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#11
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Re: Going insane with hum from patchbay units NEED Your Help!
Will remove a few of the units in the morning and try what you suggest. Been recording all night and its like 5 am here so gonna close the door and run up to my house and sleep a while. Will try removing the humming units and report back in like 8-10 hrs
Big thank you to you all for the great tips and interest in this weirdness See you soon and have a nice night
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Best Regards Christopher #thestruggleisreal South Side Music Group WEBHOME |
#12
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Going insane with hum from patchbay units NEED Your Help!
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Having said all this, I honestly think you should reassess your methodology. Never in my life have I ever considered turning gear off and leaving it patched. Why? Because of this very issue. If gear is patched, it should be on. Therefore, if you want to turn it off, you should unpatch it. At least, that's my take on it. Edit- Darryl made a really good point I glossed over earlier. When a piece of gear is switched off, all bets are off when it comes to maintaining common mode rejection on both single-ended and differential connections.
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James Cadwallader Mac Studio, 64GB RAM, 1 TB SSD, Glyph 2TB USB3 HDD, OWC drive dock, Mac OS Monterey 12.6.8 Pro Tools Ultimate 2023.9, HD Native, Focusrite Red 8Pre Presonus Faderport, Pro Tools | Control |
#13
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Re: Going insane with hum from patchbay units NEED Your Help!
I know Christopher has said they had the wiring professionally done but still I'd check to see that maybe there's AC mains that might have the wiring wrong with say hot and neutral flipped or that if somehow the grounds have current on them. I have a little outlet tester that plugs into an outlet with three lights on the end and the sequence of lights tells what's up with the outlet it's plugged into.
Another possibility is the XLR cables themselves. I've encountered several over the years that are miswired from the factory. Are the patch bays with XLR's isolated from rack ground? Last edited by musicman691; 09-07-2020 at 04:55 AM. Reason: corrected spelling error |
#14
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Re: Going insane with hum from patchbay units NEED Your Help!
Good question, and does the hum stop with ground lifted?
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Janne What we do in life, echoes in eternity. |
#15
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Re: Going insane with hum from patchbay units NEED Your Help!
Question: Are the bays using individual grounds or are they all bussed together? Whatever they are set to, maybe changing to the other method will help You might also reach out to the company that makes the patchbays and see if they have any solutions
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HP Z4 workstation, Mbox Studio https://www.facebook.com/search/top/...0sound%20works The better I drink, the more I mix BTW, my name is Dave, but most people call me.........................Dave |
#16
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Re: Going insane with hum from patchbay units NEED Your Help!
Thank you guys for all your tips. Going to pull out some units from rack 1 and 2 and see what happens if they aremt in the racks and also check the Patchbays thouroughly and will report back.
Gonna check grounding etc tonight and make sure all that is OK. We dont have any issues when the gear that hum are ON but as soon as we turn off them hum appears if they are patched in. Stay Tuned and again Really appreciate your knowledge.
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Best Regards Christopher #thestruggleisreal South Side Music Group WEBHOME |
#17
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Re: Going insane with hum from patchbay units NEED Your Help!
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HP Z4 workstation, Mbox Studio https://www.facebook.com/search/top/...0sound%20works The better I drink, the more I mix BTW, my name is Dave, but most people call me.........................Dave |
#18
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Re: Going insane with hum from patchbay units NEED Your Help!
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Another possibility is that inside the gear the neutral and grounds are tied together. Not good. |
#19
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Re: Going insane with hum from patchbay units NEED Your Help!
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Never noticed thid before as we had all the gear incl the SSL4056 G+ console and 24 tape machine on all the time but as we dont use the 24 and the SSL all the time and neither all the analog toys i started turning off some of the units and left the patch canles still be inserted and heard that some of them would hum and were amitting an annoying noise so this started becomming evident just a few weeks ago and a few guys have re-soldered all the Mogami cables and Neutrik connectors on the affected units this past week and now we are gonna start testing the cables again and make sure all of the soldering is 100 and see if the noise disappers. I talked to Neve Techs in the US this morning and they said that older units can have that annoyance as said in the first few posts from James and Darryl and I still wanna see if we can eliminate as many units as possible so if there are a few left that hum by design if not powered on but patched in then we can live with that but our Bluestripes and Rev Fs are causing annoying hums if turned off but as stated by many here, it is not a really big issue as it doesnt happen when we turn them on and leaving units patched in and turned off while using other gear might be a stupid idea anyway. Will keep on this tonight and try all your tips.
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Best Regards Christopher #thestruggleisreal South Side Music Group WEBHOME |
#20
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Re: Going insane with hum from patchbay units NEED Your Help!
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You probably covered this, but just thought I'd throw in on this-:) Check out Equitech.. They are great and the people are still very helpful. The founder passed away unexpectedly a few years back, but the family and team are still going strong! You are probably fine with your setup, but someone there might be able to help you out! https://equitech.com
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