Gold

Re: D-AOC PCBs - the building and help Thread
« Reply #1560 on: August 06, 2020, 02:39:38 PM »
I put 10 turn trimmers is the Input and Output positions. I only brought Compression out to the faceplate. I use the input trimmer to get the thresholds matched and use the Output trimmer to match the gain.


dagoose

Re: D-AOC PCBs - the building and help Thread
« Reply #1561 on: August 07, 2020, 02:25:50 AM »
My guess is that you won't get the required accuracy by modding the device. Try Ian's "Neve Trick":take a 1k variable trimmer and put the hot leg of the 600 ohm transformer secondary to pin 1 of the trimmer, take the "wiper" or pin 2 as output and connect the TX 600 ohm secondary cold leg to pin 3. Do that on both L and R and set the trimmer to match gain.
That's a good one,  I will give that a try.  8)
Da Goose Mastering http://www.dagoosemastering.nl


Gold

Re: D-AOC PCBs - the building and help Thread
« Reply #1563 on: August 20, 2020, 03:05:07 PM »
I got the second Double DAOC done. I still need to dress some wires but I have both units pretty tightly matched. That's eight channels.




[silent:arts]

Re: D-AOC PCBs - the building and help Thread
« Reply #1564 on: August 21, 2020, 11:39:25 AM »
Paul, that looks amazing!

Gold

Re: D-AOC PCBs - the building and help Thread
« Reply #1565 on: August 21, 2020, 12:04:56 PM »
Thanks. It feels good to have them done.

audiophreak

Re: D-AOC PCBs - the building and help Thread
« Reply #1566 on: August 21, 2020, 12:54:03 PM »
WOW !!
" Music washes away from the soul, the dust of everyday life "   ... in loving memory of my Father.

dagoose

Re: D-AOC PCBs - the building and help Thread
« Reply #1567 on: September 01, 2020, 08:13:30 AM »
Report back
I just made the Left and Right level correct in a different, more simple but effective way. The difference was about 0.2db, so not that big and so the steps didn't have to be big.
I replaced R103 (R203) to a 44k + 10k multiturn trimmer instead of the 49k9. That way I could easily trim it to get the same gain on L an R.  8)
Da Goose Mastering http://www.dagoosemastering.nl


 

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