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Alice
I think the name Alice (in microphones) was created by Scott Helmke. If I remember correctly, it was based on 16mm capsule and a FET circuit. Now I see "Alice" all over in the mic DIY communities.?
By Mic Scharf · #33956 ·
Re: Pat's Mic (Fetzer Valve Mic)
Why do you need RD1 and RD2, wouldn't be one RD enough? Same for RS. Would we need a HexInverter or something else for the polarisation Voltage? With the OPA and the Fet and T1 could there be a
By Mic Scharf · #33955 ·
Re: Microphone w/ built in compression? ¡°Lamplifier¡±
Such a strange combination of uC, ASP/DSP and outdated tech. Seems ludicrous to me. I believe the absence of commercial success attests it. It will probably go in the gallery of irrealistic inventions
By Jerry Lee Marcel · #33954 ·
Re: Microphone w/ built in compression? ¡°Lamplifier¡±
https://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=8265304.PN.&OS=PN/8265304&RS=PN/8265304 Here is the patent if anyone is
By M H · #33953 ·
Re: Pat's Mic (Fetzer Valve Mic)
Homero, That's a really cool project and a nice tribute to Pat. Would love to hear a comparison to a regular mic. Thanks, -Scott
By Scott Helmke · #33952 ·
Re: Budget self-made condenser capsule (PCB based backplate!)
I¡¯m impressed! I look forward to your news of your progress! *Phil Manning* *www.foundry85.com <http://www.foundry85.com>** ~ classic recording studio* *www.artistpianocare.ca
By Phil Manning · #33951 ·
Re: Budget self-made condenser capsule (PCB based backplate!)
Dude, that is amazing! Excellent work. -- Best Regards, Jules Ryckebusch 214 399 0931 Linkedin <https://www.linkedin.com/in/jules-ryckebusch/>
By Jules Ryckebusch · #33950 ·
Re: Budget self-made condenser capsule (PCB based backplate!)
Here's the results of a triangle shaped capsule, inspired by Ehrlund. I've shaved off a lot of the parasitic capacitance and the output is definitely higher. It's still sounding pretty narrowband
By michaeljtbrooks@... · #33949 ·
transformer emulation?
following Homero's Fetzervalve thread, I'm wondering, is it reasonable to dream about emulating the coloration of a transformer on the output of a transformerless mic? Please take this from a studio
By Phil Manning · #33948 ·
Re: Pat's Mic (Fetzer Valve Mic)
I love this ¡°Fetzervalve¡± idea and would certainly build a couple - I regret that I¡¯m not very technical and have no ¡°feedback¡± to offer but I so appreciate this group (even though I mostly
By Phil Manning · #33947 ·
Re: Microphone w/ built in compression? ¡°Lamplifier¡±
I think that might depend on where this is introduced into the signal path... In the case of the Hammond circuit I posted above, the incandescent bulbs were fitted as two legs of the 'bridge' fitted
By Arjay1949 · #33946 ·
Re: Microphone w/ built in compression? ¡°Lamplifier¡±
Why would it?
By Jerry Lee Marcel · #33945 ·
Re: Microphone w/ built in compression? ¡°Lamplifier¡±
Would this technique not introduce a LOT of noise? On the marketing side of things though it is a treasure chest: one could tune and sell lamps for different pre-sets of compression ratio, attack and
By Dibutil Ftalat · #33944 ·
Re: Pat's Mic (Fetzer Valve Mic)
Thank you Germar! The final version of the PCB will be available as a PCBWay Shared Project. Just would like to have any feedback from the group before it goes
By Homero Leal · #33943 ·
Re: Microphone w/ built in compression? ¡°Lamplifier¡±
FWIW: I still use that technique to protect tweeters in DJ speakers... Op wo 13 apr. 2022 om 11:34 schreef Arjay 1949 <info@...>:
By Wim · #33942 ·
Re: Microphone w/ built in compression? ¡°Lamplifier¡±
This technique reminded me of the same thing that was employed in Hammond organs, back in the day (1960s/70s). They used light bulbs to 'limit' the drive to the inductive drivers on the spring reverb
By Arjay1949 · #33941 ·
Re: Pat's Mic (Fetzer Valve Mic)
Hey Homero, what a lovely way to remember P@T and a great idea too. I have only ever used the fetzervalve (FETs or Valve) as a guitar pedal and never would have dreamed of using it in a mic! Any
By Germar Tischler · #33940 ·
Re: Microphone w/ built in compression? ¡°Lamplifier¡±
No. They use small incandescent light bulbs. This type of passive limiter requires substantial level to operate. The signal from a microphone is too weak, so it must be amplified. That means there
By Jerry Lee Marcel · #33939 ·
Pat's Mic (Fetzer Valve Mic)
HI folks! As some of you may know, one of the dreams of our friend Patrick Davis (aka. P@T, Enjoybiking) was the idea of designing a mic that could have the "tube" sound, but that could also be very
By Homero Leal · #33938 ·
Re: Microphone w/ built in compression? ¡°Lamplifier¡±
... Said bulb, as it starts to glow, becomes higher resistance to signal, functioning as a form of audio compression... Probably a Vactrol optically-controlled variable resistance.? Like: vactrol:
By Tom Becker · #33937 ·