spotforscott Posted October 31, 2018 Share Posted October 31, 2018 3 minutes ago, auricgoldfinger said: I was quoted £480 to upgrade a single rail SR7DRXL. I presume the amount varies depending on the build specification. At that cost, I would need to hear how about impact on sound from someone like Roy @romaz Link to comment
auricgoldfinger Posted October 31, 2018 Share Posted October 31, 2018 24 minutes ago, beautiful music said: So why do you think @paulhynes has this option in his PSU despite his goal is to supply the best PSU to his consumers? A Teflon circuit board reduces dielectric absorption in the regulator circuitry and the Vishay Z Foil ultra precision bulk foil resistors reduce resistor noise and thermal drift to very low levels. Who has real life expertise, Paul Hynes or marce? look&listen 1 Link to comment
mansr Posted October 31, 2018 Share Posted October 31, 2018 12 minutes ago, auricgoldfinger said: Who has real life expertise, Paul Hynes or marce? I'm pretty sure marce does. Link to comment
Popular Post auricgoldfinger Posted October 31, 2018 Popular Post Share Posted October 31, 2018 What brand of audiophile power supplies has @marce designed? Has anyone ever listened to one? Are any published reviews available? I would love to read them. @marce @mansr Why are you guys even on this thread? You don't own an SR7 and have no plans to buy one. You also have nothing of value to add to the discussion. sligolad, lmitche and Jiffi32 3 Link to comment
Popular Post beautiful music Posted October 31, 2018 Popular Post Share Posted October 31, 2018 5 minutes ago, auricgoldfinger said: What brand of audiophile power supplies has @marce designed? Has anyone ever listened to one? Are any published reviews available? I would love to read them. @marce @mansr Why are you guys even on this thread? You don't own an SR7 and have no plans to buy one. You also have nothing of value to add to the discussion. +1 Ralf11, auricgoldfinger and sligolad 2 1 Link to comment
marce Posted October 31, 2018 Share Posted October 31, 2018 2 hours ago, auricgoldfinger said: What brand of audiophile power supplies has @marce designed? Has anyone ever listened to one? Are any published reviews available? I would love to read them. @marce @mansr Why are you guys even on this thread? You don't own an SR7 and have no plans to buy one. You also have nothing of value to add to the discussion. How many people have designed and consulted on all aspects of PCB’s for 35 years and are IPC CID+ qualified? You don't listen to power supplies you listen to speakers... sligolad, Ralf11 and spotforscott 1 2 Link to comment
Speedskater Posted October 31, 2018 Share Posted October 31, 2018 When it comes to knowledge about circuit board design, I think that 'marce' is the first choice of all the members in this forum. It's been his day job for decades. spotforscott, Ralf11 and auricgoldfinger 1 2 Link to comment
marce Posted October 31, 2018 Share Posted October 31, 2018 3 hours ago, auricgoldfinger said: A Teflon circuit board reduces dielectric absorption in the regulator circuitry and the Vishay Z Foil ultra precision bulk foil resistors reduce resistor noise and thermal drift to very low levels. Who has real life expertise, Paul Hynes or marce? No argument over the resistors, where I have been for the last 5 weeks doing boards etc. they have the same issues with resistor drift etc. only on 35KV supplies for electron microscopes, but as I have said I would love to see some information on dielectric absorption on a PCB and its effect (if any) 50/60Hz PCB's. There's nothing wrong with using any dialectric you want, but you have to weigh up the costs against the benefits. Link to comment
rickca Posted October 31, 2018 Share Posted October 31, 2018 OK but I've never known PH to offer things that just increase the price without making a significant difference. spotforscott 1 Pareto Audio AMD 7700 Server --> Berkeley Alpha USB --> Jeff Rowland Aeris --> Jeff Rowland 625 S2 --> Focal Utopia 3 Diablos with 2 x Focal Electra SW 1000 BE subs i7-6700K/Windows 10 --> EVGA Nu Audio Card --> Focal CMS50's Link to comment
mansr Posted October 31, 2018 Share Posted October 31, 2018 3 hours ago, auricgoldfinger said: What brand of audiophile power supplies has @marce designed? You said real life. marce 1 Link to comment
pkane2001 Posted October 31, 2018 Share Posted October 31, 2018 1 hour ago, marce said: You don't listen to power supplies you listen to speakers... You've wandered into the wrong thread if you think that Johnseye 1 -Paul DeltaWave, DISTORT, Earful, PKHarmonic, new: Multitone Analyzer Link to comment
auricgoldfinger Posted October 31, 2018 Share Posted October 31, 2018 @Johnseye The thread is being hijacked. Please do something! Link to comment
Popular Post lmitche Posted October 31, 2018 Popular Post Share Posted October 31, 2018 3 hours ago, marce said: You don't listen to power supplies you listen to speakers This statement reveals a surprising lack of experience with digital audio. I am heading home looking forward to hearing a new power supply in my system. Should I expect it will sound the same as the old one? This is starting to remind me of the "all pizza tastes the same" absurd argument. spotforscott, Ralf11, look&listen and 2 others 1 3 1 Pareto Audio aka nuckleheadaudio Link to comment
Ralf11 Posted October 31, 2018 Share Posted October 31, 2018 2 hours ago, marce said: No argument over the resistors, where I have been for the last 5 weeks doing boards etc. they have the same issues with resistor drift etc. only on 35KV supplies for electron microscopes, but as I have said I would love to see some information on dielectric absorption on a PCB and its effect (if any) 50/60Hz PCB's. There's nothing wrong with using any dialectric you want, but you have to weigh up the costs against the benefits. some are listening to dialectic others use dielectric spotforscott 1 Link to comment
taipan254 Posted October 31, 2018 Share Posted October 31, 2018 2 hours ago, lmitche said: This statement reveals a surprising lack of experience with digital audio. I am heading home looking forward to hearing a new power supply in my system. Should I expect it will sound the same as the old one? This is starting to remind me of the "all pizza tastes the same" absurd argument. Uptone JS-2? Let us know if the schotkey diodes, r-core transformer, and traditional regulation outdoes the Sigma 11!!! I say this as I am mid-build into a sigma 11. Link to comment
lmitche Posted November 1, 2018 Share Posted November 1, 2018 1 hour ago, taipan254 said: Uptone JS-2? Let us know if the schotkey diodes, r-core transformer, and traditional regulation outdoes the Sigma 11!!! I say this as I am mid-build into a sigma 11. I have 8 to 10, I've lost count, AMB and Chinese Sigma 11s here. There is no way a Sigma 11 is going to sound better than a choke filtered lps like the JS-2, ever. taipan254 1 Pareto Audio aka nuckleheadaudio Link to comment
Popular Post marce Posted November 1, 2018 Popular Post Share Posted November 1, 2018 11 hours ago, auricgoldfinger said: @Johnseye The thread is being hijacked. Please do something! No I was just stating a fact regarding dielectric absorption and low frequency/DC designs where it has no effect on a PCB,this is a fact of physics... If manufacturers make a claim that is not supported by physics then we should be able to challenge it, I am sorry if some are offended by reality and the fact of physics but they cover every aspect of our hobby. It is similar to a comment that dielectric absorption was a possible cause in the difference of DC cables... dielectric absorption has no effect at DC and if you look at the figures for its effect on PCB's the graphs go up to 70GHz, the losses even at 10GHz are barley 0.5dB There is already enough myths and misunderstanding of physics in this hobby as it is. This is my last post on this, believe what you want, it wont make it true. beautiful music, jabbr, mansr and 1 other 4 Link to comment
Johnseye Posted November 1, 2018 Author Share Posted November 1, 2018 I value @marce 's opinion. It's especially relevant to the SR7 since Paul will be selling a "Teflon circuit board to reduce dielectric absorption in the regulator circuitry and Vishay Z Foil ultra precision bulk foil resistors which reduce resistor noise and thermal drift to very low levels." I think this begs the question of why @paulhynes would begin selling a board intended to reduce dielectric absorption and why they are even made in the first place if marce is correct. And for the record I am open to and look for people's experience as guidance. I also value science and engineering, perhaps even more so when it's applicable. I am in the camp that believes strongly that our music is influenced by power supplies. Knowing marce's work on EMI/RF and how that impacts sound I'm wondering if he meant something different. Audio System Link to comment
octaviars Posted November 10, 2018 Share Posted November 10, 2018 Anybody here that know the size of the chassi for the SR7MR4 PSU cant find it anymore? Main system TAD D1000mk2, TAD M2500mk2, TAD CE-1, Ansuz Mainz 8 C2, Ansuz Darkz D-TC, Qobuz Studio -> Roon ROCK on NUC -> Uptone etherREGEN -> dCS Network Bridge -> AES/EBU -> DAC HD Plex 200W PSU (4 rail for ISP fiber, router, etherREGEN and NUC) Second system Qobuz Studio -> Devialet Silver Phantom, Devialet Tree Link to comment
auricgoldfinger Posted November 10, 2018 Share Posted November 10, 2018 1 hour ago, octaviars said: Anybody here that know the size of the chassi for the SR7MR4 PSU cant find it anymore? The last information I have is W = 224mm, H = 130mm, D = 346mm but you should check with Paul if it is really important. octaviars 1 Link to comment
Popular Post paulhynes Posted November 12, 2018 Popular Post Share Posted November 12, 2018 Sorry for the tardy reply, I am still dealing with the move to the new premises. The Vishay Zfoil bulk metal foil resistors are very close to the ideal resistor. The foil layout is designed to cancel inductive and capacitive effects and the foils have very low noise, close to the theoretical noise of the resistance value of the resistor. The resistor tolerance is 0.01% with a temperature coefficient of +/-0.5ppm, which reduces circuit parameter drift and thermal drift. Regarding Dielectric Absorption, Walt Jung and Dick Marsh wrote an article published in Audio magazine as far back as 1980, covering the subject when related to the sonic effects of capacitors used in audio circuitry. This captured my interest at the time and I was able to hear the audible differences the various capacitor dielectrics created during my capacitor substitution tests. The following link should take you to Yumpu.com where registration will allow you to download a PDF file covering the text of the article. https://www.yumpu.com/en/document/download/27191293/84864-0407f-737e0-ab399-53a1b-1d0d7-1c428-26398 It should be noted that Walt Jung and Dick Marsh are regarded as eminent electronic engineers and they are well qualified technically. They are also audio enthusiasts who have an open mind and are prepared to investigate audio anomalies in real time instead of just making assumptions based on incomplete theoretical data. It occurred to me that the DA characteristics displayed in the various capacitor dielectrics could also apply to PCBs (printed circuit boards), as they are effectively a dielectric material with copper tracks bonded to the surface. There will be capacitive effects between the tracks and the dielectric across the printed circuit board and it is logical to assume that the sonic signatures of the various PCB materials due to dielectric absorption will also be audible. As Teflon was considered to be the best of the dielectrics I decided to investigate the use of Teflon PCBs in my audio designs. In every area of signal processing and power supply the Teflon PCBs outperformed the normally used fibreglass (FR4) PCBs. I have been using Teflon circuit board ever since in critical high performance designs. Unfortunately it is quite expensive and therefore not suitable for inclusion in lower cost products. Out off interest regarding power supplies, their operating frequency is not just limited to the 50/60 Hz mains frequency, nor is the current flow within the power supply circuitry static, as the equipment under power will demand current dynamically at whatever frequency it operates at. Lastly I am not in the habit of offering upgrades that have no merit. PS. The SR7 chassis size is correct. beautiful music, Tand, Jiffi32 and 5 others 1 4 3 Design and manufacture of high performance power supplies Link to comment
oilpaint Posted November 26, 2018 Share Posted November 26, 2018 Has anyone with builds in the queue heard from Paul lately? Link to comment
auricgoldfinger Posted November 26, 2018 Share Posted November 26, 2018 38 minutes ago, oilpaint said: Has anyone with builds in the queue heard from Paul lately? He's not responding to my emails. Link to comment
Popular Post paulhynes Posted November 27, 2018 Popular Post Share Posted November 27, 2018 I am still dealing with the move to the new premises. There were initially delays with getting the carpets cleaned. Then the custom frames for all the workbenches and office tables were delayed in transit via a local forwarding agent. One key ingredient for these was finding enough extrusion couplings for the extrusions, as agents for these products were out of stock, world-wide. I managed to finds some from several different sources and they arrived last week, so I was busy assembling them for the rest of the week. The Beech wood worktops have now been varnished to seal and protect the surface and have been fitted to the bench frames. The varnish will take a couple more days to cure before I can place equipment on the worktops. I am currently transferring equipment over to the new premises ready for installation and then all the materials stock for current orders will be transferred. Then I will be starting custom build 18 and my assistant will be catching up with his work on the SR4 products. There is a lot still to do and I will have to catch up with e-mail once the move is completed. Regards Paul rickca and auricgoldfinger 2 Design and manufacture of high performance power supplies Link to comment
spotforscott Posted November 27, 2018 Share Posted November 27, 2018 @paulhynes Thanks for the update Link to comment
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