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Old 10th May 2002, 09:10 AM   #1
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Default mic preamps

i looked and didn't find many threads about mic preamps. is this off-topic?
i was just wondering if anyone had any ideas ,links, experience on the subject.
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Old 10th May 2002, 10:43 AM   #2
sonnya is offline sonnya  Denmark
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Try www.analog.com under applicationnotes find the part of the page with audio.
I find Mic-preamp interresting and i do not think this is off topic.

Sonny
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Old 10th May 2002, 09:52 PM   #3
haldor is offline haldor  United States
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Rod Elliot has a discrete mic preamp project on his web-site http://sound.westhost.com/project66.htm

PAIA has a mic preamp kit you can buy (plus schematics are downloadable from their website) http://www.paia.com/

Analog Devices use to make a chip that was specifically designed for use as a mic preamp, the SSM2017. Here is the data sheet http://wwww.ges.cz/sheet/s/ssm2017.pdf I made small battery powered dual mic preamp for my Minidisc recorder from the reference design in the data sheet and it works well. This part is in a bunch of Rane's pro sound products, you can download schematics from their website. http://www.rane.com/

Note: Analog Devices stopped making the SSM2017 two years ago. If you want to try them and can't find any, I stocked up on a tube of 25 of them right as there were being obsoleted and could spare a couple.

Drop me an email if you are interested.

Phil
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Old 11th May 2002, 07:28 AM   #4
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If you're looking for a substitute for an SSM2017, check out the THAT 1510. I don't know if they're any easier to get, though. THAT Corp. says samples will be available end of Q2 '02...

The old National Semiconductor apps books from the '70s and '80s had a few balanced mic preamp circuits using a differential pair front end to a chip op amp, which you could improve upon with a few judicious component upgrades. Most of these should be available at the National web site.
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Old 11th May 2002, 08:13 PM   #5
haldor is offline haldor  United States
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Hi Chucko,

Thanks for the link to That Corp. Analog Devices killed most of their pro audio specific chips 2 years ago and it's great to see somebody picking this market up.

Wonder who distributes them in the US?

Phil
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Old 13th May 2002, 02:08 AM   #6
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Default Mic Pre

Audio amateur recently published an article about a tube mic preamp by Paul Stamler(2/3/4, 2002). It seems to be quite a high-end thing. He also did a two part article in AA in Issues 3 & 4, 1995. This one was about solid state circuits for mic preamps and mixers. Very good article with much discussion about the design decision-making. Stamler is obviously a very knowledgeable guy. Highly recommended reading.

Back issues from Audioxpress.

I want to do one (or a few), but can't yet start since I've got other things underway.
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Old 13th May 2002, 02:27 AM   #7
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Default Re: Mic Pre

Quote:
Originally posted by vpharris


Back issues from Audioxpress.
was that supposed to be a link?
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Old 20th May 2002, 05:59 PM   #8
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Default Stamler articles

No... I meant "back issues are available from Audioxpress."

Here's their URL: http://www.audioxpress.com

They really want to sell complete sets from previous years, but if you call them, they may be willing to sell specific issues; not sure.

Either way, it's a great magazine for DIYers.
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