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About gstew

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    Rabid Audio Tweaker & DIY'er

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    MS, US

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  1. @Superdad, Absolutely. Sorry for starting it in this thread. Could you move the relevant posts to a 'EtherRegen Power and Cable Experiences' thread? OR if it is better (and can be done), I can start that thread and you could move the posts there afterwards. Let me know. Greg in Mississippi
  2. @cat6man, first, my apology... it is mpaudio.net. I have edited my post above. Back when he started he sold un-populated boards on DIYAudio. I bought several of these. The ones on his website today that are closest to what I built are his MD-HPULN PS. The boards I used are an earlier version of this. I modify them by not populating the rectifier diodes as I feed it DC. You could also use his DC-input-only SD-HPULN. As I populated them myself, my builds are a bit different than stock. The LT3045 regulators and associated chip caps and resistors are nearly identical to his products. Instead of a pot on each side to set the voltage out, I use an SMD 33K resistor (that gives 9.85V... 33.4K will get you closer to my 10V target) that I solder across the input/output through-holes where the pot would go. I use electrolytic caps that I've had good results with in other builds, United ChemiCon KYB series. AND I directly solder some high-current connectors onto the board at the input and output sides. If you went for an SD-HPULN from him or an MD-HPULN setup for DC input, replaced the pots with 33K or 33.4K precision resistors (leaded resistors would work as well and be easier to use... also ask, he may be able to do this if you are not comfortable with soldering), paralleled the outputs, and fed each input with an LPS-1.2 set to 12V, your results would be very similar to mine. Greg in Mississippi
  3. That was how I felt for the first 3 or so days. BUT last night I put in my target power setup for the ER... 2 LPS-1.2's set to 12V with each feeding 1/2 of an MPAudio.net dual-section 3||LT3045 regulator board with both halves set to 10V (using .1% resistors to keep them REALLY closely mattched) with the outputs tied together to parallel the LPS-1.2 outputs. This is a setup I have used with much success to power sources such as RPi's, Allo's USBBridge SIgnature, and my SDTrans384 SD Card Player. Compared to a good 2A-3A linear supply 1 LPS-1.2 seemed to have lessened dynamics although it clearly had quieter backgrounds and more clarity. Paralleling 2 this way brought the dynamics into parity with the AC-connected supply with no negative impacts. Using this setup replacing either the stock SMPS OR a good (but not great) linear supply turned my ER into a dynamics and emotive expression MONSTER!!!! AND kept all the subtleties and increased bass definition and separation between instruments / voices and greater harmonic density and etc etc etc... BUT turned them all up to 20! Longer report in the next few days. I didn't think I could be this happy with a single upgrade! Edit... and as Dutch said below, the DC-DC converter John/Alex uses does not behave the same as a linear regulator. It will run about the same temp or even lower with a higher voltage input. AND the voltage to the downstream linear regulators will always be the same As far as the sonics with a different supply, see above! Greg in Mississippi
  4. As of now I only have about 40 hours of runtime on the EtherRegen. So far I am very happy with what I hear but want to have >100 hours before I post a detailed report. I've had one fairly minor operational glitch that I've not had a chance to troubleshoot. I haven't seen that anyone else is using a similar HS setup, so it may be specific to my HW or it's configuration. As such & as I have a very simple workaround, I'm not worried about that. I can easily run the workaround forever with no operational impact. More in a few days. But based on what I've heard so far, it will be a positive report, the only question is how glowing. Greg In Mississippi P.S. My read of the comments so far is that it will take some time for the EtherRegen user community to settle on the best use cases & optimizations in including overall system architectures, power, cabling, use of optical links or not, etc. AFAIK, the EtherRegen is a new & unique concept & implementation. Things won't always work as expected and that has already been reported. So don't take the current reports as the final words.
  5. Sorry Alex, I already wrote this post in my head and wanted to capture it while the topic was fresh. I hope you move this all to a new thread to keep the conversation(?) flowing. In my mind, these comments along with a few others about closed minds are the crux of the matter. I say there are 2 types of audio engineers: - Those that are open to hearing differences and accepting of others reports even when there is no 'accepted' explanation for what they heard or was reported. AND they use their knowledge, experience, and skill to identify the mechanisms and quantify the differences and use their knowledge to produce improved audio gear. - Those who know they understand all there is about audio and our experience of it. They spend their time denying any differences occur outside of their knowledge and use their knowledge to convince those who hear differences that they REALLY can't be hearing what they report, they are lying to themselves and others, and BTW, did you do a blind-test? John Swenson is an excellent example of the first, though there are many others in that realm that I follow, respect, and appreciate. The folks at ASR (and some here) fit the second type. AND AFAIK, have no real value in what I consider 'high-end' audio. In addition, I hope they will look at an I2S version of this tech for use with PS Audio I2S over HDMI, for use with SBCs that output I2S like Raspberry Pi's and the multitude of DAC HATs available out there AND us DIY'ers who like to play with them, and for licensing and incorporation into others' products. Finally, a timely commentary on measurements and sonics by Paul McGowen of PS Audio from today: https://www.psaudio.com/pauls-posts/measure-well-sound-bad/ Greg in Mississippi P.S. EtherRegen sounding good in my 2 setups, but I want to give it more break-in time and more listening before I report.
  6. I am running a USBBridge Signature quite nicely with an EtherRegen since Tuesday. Greg in Mississippi
  7. +100 to @matthias' comment's on the USBBridge Sig. I'm using RPi's as I2S sources for I2S DAC Hats like Allo's Katana and Ian Canada's boards. Even with Ian's FiFoPi in the circuit, replacing a stock RPi with a USBBridge Signature is a very significant upgrade across the board. I also have a couple of RPi 2B's I modified for all linear regulation for the 1.8V & 3.3V rails using LDOVR.com's Mezzanine board. The USBBridge Sig's better them too. One thing I haven't tried yet are larger DAC setups (Soekris, Twisted Pear) where they also have I2S reclocking (Soekris in the FPGA, my Twisted Pear setups with Ian's larger FIFO). BUT those also worked better with linear-regulator-modified RPi's over stock RPi's, so I expect an improvement on those too. Greg in Mississippi
  8. John and/or Alex, I just re-read the great description a few posts above and had a thought. Will the "four Gigabit "dirty-side" RJ45 Ethernet "input" jacks" connect to a non-Gigabit source? I know from a previous answer the SFP module is Gigabit only... will I have to have a Gigabit source to connect to the "dirty-side" RJ5 jacks? Likely a dumb question for those who know more about networking than I (and I thought I could get along ok, but am learning there's a LOT I haven't encountered yet). Greg in Mississippi
  9. See this thread for info on Allo's replacement, their USBBridge Signature: https://www.diyaudio.com/forums/vendor-s-bazaar/337859-shanti-dual-lps-5v-3a-5v-1-5a-7.html It is a mostly RPi-compliant device, so will work with all of the available RPi distros / player SW sets. Support effort required from Allo should be much lower, the only non-compliant part (from what they've released so far) is the need to install a USB driver for their HW configuration that also fixes the issue with USB versus Ethernet resource conflicts on the stock RPis through the 3 (fixed now on the 4). They did make a comment about support for the USBBridge continuing for some time... see post # 308. I figure the original USBBridge will end up being a lot like my Sony HAP Z1-ES... no new firmware/SW updates likely, will work with existing externalities for some time, but nothing new. So still a functioning device, but not keeping up with new developments. That's the reality of HW! Personally, I'm pretty excited about Allo's USBBridge Signature. It is like an RPi-based Sonore Ultra-Rendu, but able to run any RPi-abled Distro/SW sets. Will be interesting to see how it fares in the marketplace. BUT for people using the RPi to get an I2S signal to feed to DIY DACs like myself (or others using an I2S->HDMI module to feed to a DAC like a PS Audio Directstream) it should be about as good as we can get. Greg in Mississippi
  10. BUMMER on the EtherPCB! Consider it a request! HURRAH on the EtherRegen price. $$$'s are itching a hole in my bank account waiting to buy one! Greg in Mississippi
  11. Alex, Thanks for this... and sorry for my slow response. I haven't used the LT304x regulators in analog-only circuits much either. My main use for them has been in mixed circuits (I consider anything that is generating or otherwise processing an I2S signal to be mixed, such as an isolator board, a reclocking board, or a DAC... which of course produces an analog output). There I mostly use boards purchased from poster OPC on DIYAudio (back when he was still selling boards) or MPAudio (back when he sold raw boards instead of just finished units). OPC's board are two sections of 4-paralleled LT3042, MPAudio's are either 2 sections of 3-paralleled LT3045 or a single section of 6-paralleled LT3045. All of these boards have positions for through-hole electrolytic caps before and after the regulator section. OPC listed caps from the KYB line of United ChemiCon in his BOM. I found they worked so well with his boards that I've adopted them as my go-to standard for this purpose (where I'm not dipping into my dwindling hoard of Black Gates). My experience with them is that AFTER they go through a moderatly-long break-in, they are fairly neutral (moreso than my experiences with the Elna Silmec and Panasonic FC, which may have been a-typical) with good dynamics (better than most of the Nichicon lines I've tried). The ESR of the particular KYB's I generally use at the input of the board are a tiny bit lower than the Panasonic FC you specified. In some cases I'm feeding them from AC-connected raw DC supplies that use Jensen 4-pole caps after the rectifiers (sometimes a bridge, sometimes a center-tapped transformer with a 2-diode full-wave setup). I have looked for the ESR of those caps and haven't found it specified. So even though the literature suggests they are low-ESR, I doubt it if they won't print the value. In other cases, I'm using a 2-section board (either OPC's or MPAudio's) to parallel Uptone Audio's LPS-1/1.2's for higher current applications. Honestly, for those uses I did at one time have a current-matched pair of LPS-1's. Comparing using the 'twins' direct to the load versus paralleled through an OPC dual-section 4||LT3042 board, I preferred the latter. AND I find MPAudio's boards used in the same mannter generally produce better results than the OPC boards, I'm assuming due to the different regulator chip. AND I've heard similar results with various caps in both mixed circuits and in fully digital circuits. Good to have that confirmed by someone I trust. Many thanks! Greg in Mississippi
  12. @Superdad... Might this comment from John in one of the Sonore threads possibly mean we'll see an EtherPCB to go with our EtherRegens? Inquiring minds wanna know. Greg in Mississippi
  13. Thanks John (and Alex for your additional clarification). So I can connect any of the RJ45 ports on the EtherREGEN to the RPi ok. Kewl. AND if I got a gigabit optical FMC, I could use that to connect to the optical port, correct? Not sure if it'll be worth it, just checking. Greg
  14. Lets try that link again... https://www.amazon.com/gp/product/B01663TTCE/ref=ox_sc_act_title_1?smid=A3KXHMB5SA7Q9Z&psc=1 AND it probably helps if I also link to the specific Delock FMC I have: https://www.reichelt.com/us/en/de/en/media-conv-100base-fx-sc-mm-1310nm-2km-delock-86444-p175548.html?r=1 SO one question is if the wired Ethernet port of the EtherRegen will work ok into the 100 Mbps RPi. Going back through this thread, it sounds like it will. Let me know if I misread and it won't. So then the other question is what would be a good optical SFP module compatible with the Delock and would the linked adapter cable work. Better? Greg in MIssissippi
  15. Alex / John (or anyone more networking-aware than I am who can answer...), I'm as eager as anyone to get my hands on the EtherRegen. My audio-only computer audio setups are fairly simple yet moderately refined... RPi 2B endpoint with various I2S-connected DACs, receiving Delock FMC, sending Trendnet FMC, ZyXEL switch, Zotax ZBox PI320-W2 nano-PC as a music-file server, and a WiFi router configured as a Wifi endpoint to provide wireless control connectivity. No streaming, no internet connection at all, all devices have linear supplies, somewhat optimized (but primative compared to many of the recently hot setups). I've started taking a look at what configurations I'll try at first. I can see 3 useful configurations: - Moving the Delock FMC to the sending side and using the EtherRegen as a final optical to wired ethernet converter, retaining the ZyXEL switch and keeping everything else as before. - Removing the optical links entirely and replacing the ZyXEL switch with the EtherRegen where the sole "B" side port would provide the Ethernet connection the RPi and everything else is connected to the "A" side. I have 2 questions about using the EtherRegen in these ways: 1. Of course the RPi 2B is limted to 100Base-T 100 Mbps. I'm assuming the wired ports in the EtherRegen will auto-negotiate down to this, but thought I'd ask to be sure. Truth? 2. To use the EtherRegen as an optical networking endpoint, I'll need an appropriate SFP optical module and an adapter cable. I believe this adapter cable will suffice to go between the DeLocks and an appropriate SFP optical module: - https://www.amazon.com/gp/product/B01663TTCE/ref=ox_sc_act_title_1?smid=A3KXHMB5SA7Q9Z&psc=1 BUT what SFP optical module will work ok? TIA! Greg in Mississippi
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