====== Omni Series C Audio Mod ======
**From the Ten-Tec Reflector September 19, 1999**

Here is a simple mod for improved audio on the Omni C. I have not tested it on other Omni series such as A, B, D etc. but most likely it would have the same effect. It gives a boost to voice frequencies and a slight peak around 600-700hz for cw. All signals seem to be much easier to copy with the now brilliant sounding audio.

Parts needed.........1ea. 1 meg resistor

  - Remove bottom cover of rig.
  - Locate the audio-sidetone board. This is the one with the sidetone pots. There is no need to remove the board.
  - Solder the resistor between pin 2 of IC-1 (LM-380) and AF-Output. Instead of soldering directly to pin 2 of IC-1, you may want to solder to R8's (10K) lead which connects to pin 2 and the other end to C11's negative lead.
  - I suggest sliding some insulation over the 1 meg resistor's leads to prevent shorting.
  - Replace the bottom cover and enjoy.

73
Steve N4LQ