开云体育

Phantom Power 6.81K resistors...

Jules Ryckebusch All Messages By This Member #34004 I am at AES in Europe (which?is really fun) and a vendor approached me with a concept?of their?custom chip that supplies a constant current instead of using 48V and 6.81K resistors. It is here? Based on both Homeros and my own measurements of a FET based mic circuit and my OPA circuit I don't?see an issue that needs resolving. I kind of feel this is a solution looking for a problem.? Thoughts? Jules
Jules Ryckebusch All Messages By This Member #34005 Correction, I looked at the data sheet, it still uses the 6.81K resistors?but looks to maintain a constant supply to them. Again, I still don't?see a need. Jules toggle quoted message Show quoted text On Sun, May 8, 2022 at 7:34 AM Jules Ryckebusch via <ryckebusch=[email protected]> wrote: I am at AES in Europe (which?is really fun) and a vendor approached me with a concept?of their?custom chip that supplies a constant current instead of using 48V and 6.81K resistors. It is here? Based on both Homeros and my own measurements of a FET based mic circuit and my OPA circuit I don't?see an issue that needs resolving. I kind of feel this is a solution looking for a problem.? Thoughts? Jules -- Best Regards, Jules Ryckebusch 214 399 0931
Wim All Messages By This Member #34006 I've seen this discussed elsewhere a few times and everyone seems to agree with you. In the current economic climate I don't see this product taking off, but who knows? You just need a few big names behind it and a bit of luck in audioland to get to market acceptance. Op zo 8 mei 2022 om 07:42 schreef Jules Ryckebusch <ryckebusch@...>: toggle quoted message Show quoted text Correction, I looked at the data sheet, it still uses the 6.81K resistors?but looks to maintain a constant supply to them. Again, I still don't?see a need. Jules On Sun, May 8, 2022 at 7:34 AM Jules Ryckebusch via <ryckebusch=[email protected]> wrote: I am at AES in Europe (which?is really fun) and a vendor approached me with a concept?of their?custom chip that supplies a constant current instead of using 48V and 6.81K resistors. It is here? Based on both Homeros and my own measurements of a FET based mic circuit and my OPA circuit I don't?see an issue that needs resolving. I kind of feel this is a solution looking for a problem.? Thoughts? Jules -- Best Regards, Jules Ryckebusch 214 399 0931
Jules Ryckebusch All Messages By This Member #34007 开云体育 In the light of chip shortages I would be really hesitant to add to the BOM of a product for marginal benefits. ?They are optimizing something that is really in the weeds here. ? Best Regards, Jules Ryckebusch? toggle quoted message Show quoted text On May 8, 2022, at 07:52, Wim <objectief@...> wrote: ? I've seen this discussed elsewhere a few times and everyone seems to agree with you. In the current economic climate I don't see this product taking off, but who knows? You just need a few big names behind it and a bit of luck in audioland to get to market acceptance. Op zo 8 mei 2022 om 07:42 schreef Jules Ryckebusch <ryckebusch@...>: Correction, I looked at the data sheet, it still uses the 6.81K resistors?but looks to maintain a constant supply to them. Again, I still don't?see a need. Jules On Sun, May 8, 2022 at 7:34 AM Jules Ryckebusch via <ryckebusch=[email protected]> wrote: I am at AES in Europe (which?is really fun) and a vendor approached me with a concept?of their?custom chip that supplies a constant current instead of using 48V and 6.81K resistors. It is here? Based on both Homeros and my own measurements of a FET based mic circuit and my OPA circuit I don't?see an issue that needs resolving. I kind of feel this is a solution looking for a problem.? Thoughts? Jules -- Best Regards, Jules Ryckebusch 214 399 0931
Jerry Lee Marcel All Messages By This Member #34008 开云体育 I agree with all that's been written before. It's a very interesting intellectual challenge though. Brilliant piece of design. The claimed benefits are at least of second order. The test circuit they use to demonstrate performance is typical of the first transformerless preamps of the early 70's. The typical circuits used today, even in cheap products are way better than this crude one. Mating their chip with this outdated circuit does not make any sense. Le 08/05/2022 à 07:34, Jules Ryckebusch a écrit?: toggle quoted message Show quoted text I am at AES in Europe (which?is really fun) and a vendor approached me with a concept?of their?custom chip that supplies a constant current instead of using 48V and 6.81K resistors. It is here? Based on both Homeros and my own measurements of a FET based mic circuit and my OPA circuit I don't?see an issue that needs resolving. I kind of feel this is a solution looking for a problem.? Thoughts? Jules
Goran Finnberg All Messages By This Member #34009 Jerry Lee Marcel, >It's a very interesting intellectual challenge though. Brilliant piece of design.? Agreed. But the price versus gain in performance makes this a curiosity. >The claimed benefits are at least of second order. So slight as being of very little interest. Read this: https://groupdiy.com/threads/any-thoughts-about-true-phantom.70131/ The AKG A52 shown a bit further downwards I tried out in the 70?s but? heard no difference... the A52 has similar benefits to True Phantom. True Phantom png schematic further down: https://groupdiy.com/threads/any-thoughts-about-true-phantom.70131/page-2 Also the AES paper a bit further down from the above page. As is the AKG A52 schematic gif. The A52 also increases the mic loading to 13.6 kohm, as is true of the True Phantom, If the two 680 ohm resistors are increased to 6800 ohm. ----------------- Best regards, Goran Finnberg The Mastering Room AB Goteborg Sweden E-mail: mastering@... Learn from the mistakes of others, you can never live long enough to make them all yourself.??? -?? John Luther (\__/) (='.'=) (")_(") Ranglet, Aron, VovVov, Nero & Smurfen:RIP
Nick Roast All Messages By This Member #34010 Triton Audio (Fethead etc) and also based in the Netherlands have been marketing a True Phantom phantom power supply for some time: https://www.tritonaudio.com/true-phantom

Previous Topic Next Topic