Telephone line to Soundcard - NEED HELP

and

short

It's supposed to be used with a tape recorder which is isolated from the AC line. It is not meant to be used with anything else connected to AC.

Buy a phone patch, which is made for this purpose.

schreef in bericht news: snipped-for-privacy@g14g2000cwa.googlegroups.com...

A capacitor (e.g. 1 muF) in series with the center conductor of the patchcord, and you have a cheap solution connection your telephone line to your PC.

Regards Wim

jack

line to

No, it is _not_ a solution. The telephone line must be isolated completely from the equipment, both for shock hazard and for equipment protection reasons. Connecting either side of the telephone line to equipment will unbalance the line and cause multiple problems, RFI from AM radio stations and a huge amount of HUM.

"Watson A.Name - "Watt Sun, the Dark Remover"" schreef in bericht news: snipped-for-privacy@corp.supernews.com...

Well it works excellent for me; probably it is better to have a capacitor in both the tip and in the ring wire. I "tap" the telephone line with my PC wile the telphone is off-hook ofcourse; The Telephone set creates a proper termination for the line. The tap is a high impedance tap which has not much impact on the line behaviour.

regards Wim

The beast way to get audio from the telephone line is to use a transformer with two identical primary windings. Use the windings in series with a capacitor connecting the mid points.

The mid points can then be used to check voltage, short (with 400 Ohms) to "hold" the line etc.

Bill K7NOM