A simple Broadband off the air monitor

Submitted by W2INR

                  Click on circuit diagram  for full size image

  NOTE: The headphones listed on the drawing are incorrect and should read Sony 7506's.

This circuit is nothing new. It provides a simple way to monitor ones own audio. The beauty of the circuit is the unrestricted audio.

When monitoring your off the air signal you want a clean broadband signal. Receivers have IF's, AGC, audio chains and filters to contend with . Yes they will work but there is a compromise.


The other most important element to this circuit is the headphones. You should spend a little money to ensure you have a good set that reproduce properly and are comfortable. i recommend the Sony 7506's. These are use throughout the broadcast industry and are comfortable. Don't forget the phasing switch!! Just like you audio chain you want your headphones in phase!!

Gary/W2INR