(from Ten-Tec service dept with notes in italic by N1EU)

1. Hook up to rig as normal with no input (no mic connected)

2. Remove top cover of 234 (note that two rear screws are different from two front– important when you try to replace them! The self-tapping screws go in the front…)

3. Attach scope to junction of R18 and R19 on Clipper-Detector board (rear board). Note: R18 is immediately in front of crystal Y-1. (looking from front, Y-1 is the back left xtal and R19 is immediately in front of and at right angles to R18)

• Turn R33 BALANCE pot on SSB board (front board) fully CW. (looking from front, R33 is back right pot)
• Peak T-1 for maximum output. (immediately right of two xtals)
• Turn R-33 back CCW for a null in output.

5. Attach counter to TP1 (coax) on SSB Board. This is the center conductor of the coax that carries the BFO signal from the SSB board to the Clipper-detector board. (looking from front, on right side of board)

• Turn front panel passband control fully CCW and adjust C-14 for 6.100220 MHz (that is, 220 Hz above 6.1 MHz).
• Turn passband control back fully CW. Frequency should drop to approximately 6.099780 (that is, 220 Hz below 6.1 MHz).

Note: the procedure is to approximately center the passband around 6.1 MHz. Slight adjustment of C-14 may be needed.

6. Turn passband control back to center, or position so that your voice sounds normal to someone who knows your voice. Note: turning the passband control CCW increases the treble, while turning the control CW increases bass. This is counter intuitive and not mentioned in the manual.