[silent:arts]
Well-known member
proud I was able to finish this PCB layout today:
51X optical comp by analag !!!![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
before I order the first prototype PCBs tomorrow I want to include footprints for the Bourns potentiometers Jeff is using in his VPXXX amps. I just love their feel ...
(but I'm still unsure if I will do a custom order, which would be needed)
however, where are the features / options? ;D ;D ;D
simplified schematic
1] transformers are Pikatron or Lundahl
2] jumpers for the main audio path to select either +/- 24V, or +/-16V if you want to try other DOAs (anlags AHOA1 is best on +/-24V, sidechain is always +/-16V)
3] ribbon connector from the main to the control PCB. with this we can have the potentiometers centered on the front, and are ready for the D-AOC51X (Dual analag optical compressor 51X) - which will use the same audio PCBs but will have stepped Elma controls instead of potentiometers
4] VU buffer for watching the output level, meter zero and tracking potentiometers / switchable meter between output and gain reduction
5] stereo link switch with LED indicator
6] no true hardwire bypass this time. the relay connects the input to the output, leaving the input signal to the compressor
why ???
7] jumper selectable VU meter (working in bypass mode or not)
8] jumper selectable VU meter backlight (to indicate compressor in or not)
will let you know more once the prototype arrived![Big grin :D :D](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
![AOC51X-Preview01.gif](https://proxy.imagearchive.com/ddd/dddd3295bcf1202e41b2467419a550fc.gif)
![IMG_5993.JPG](https://proxy.imagearchive.com/1a9/1a929e32c5827cdc1c555c8b0ae72341.jpg)
51X optical comp by analag !!!
before I order the first prototype PCBs tomorrow I want to include footprints for the Bourns potentiometers Jeff is using in his VPXXX amps. I just love their feel ...
(but I'm still unsure if I will do a custom order, which would be needed)
however, where are the features / options? ;D ;D ;D
simplified schematic
1] transformers are Pikatron or Lundahl
2] jumpers for the main audio path to select either +/- 24V, or +/-16V if you want to try other DOAs (anlags AHOA1 is best on +/-24V, sidechain is always +/-16V)
3] ribbon connector from the main to the control PCB. with this we can have the potentiometers centered on the front, and are ready for the D-AOC51X (Dual analag optical compressor 51X) - which will use the same audio PCBs but will have stepped Elma controls instead of potentiometers
4] VU buffer for watching the output level, meter zero and tracking potentiometers / switchable meter between output and gain reduction
5] stereo link switch with LED indicator
6] no true hardwire bypass this time. the relay connects the input to the output, leaving the input signal to the compressor
why ???
7] jumper selectable VU meter (working in bypass mode or not)
8] jumper selectable VU meter backlight (to indicate compressor in or not)
will let you know more once the prototype arrived
![AOC51X-Front-Standard.gif](https://proxy.imagearchive.com/3ce/3ce938b42a417c6161ad614a43ca2f8b.gif)
![AOC51X-Front-Bourns.gif](https://proxy.imagearchive.com/428/428b6046ff7faf12a675b6ed1cea113d.gif)