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| ===== Alignment Procedure for 234 Speech Processor ===== | ===== Alignment Procedure for 234 Speech Processor ===== | ||
| + | |||
| + | //(from Ten-Tec service dept with annotated photo by N1EU)// | ||
| 1. Hook up to rig as normal with no input (no mic connected) | 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 | 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 | two front-- important when you try to replace them! The self-tapping screws | ||
| go in the front...) | go in the front...) | ||
| + | |||
| 3. Attach scope to junction of R18 and R19 on Clipper-Detector board (rear | 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. | + | board). Note: R18 is immediately in front of crystal Y-1. |
| - | 4. Turn R33 BALANCE pot on SSB board fully CW. Peak T-1 for maximum | + | |
| - | output. Turn R-33 back CCW for a null in output. | + | * Turn R33 BALANCE pot on SSB board fully CW. |
| - | 5. Attach counter to TP1 (coax) on SSB Board. This is the center conductor | + | * Peak T-1 for maximum output. |
| - | of the coax that carries the BFO signal from the SSB board to the | + | * Turn R-33 back CCW for a null in output. |
| - | Clipper-detector 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 | + | 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. |
| - | control back fully CW. Frequency should drop to approximately 6.099780 | + | * Turn front panel passband control fully CCW and adjust C-14 for 6.100220 MHz (that is, 220 Hz above 6.1 MHz). |
| - | (that is, 220 Hz below 6.1 MHz). Note: the procedure is to approximately | + | * Turn passband control back fully CW. Frequency should drop to approximately 6.099780 (that is, 220 Hz below 6.1 MHz). |
| - | center the passband around 6.1 MHz. Slight adjustment of C-14 may be | + | Note: the procedure is to approximately center the passband around 6.1 MHz. Slight adjustment of C-14 may be needed. |
| - | needed. | + | |
| - | 6. Turn passband control back to center, or position so that your voice | + | 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. |
| - | sounds normal to someone who knows your voice. Note: turning the passband | + | |
| - | control CCW increases the treble, while turning the control CW increases | + | {{:234pcb.jpg?|}} |
| - | bass. This is counter intuitive and not mentioned in the manual. | + | |
