D

Lol the TV and flute... probably from the girl I was speaking with
I'll try alone to see what it does...

And what the... me, swearing in background???

Thanks alot

 

[steven2]

more easyer to just buy a telephone pickup and stick it on the back of the phone and to record just plug the other end into a tape recorder