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Post by johneppstein on Oct 31, 2020 12:27:04 GMT -6
I'm the RF world, where I work, it's a biiiiig no-no to have separate grounds or to float a ground in any way. To that end I always ground the shell of a connector. Aren't all pre made (or for that matter, DIY) XLR mic cables made with pin 1 not attached to the shell svart ? Yes.
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Post by johneppstein on Oct 31, 2020 12:33:31 GMT -6
On Microphone (and tube mic) cables, I always terminate Pin1 to the XLR shell on BOTH ends. I have never had an RF problem in a mic. I have SOLVED friend’s RF problems by following this methodology as well. Bad pic attached....and that is just a piece of Cat5 solid-core copper that forms the easy bridge. NOTE: The pic makes it look like the bridge is to another XLR PIN but it is to the silver-colored shell connector on the top. Sorry. Those are Neutrik connectors which are a bit dodgy anyway. Use Switchcrafts which had an obvious solder tab to shell cround.
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Post by spindrift on Oct 31, 2020 13:51:17 GMT -6
On Microphone (and tube mic) cables, I always terminate Pin1 to the XLR shell on BOTH ends. I have never had an RF problem in a mic. I have SOLVED friend’s RF problems by following this methodology as well. Bad pic attached....and that is just a piece of Cat5 solid-core copper that forms the easy bridge. NOTE: The pic makes it look like the bridge is to another XLR PIN but it is to the silver-colored shell connector on the top. Sorry. Those are Neutrik connectors which are a bit dodgy anyway. Use Switchcrafts which had an obvious solder tab to shell cround. Different strokes...I don’t have a switchcraft connector in my studio.....all Neutrik and I love them. Hate switchcrafts, especially with phantom powered mics.
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Post by svart on Nov 2, 2020 13:21:31 GMT -6
In my old apartment I had a lot of RF creep into my mics. One time it was obviously happening from laying the cable onto the mic stand. After sorting that - and still hearing it creep in - I plugged a 25FT outdoor electrical cord between the PSU and the wall and the RF went away. Sometimes stupid things fix things. Like replacing a Surge protector. The ground pins were loose. Etc. The length of the ground essentually "tunes" the frequency of resonation. Adding more cable changed the channel, lol.
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Post by adamjbrass on Nov 2, 2020 15:56:21 GMT -6
In my old apartment I had a lot of RF creep into my mics. One time it was obviously happening from laying the cable onto the mic stand. After sorting that - and still hearing it creep in - I plugged a 25FT outdoor electrical cord between the PSU and the wall and the RF went away. Sometimes stupid things fix things. Like replacing a Surge protector. The ground pins were loose. Etc. The length of the ground essentually "tunes" the frequency of resonation. Adding more cable changed the channel, lol. Whatever the reason...it worked! And the channel was tuned back the the audio coming out of my microphone.
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Post by Ward on Nov 3, 2020 6:56:01 GMT -6
Actually, I guess there's no point in that. I don't get the RF with the Heiserman. It's got to be the Upton cable. Not necessesarily - The Heiserman may connect the audio and shell grounds together inside the mic. Sorry to 'correct' but . . . Also not necessarily the case. I loaned my H47 tube with both headbaskets out to a potential customer and he had to put the power supply in another room, away from all his other gear, to rid the interference issues. I honestly think PSUs are the source of a lot of noise. So is on-board phantom power. JMHO YMMV
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ericn
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Post by ericn on Nov 5, 2020 10:25:55 GMT -6
Not necessesarily - The Heiserman may connect the audio and shell grounds together inside the mic. Sorry to 'correct' but . . . Also not necessarily the case. I loaned my H47 tube with both headbaskets out to a potential customer and he had to put the power supply in another room, away from all his other gear, to rid the interference issues. I honestly think PSUs are the source of a lot of noise. So is on-board phantom power. JMHO YMMV PSU’s, cables and grounding are the usual causes, but ask any live guy, you never know till you know.
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Post by 126chris on Sept 3, 2021 17:46:44 GMT -6
I think I'm going to take Dave Wheeler up on helping me with this...but what causes this? Could it be a number of things and you just have to rule them out? I've got RF in my Upton...you can't hear it on playback, but it's annoying through the HPs Hey! I just got the Upton and I have the EXACT same issue... My friend also came over with his Heiserman and we had 0 noise/RF on his mic. Did you find a fix for it? Would love to know. Thanks.
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Post by Johnkenn on Sept 3, 2021 18:20:02 GMT -6
I think I'm going to take Dave Wheeler up on helping me with this...but what causes this? Could it be a number of things and you just have to rule them out? I've got RF in my Upton...you can't hear it on playback, but it's annoying through the HPs Hey! I just got the Upton and I have the EXACT same issue... My friend also came over with his Heiserman and we had 0 noise/RF on his mic. Did you find a fix for it? Would love to know. Thanks. I didn’t. It happens intermittently. Maybe wave can help
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Post by ab101 on Sept 3, 2021 20:19:50 GMT -6
My Upton is super quiet. Sorry, you are having this issue.
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Post by johneppstein on Sept 5, 2021 18:41:01 GMT -6
Think Faraday Tape could help? I actually bought the RFID fabric to try to put over the PS to see if it would work. I THOUGHT it did...but now I'm getting 99.7 pretty good again lol. Will this even work if I found the culprit? drbill I'm afraid that pin stuff is too smarts for me. Plus, I guess it could actually be the proprietary cable from the mic to the PS... www.amazon.com/TitanRF-Faraday-Tape-High-Shielding-Conductive/dp/B07DXDSCTFTry some of those ferrit beads, man I can’t count the times when those things made me look like genius! Don't belive those are "ferrit" beads. Ferrits arer small predatory animals, similar to weasels. I believe you want "ferrite" beads...
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Post by 126chris on Oct 24, 2021 11:28:18 GMT -6
Hey! I just got the Upton and I have the EXACT same issue... My friend also came over with his Heiserman and we had 0 noise/RF on his mic. Did you find a fix for it? Would love to know. Thanks. I didn’t. It happens intermittently. Maybe wave can help Hey, thought you'd like to hear that I sent it in to Upton Microphones and they fixed it! The cable had an issue and they replaced it with a new one and sent it back - works perfectly now. I would mention the radio FQ issue you are having and I'm sure he will have an idea as to how to fix it! Cheers!
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Post by Johnkenn on Oct 24, 2021 13:32:42 GMT -6
I didn’t. It happens intermittently. Maybe wave can help Hey, thought you'd like to hear that I sent it in to Upton Microphones and they fixed it! The cable had an issue and they replaced it with a new one and sent it back - works perfectly now. I would mention the radio FQ issue you are having and I'm sure he will have an idea as to how to fix it! Cheers! Yeah figured it was at the base of the connection in the screw on contraption.
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