"Tom, N3IJ" wrote in message
...
Can anyone suggest a source of a circuit or kit for a mono amp to
increase my laptop's headphone output level to line level?

As a starting point, it would be helpful just to learn what these
levels are. I want to drive a line-level transceiver input for digital
hamming.

Any suggestions would be appreciated.

Tnx & 73, Tom

Typically it needs DECREASED not increased. There are circuits on the
internet for attenuating the output sound level from the computer to be
acceptable to the radio for digital modes. One could potentially use the
volume control on the computer but since the level is relatively high, it's
hard to get the fine control without an attenuator between the computer and
radio.

Dee, N8UZE