DaveM wrote:
The unit at http://www.omnicronelectronics.com/PC/LIC-1PC.htm is more
appropriate for the OP, according to his stated problem. However, if
the OP has the ability, there is a schematic of such a unit at
http://www.solorb.com/elect/phone/tap. Another one with some good
details at http://www.epanorama.net/documents/t...elerecord.html.
/analog/LIC-100.htm

The zener diodes across the transformer secondary are a good idea.