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#1
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Some Quick Mic Impressions : Josephson C42, MD441, AT 3060
So I had a chance to use these a little the other night. We were
recoding a jam/rehearsal in a basement room treated with real traps. The are my quick first impressions so far. If I have time to do more evaluations I'll add on. Mic Pres - True Systems Precision 8 Recording into an RME fireface to Cubase 48 kHz/24 bit Josephson C42 Drum Overheads Very nice, extended highs definitly a bit of a rise the upper response but in a good way. Cymbal tails were excellent and the hi hats really really sounded good. No EQ necessary. Great for rock or pop overheads and super on hi hats. Might be tiniest bit bright for some folks but I like 'em. Sennheiser MD441U Snare drum. Always seen this as a snare preference and wanted to find out for myself. Set the treble boost on and bass rolloff on a couple steps. This is probably the best snare mic I've ever used. Rejection of hi hats, cymbals and other drums was superb. With the treble boost on I didn't have to EQ the snare track at all to get a good sound. This mic has always been highly recommended and there is no doubt why. AT 3060 Phantom powered tube mic. I put this on my Bogner Shiva 1 x 12 combo which was on a stand. Mic about 8 inches away around the bottom of the speaker cone pointing towards the center. Very rich, nice midrange and no harshness. Worked well in this capacity. |
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#2
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Some Quick Mic Impressions : Josephson C42, MD441, AT 3060
wrote ...
AT 3060 Phantom powered tube mic. How do you phantom power a tube ("valve", aka. "firebottle") device? You can't draw enough power through the 6.2K resistors to heat up the filament? |
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#3
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Some Quick Mic Impressions : Josephson C42, MD441, AT 3060
"Richard Crowley" wrote in message
wrote ... AT 3060 Phantom powered tube mic. How do you phantom power a tube ("valve", aka. "firebottle") device? You can't draw enough power through the 6.2K resistors to heat up the filament? You can run some tubes on 48 volts, and it is permissable to use DC-Dc converters. |
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#4
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Some Quick Mic Impressions : Josephson C42, MD441, AT 3060
"Arny Krueger" wrote ...
"Richard Crowley" wrote wrote ... AT 3060 Phantom powered tube mic. How do you phantom power a tube ("valve", aka. "firebottle") device? You can't draw enough power through the 6.2K resistors to heat up the filament? You can run some tubes on 48 volts, and it is permissable to use DC-Dc converters. All true. But it doesn't explain how to get enough POWER through those 6.2K resistors to heat up the filament? |
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#5
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Some Quick Mic Impressions : Josephson C42, MD441, AT 3060
Richard Crowley wrote: "Arny Krueger" wrote ... "Richard Crowley" wrote wrote ... AT 3060 Phantom powered tube mic. How do you phantom power a tube ("valve", aka. "firebottle") device? You can't draw enough power through the 6.2K resistors to heat up the filament? You can run some tubes on 48 volts, and it is permissable to use DC-Dc converters. All true. But it doesn't explain how to get enough POWER through those 6.2K resistors to heat up the filament? It depends upon the tube used. There have been tubes that run on many voltages over the years. Not everything uses a 12ax7.. The 6418 tube is a subminiature wire leaded Pentode power amplifier. The filament voltage is 1.25VDC at 10 mA, and B+ is spec. at 22.5 VDC. Gm = 300 uMhos, plate resistance = 420K. http://www.audio-technica.com/cms/wi...39d/index.html |
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#6
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Some Quick Mic Impressions : Josephson C42, MD441, AT 3060
Richard Crowley wrote:
wrote ... AT 3060 Phantom powered tube mic. How do you phantom power a tube ("valve", aka. "firebottle") device? You can't draw enough power through the 6.2K resistors to heat up the filament? You use a hearing aid tube that is designed to run off a 22.5V photoflash battery and has minimal filament draw. At least, that is what Gefell does. I have not opened the A-T yet. If you do this, though, you get hardly any current drive. Either you need a solid state output stage, a stepdown transformer (leading to very low output level) or you get issues with long cable runs. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
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#7
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Some Quick Mic Impressions : Josephson C42, MD441, AT 3060
The AT uses a Raytheon hearing aid tube. Think I already posted the
basic specs. --yt Scott Dorsey wrote: Richard Crowley wrote: wrote ... AT 3060 Phantom powered tube mic. How do you phantom power a tube ("valve", aka. "firebottle") device? You can't draw enough power through the 6.2K resistors to heat up the filament? You use a hearing aid tube that is designed to run off a 22.5V photoflash battery and has minimal filament draw. At least, that is what Gefell does. I have not opened the A-T yet. If you do this, though, you get hardly any current drive. Either you need a solid state output stage, a stepdown transformer (leading to very low output level) or you get issues with long cable runs. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
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#8
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Some Quick Mic Impressions : Josephson C42, MD441, AT 3060
wrote:
The AT uses a Raytheon hearing aid tube. Think I already posted the basic specs. Wow. The Raytheon plant in MA shut down production of all that stuff in the late 1980s, so it must be NOS they are using. Some of those were pretty slick designs, too. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
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