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Re: Input protection for OPA1642 for Piezo use. Oh, and Humpback Whales
Thanks Arjay. This is from the Data Sheet: "Input pins are diode-clamped to the power-supply rails. Input signals that can swing more than 0.5 V beyond the supply rails must be current-limited to 10
By Jules Ryckebusch · #36108 ·
Re: Input protection for OPA1642 for Piezo use. Oh, and Humpback Whales
On Tue, Feb 6, 2024 at 01:45 PM, Jules Ryckebusch wrote: > > I Just had a really cool adventure recording Humpbacks with my > hydrophones. See this: https://youtu.be/XrURPtL9zuk > > One challenge
By Arjay1949 · #36107 ·
Re: Input protection for OPA1642 for Piezo use. Oh, and Humpback Whales
Hi Jules Many thanks for sharing the video! Yesterday I was (re)searching on the topic of bioacoustics and came across the following open access book that might be of interest to you. Exploring
By Heinz · #36106 ·
Re: Input protection for OPA1642 for Piezo use. Oh, and Humpback Whales
Thank you!
By Jules Ryckebusch · #36105 ·
Re: Input protection for OPA1642 for Piezo use. Oh, and Humpback Whales
Awesome thank you so much! Just read your publication on AES btw, great work! wrote:
By Dude · #36104 ·
Re: Input protection for OPA1642 for Piezo use. Oh, and Humpback Whales
I am using Schottky Diodes 40V ones https://www.mouser.com/ProductDetail/Diotec-Semiconductor/BAS40?qs=OlC7AqGiEDl%252BJK%252BMzfl3Mw%3D%3D I based this on a EDN article on for input protection.
By Jules Ryckebusch · #36103 ·
Re: Input protection for OPA1642 for Piezo use. Oh, and Humpback Whales
Hey there Jules, thank you for the update. I have put together many of your boards since you started with the opa Alice, and I have just started with the smaller piezo SMD boards, very lovely
By Dude · #36102 ·
Input protection for OPA1642 for Piezo use. Oh, and Humpback Whales
I Just had a really cool adventure recording Humpbacks with my hydrophones. See this: https://youtu.be/XrURPtL9zuk One challenge was the failure of two of them post build. I also had a couple board
By Jules Ryckebusch · #36101 ·
Re: Reducing the sensitivity of electret capsules with built-in fet
I¡¯ll post some a link to the raw files and a reaper session later today Best Regards, Jules Ryckebusch
By Jules Ryckebusch · #36100 ·
Re: Reducing the sensitivity of electret capsules with built-in fet
Jules, Very interesting recording! I have the impression that YouTube distorts the sound of the high tones of the hi-hats. Any possibility to listen the hi-rez audio of
By Andrzej Sochon · #36099 ·
Re: Vintage Victor HM-200 binaural headphone - How to open?
Hi kennjava Thank you for your answer and the story about your binaural experiments! I sometimes record from vinyl and listen to cassette tapes in the car quite often. I have some cassettes that
By Heinz · #36098 ·
Re: Vintage Victor HM-200 binaural headphone - How to open?
Hi Heinz. Thanks for the follow-up, the pictures, and the link to the binaural review. I didn't realize that the HM-200 incorporated a sort of pinnae or directional body shape. Interesting. Yes,
By kennjava · #36097 ·
Re: Vintage Victor HM-200 binaural headphone - How to open?
Many thanks for your replies and your interest in this topic. Because of the discovery of Johan (I don't perceive the typical hole in the middle¡­) I would like to follow up a little. I think it's
By Heinz · #36096 ·
Re: Vintage Victor HM-200 binaural headphone - How to open?
Dear Heinz, One more thing...Wind is a nightmare, more sensitive capsules means more wind sensitivity. Wind-shields could help but may dump clearness. Good luck with your experiments.
By Andrzej Sochon · #36095 ·
Re: Vintage Victor HM-200 binaural headphone - How to open?
Thanks for the kind words Heinz. Your recordings and the info triggered my interest in (semi) binaural recordings again. I did experiments 15 years ago with some Aevox Audio mics - a brand I rand for
By Johan Vandermaelen · #36094 ·
Re: Vintage Victor HM-200 binaural headphone - How to open?
Andrzej is wise, and if tho HM-200 still works properly, and? keeping it in?its original condition is important to you, then yeah, leave it alone.... If they were mine, though, would open them up
By kennjava · #36093 ·
Re: Vintage Victor HM-200 binaural headphone - How to open?
Many thanks for the information. You're right. I'm missing the foam windshields. I'll try building new ones. The Victor HM-200 on eBay seems to be way overpriced. There's one on Yahoo Auction in Japan
By Heinz · #36092 ·
Re: Vintage Victor HM-200 binaural headphone - How to open?
It appears this device is also known as the JVC HM-200e. more info on this site: https://www.audiovintage.fr/leforum/viewtopic.php?t=40732 I don't know if your specimen has the foam windsceens, that
By Pierre Olivier · #36091 ·
Re: Vintage Victor HM-200 binaural headphone - How to open?
Many thanks for your opinions. I really appreciate your thoughts! Last year I read a lot about the World Soundscape Project ( https://www.sfu.ca/sonic-studio-webdav/WSP/index.html ) , Soundwalking
By Heinz · #36090 ·
Re: Vintage Victor HM-200 binaural headphone - How to open?
Dear Heinz, Listen to the timid advice of the old "fixer". If something is old and works well, it is best not to disassemble it... Your recording is great, I would like to have headphones like
By Andrzej Sochon · #36089 ·