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Post by mrholmes on Aug 19, 2020 15:41:06 GMT -6
Thanks guys yeah a second patchbay is on the way and later this year I invest in 12 more IOs ... with this the setup could be used to any taste. Comments on inserting outboard on the console via direct on the DAAD? Any difference I would notice?My only comment on that is the channel insert on the console is unbalanced. That's why when mixing I always inserted my outboard between the DA and before the line input of the console.
Same as with my old A+H mini mixer.... OK I don't want this level drop game again.
Does anyone know where I can get the male version of the PSU connector. Want to wire an extension cord for placing the PSU in the machine room.
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Post by svart on Aug 19, 2020 16:14:37 GMT -6
My only comment on that is the channel insert on the console is unbalanced. That's why when mixing I always inserted my outboard between the DA and before the line input of the console.
Same as with my old A+H mini mixer.... OK I don't want this level drop game again.
Does anyone know where I can get the male version of the PSU connector. Want to wire an extension cord for placing the PSU in the machine room.
How far away is the machine room? You'll need to calculate the copper losses, i.e., the resistance over the distance away, then use ohm's law to calculate the voltage loss using the resistance and the max current consumption of the board. You might be losing multiple volts over the distance unless you use very large gauge cables.
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Post by mrholmes on Aug 19, 2020 16:36:39 GMT -6
Same as with my old A+H mini mixer.... OK I don't want this level drop game again.
Does anyone know where I can get the male version of the PSU connector. Want to wire an extension cord for placing the PSU in the machine room.
How far away is the machine room? You'll need to calculate the copper losses, i.e., the resistance over the distance away, then use ohm's law to calculate the voltage loss using the resistance and the max current consumption of the board. You might be losing multiple volts over the distance unless you use very large gauge cables.
32 ft of this one....
I think I got it right it would be 0,34 Ohm per wire.
Big DEAL?
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Post by svart on Aug 19, 2020 18:18:23 GMT -6
How far away is the machine room? You'll need to calculate the copper losses, i.e., the resistance over the distance away, then use ohm's law to calculate the voltage loss using the resistance and the max current consumption of the board. You might be losing multiple volts over the distance unless you use very large gauge cables.
32 ft of this one....
I think I got it right it would be 0,34 Ohm per wire.
Big DEAL?
0.34r looks about right for the specs of that cable over 32ft. Now, if we estimate that the board needs 1Amp per power rail, and ohms law says: V=IR Then, 1A x 0.34r= 0.34v of lost voltage, per power rail. Not a whole lot overall, but it's still 2% of 17V.
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Post by mrholmes on Aug 19, 2020 18:25:15 GMT -6
32 ft of this one....
I think I got it right it would be 0,34 Ohm per wire.
Big DEAL?
0.34r looks about right for the specs of that cable over 32ft. Now, if we estimate that the board needs 1Amp per power rail, and ohms law says: V=IR Then, 1A x 0.34r= 0.34v of lost voltage, per power rail. Not a whole lot overall, but it's still 2% of 17V. Can I do something against the loss?
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Post by svart on Aug 19, 2020 18:46:22 GMT -6
0.34r looks about right for the specs of that cable over 32ft. Now, if we estimate that the board needs 1Amp per power rail, and ohms law says: V=IR Then, 1A x 0.34r= 0.34v of lost voltage, per power rail. Not a whole lot overall, but it's still 2% of 17V. Can I do something against the loss? Larger gauge cables, or shorter cable are really the only options.
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Post by mrholmes on Sept 12, 2020 14:12:22 GMT -6
... direct out is the standard approach, because it’s cleanest and important for the tape era. For digital I realized I personally never listen to PFL on a single speaker when getting a sound, I always listen to stereo bus on both speakers so why am I not capturing a stereo bus? One of those aha moments, esp when pushing the the faders when both sides get nonlinear and 3D and yet it wasn’t being captured, and made me frustrated and mentally challenged for a few years.. But of course, there are no rules.. whatever works!
Today I used the EQ the first time in mixing via direct out on a LV ... It was JAW dropping the DELTA 200 EQ sounds sweet.
Wide and open not phasy at all, may a bit pinched in the top end, but nothing that hurts the show.
Compared to another British brand which also starts with an (S) I was much disappointed by an AWS 900. I expected that the EQ gives me some bigness which the SSL plug in can't, and it was not the case at all. It sounded boring too.
Now this cheap Soundcraft Delta live console EQ is sweet.
Using just the EQs justifies the setup trouble.
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Post by johneppstein on Sept 12, 2020 19:44:17 GMT -6
So is it actually buzzing, or is there a clogged fan?
THE PSU makes a buzz and it is the transformer. All caps look good, but hey its a 23 years old PSU.
There is no noise or hum in the audio path🙏
The PSU buzz gets louder under load from the delta.
I may start recapping the PSI first?
You PS has loose plates that are actuated by the magnetic field to cause the noise. Try tightening the bolts/screws that hold the tranny together as well as the ones that mount it. With luck that will help.
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Post by mrholmes on Sept 13, 2020 5:09:06 GMT -6
THE PSU makes a buzz and it is the transformer. All caps look good, but hey its a 23 years old PSU.
There is no noise or hum in the audio path🙏
The PSU buzz gets louder under load from the delta.
I may start recapping the PSI first?
You PS has loose plates that are actuated by the magnetic field to cause the noise. Try tightening the bolts/screws that hold the tranny together as well as the ones that mount it. With luck that will help.
THX John for your expert opinion. It's better since the recapping I tightened the screws which mount the tranny to the housing. The transformer is glued together, as far as I understand it there are no screws for the transformer housing.
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Post by johneppstein on Sept 13, 2020 20:03:18 GMT -6
You PS has loose plates that are actuated by the magnetic field to cause the noise. Try tightening the bolts/screws that hold the tranny together as well as the ones that mount it. With luck that will help.
THX John for your expert opinion. It's better since the recapping I tightened the screws which mount the tranny to the housing. The transformer is glued together, as far as I understand it there are no screws for the transformer housing.
Most transformers of any appreciable size should have four bolts in the corners that hold them together and hold the cover plates on. Sometimes they have extended ends used for securing the transformer to the chassis. These are the screws/bolts to which I referred. I find it very hard to conceive of a power transformer for a console that lacks these bolts. There should be one set of nuts that hold the tranny together and a second set on the same bolts to secure the tranny to the chassis. I suppose it's possible that they might save a few pennies by eliminating four of the nuts, but I would find it surprising that Harman would be that cheap. Behringer, maybe, but not Harman.
The transformer should also be potted with a laquer dip, what you refer to as "glue".
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Post by mrholmes on Sept 14, 2020 8:30:42 GMT -6
THX John for your expert opinion. It's better since the recapping I tightened the screws which mount the tranny to the housing. The transformer is glued together, as far as I understand it there are no screws for the transformer housing.
Most transformers of any appreciable size should have four bolts in the corners that hold them together and hold the cover plates on. Sometimes they have extended ends used for securing the transformer to the chassis. These are the screws/bolts to which I referred. I find it very hard to conceive of a power transformer for a console that lacks these bolts. There should be one set of nuts that hold the tranny together and a second set on the same bolts to secure the tranny to the chassis. I suppose it's possible that they might save a few pennies by eliminating four of the nuts, but I would find it surprising that Harman would be that cheap. Behringer, maybe, but not Harman.
The transformer should also be potted with a laquer dip, what you refer to as "glue".
THX for your insights I will check again. The plan is anyway to put the regulator caps on small pcb instead of hardwired - nicer.
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Post by mrholmes on Nov 29, 2020 16:11:43 GMT -6
svart johneppstein ericn In the end, after everything else failed, I solved the PSU noise much different.... Placed it on four dampers for a washing machine, it reduced the noise to 80%. I am extremely happy with the Delta special for tracking. One last technical question rises up. The console is clean as clean can be and sounds great and sits well in the mix. But the top end can sound a bit pinched on LVs in the transients. Is there anything I can do about this from a technical standpoint? THX A.
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ericn
Temp
Balance Engineer
Posts: 14,809
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Post by ericn on Nov 29, 2020 16:32:53 GMT -6
svart johneppstein ericn In the end, after everything else failed, I solved the PSU noise much different.... Placed it on four dampers for a washing machine, it reduced the noise to 80%. I am extremely happy with the Delta special for tracking. One last technical question rises up. The console is clean as clean can be and sounds great and sits well in the mix. But the top end can sound a bit pinched on LVs in the transients. Is there anything I can do about this from a technical standpoint? THX A. I would give Jim Williams a call in that one.
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