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Electret Bias Resistor for FET
(41)
gm is the FET's transconductance. Typically 1 to 5 S (mA/) so 1/gm varies between 200 ohm and 1k. ... L'absence de virus dans ce courrier électronique a été

Jerry Lee Marcel
41
posts
Mar 5

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Stereo Max412 preamp
(46)
Roger: If it works after testing I will upload the board files On Tuesday, March 3, 2015 7:32 PM, "roger.barbara@bredband.net [micbuilders]"

w w
46
posts
Mar 4

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U 87 Clone Advice
(6)
I can attest to the microphone parts products. I own a U87 and have built a matched set of their CK-12 capsules using their electronics and a couple MXL donor

Jules Ryckebusch
6
posts
Feb 23

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Ricardo/D. McGgriffy's Simplest electret circuit
(8)
Oh, OK, thank you. I have removed my image to avoid confusing anyone else.

chconnor
8
posts
Feb 13

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Can't get a large condenser to work with this kit. Advice?
(8)
your new capsule probably needs 60volts dc polarisation voltage whereas the one which came with the kit could well be an electret which can run on a much lower

jack reynolds
8
posts
Feb 13

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correct capacitor to roll off highs about 150 cycles
(6)
Thank you guys. This is just what I wanted. I'll experiment with 5 to 10 mfd. And thanks for the formula. I'll let you know how it works. Best, Keith Cary,

Keith Cary
6
posts
Feb 10

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Inductors for Schoeps oscillator
(5)
... Many thanks! David

David Pickett
5
posts
Feb 8

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BM-700 Mod using TSB2555B and Alice circuit
(20)
I I have mistakenly said the diode was reverse-biased, which is wrong. It is indeed direct-biased, but the Vgs is very low on that type of FET that is

Jerry Lee Marcel
20
posts
Feb 4

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What condenser mic kit should I go for..?
(17)
Actually, I'm leaning against the FET microphone kit shipped by Microphone Parts. Much thanks to all the nice feedback I've gotten here. Another thing is the

per_normann@ymail.com
17
posts
Feb 4

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Choosing an electret circuit...
(13)
... Yes ... I would use a more robust diode, such as 1N400x. The turn-on current can be quite intense as the capacitor gets charged. ... L'absence de virus

Jerry Lee Marcel
13
posts
Feb 2

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Re: New file uploaded to micbuilders
(97)
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the micbuilders group. File : /Jules

micbuilders@yahoogroups.com
97
posts
Jan 31

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impedance matching transformers for piezo elements
(12)
Sorry, the recording is actually on this link: http://cl.ly/ZRdG/INE_Z023.WAV Jonas On 25 Jan 2015, at 15:21, Jerry Lee Marcel jerryleemarcel@sfr.fr ... ✺

Jonas Gruska
12
posts
Jan 25

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FEL 3.5 series
(15)
Hello, Thanks Ricardo. I have actually used a couple of those for fun and made some portable preamps for my two boys. Mr. Wurcer is clearly brilliant and

James McCanna
15
posts
Jan 23

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Scott Wurcer's Linear Audio articles available for download
(6)
Jim, could you send me an email. I have the originals maybe we could figure out an easy way to post an errata.

userno232000
6
posts
Jan 20

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New Allzweckflasche-V1.pdf file has been uploaded to the Micbuilders
(16)
Will be interested to hear how it turns out. Keep us posted. Kindest regards, zephyrmic

zephyrmic
16
posts
Jan 13
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