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Post by tonycamphd on Apr 29, 2014 15:46:16 GMT -6
I cant believe this never registered in my tiny little brain before, but i'm burning in new tubes for my U47 clone, i went to move it a bit ago, and noticed how roasty toasty the headbasket was, it got me to thinking... hmmm, i should mount this mic headbasket down?.??.....?, heat rises... err...yes i should mount it upside down, especially considering i have a M7 pvc capsule in it, and im not particularly interested in shortening it's life span 8/ I don't know about you guys, but i leave my tube mics plugged in and on for extended periods, i think they sound better with a long warmup. I have of course mounted upside down before, but strictly for function, the heat thing was never a consideration until this light bulb moment 8/ Wouldn't this applly to all tube mics, we'd probably be better served NOT letting tube/electronics slow cook our capsules, or am i missing something and this is insignificant? thoughts?   |
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Post by wiz on Apr 29, 2014 16:22:10 GMT -6
I think less heat has got to be better than more
cheers
Wiz
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Post by wiz on Apr 29, 2014 16:22:28 GMT -6
PS
gorgeous mic!!!
cheers
Wiz
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Post by svart on Apr 29, 2014 16:23:50 GMT -6
Never really thought about it before. Sounds reasonable though. I generally mount mine upside down to give room for the talent and/or music stand for sheet music, etc.
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Post by jcoutu1 on Apr 29, 2014 16:32:24 GMT -6
Everything that I've read indicated that this is myth. The tube will get a bit warm, but not enough to damage the capsule.
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Post by RicFoxx on Apr 29, 2014 16:39:06 GMT -6
@tonycamp What DIY project is that??
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Post by tonycamphd on Apr 29, 2014 16:55:49 GMT -6
RicFoxx wiz oh lord, those are not my mics! those are real deals posted off of google images so i could show what i was talking about, sorry if i led you astray on that, my mic looks like a hockey puck in comparison to those lol, It's the MK47 circuit, it's currently housed in a GT2b body(not worthy of showing), i'll be getting a body from AMI tabfunkenwerk pretty soon, the MK47 with the blueline sounds really great and is totally worthy of a real deal house IMO. My PSU maybe cooler than an original? M16 military amo case   
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Post by tonycamphd on Apr 29, 2014 17:16:14 GMT -6
Everything that I've read indicated that this is myth. The tube will get a bit warm, but not enough to damage the capsule. could be? but a couple things are not myths, heat kills electronics(doesn't change with mounting position, so moot point on my part id guess), the mic gets pretty warm as 47's do. The second thing is pvc becomes more flexible with heat, stiffer when cool, that has to effect the sound? I just found this, and i guess thats all folks lol  |
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Post by Johnkenn on Apr 29, 2014 17:16:15 GMT -6
Yeah - If I ever do a U47 build...I'm going for the gusto on the body...
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Post by tonycamphd on Apr 29, 2014 17:30:34 GMT -6
Yeah - If I ever do a U47 build...I'm going for the gusto on the body... you know i usually don't care about the look on things, but i have to say, this mic sounds so good, it would probably sound better in a prettier house lol, but seriously, the acoustics of an accurate enclosure and headbasket, would have to make a difference. If you think about how sensitive the capsule is, the minute resonances in the mic body, and especially the headbasket, happen in VERY close proximity to the transducer, so yes, the original body's interaction with a source, has a direct impact on the sound character of the 47 IMO. The metal counts as well, i think the original 47 body tube was aluminum(if i'm not mistaken) |
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Post by Johnkenn on Apr 29, 2014 17:36:42 GMT -6
I know Mike Castoro went into exhausting (If you've ever talked to Mike, you know what I'm talking about  ) detail about how the headbasket affected the sound...I'm sure it does...but is it enough to really get in a tizzy over? Who knows. |
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Post by dandeurloo on Apr 29, 2014 23:16:22 GMT -6
Was always under the impression heat was the main reason you see tube mics mounted upside down. I know it's why I mount mine that way.
BTW, I spent all night building another 47 for a friend I think this is #7! They are amazing mics. Equinox has bodies back in stock Tony if you wasn't one of those. They are really nice.
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Post by Deleted on Apr 30, 2014 0:25:23 GMT -6
my CV4 gets warm the touch, but it ain't radiating heat waves like asphalt in summer... it's 10-15F more than the ambient room temperature.
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Post by cowboycoalminer on Apr 30, 2014 5:54:56 GMT -6
I mount my tube mics upside down for what it's worth. Don't know if it's right or wrong but it makes sense to me.
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Post by Deleted on Apr 30, 2014 6:00:49 GMT -6
Hi Tony,
as far as i know, people liked the upcoming heat from the U47 circuit to prevent condensed moist from singers' oath on the caspsules foil and give it a stable "tuning" due to a constant temperature... so the weak point of circuit heat became a strength of the mic.
Don't know if this is a myth, i never had one in my hand...
Best regards,
Martin
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Post by watchtower on Apr 30, 2014 7:57:32 GMT -6
Yes, tube heat is one of the main reasons people do this, but there's an old article on recordinghacks about this, and whether you're really saving your mics life. Keep in mind that heat supposedly affects the transformer as well (at least according to Oliver at AMI), so when you put the mic upside down, you're more just changing the "problem."
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Post by kidvybes on Apr 30, 2014 12:00:43 GMT -6
I cant believe this never registered in my tiny little brain before, but i'm burning in new tubes for my U47 clone, i went to move it a bit ago, and noticed how roasty toasty the headbasket was, it got me to thinking... hmmm, i should mount this mic headbasket down?.??.....?, heat rises... err...yes i should mount it upside down, especially considering i have a M7 pvc capsule in it, and im not particularly interested in shortening it's life span 8/ thoughts? ...Matt McGlynn at recordinghacks.com asked the same question with these results: recordinghacks.com/2013/02/22/your-tube-mic-is-upside-down/...and microphone guru, Klaus Heyne also chimed in on the subject, and more specifically in reference to the older PVC capsules: www.gearslutz.com/board/118779-post3.html |
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Post by tonycamphd on Apr 30, 2014 12:17:20 GMT -6
I cant believe this never registered in my tiny little brain before, but i'm burning in new tubes for my U47 clone, i went to move it a bit ago, and noticed how roasty toasty the headbasket was, it got me to thinking... hmmm, i should mount this mic headbasket down?.??.....?, heat rises... err...yes i should mount it upside down, especially considering i have a M7 pvc capsule in it, and im not particularly interested in shortening it's life span 8/ thoughts? ...Matt McGlynn at recordinghacks.com asked the same question with these results: recordinghacks.com/2013/02/22/your-tube-mic-is-upside-down/...and microphone guru, Klaus Heyne also chimed in on the subject, and more specifically in reference to the older PVC capsules: www.gearslutz.com/board/118779-post3.htmlHi Vibes, yeah, i re posted the Klaus post on page 1, as far as the recording hacks article is concerned (i skimmed), they left out a few important points, a U47 generates a LOT more heat than an apex 460, and a M7 is pvc. PVC(poly vinyl chloride) molecules dramatically loosen with heat, tighten with cold. And as a person who works with metals and welding, i can tell you heat migrates upward through metal, the more i think about this, the more i believe it matters, i'm going to do some personal testing with this on my U47 clone. As of now, all my tube mics will be inverted. |
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) detail about how the headbasket affected the sound...I'm sure it does...but is it enough to really get in a tizzy over? Who knows. 
