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Addicted to music

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Addicted to music last won the day on February 7 2018

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About Addicted to music

  • Birthday 07/06/1964

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  1. As said, it’s the electrical conventional way to show where it flows regardless AC or DC, it’s not wrong as you have indicated
  2. Don’t get too exited on a EMI monitor that buzzes……. And you have no idea what harmonics are involved but just the amplitude…. I’ve said this all along in every posts on SNA that regardless of RF and EMI that nearly every electronic audio device connected to mains 230VAC 50hz will have a step down isolating transformer followed by a full bridge rectifier and then a set of electrolytic caps on the end for smooth filtering. It’s this thatisolates any RF/EMI you throw at it. If you still have issues with “hum/EMI/RFl” that’s audible look elsewhere. Valve gear are the worst for being susceptible to noise when they stick out like safety cones and are not protected in a faraday cage….. Heres a set of tests that proves that filter caps will shut a lot of BS marketing down….Amir generates a dirty mains on a Topping product, look at the result he gets on the FFT of the audio output, it hasn’t changed: https://www.audiosciencereview.com/forum/index.php?threads/impact-of-ac-distortion-noise-on-audio-equipment.25501/
  3. No it’s not, it shows typical electrical convention where the active live flows and it will be same as DC
  4. considered the WAP path too…. I stand corrected but most who have done it says speed is reduced. Also considered ethernet over main but didn’t go that route. This is not the case for a mesh or a Orbi system the throughput is what I get at the point of entry so for me it’s 100/40 that’s the Max for FTTC NBN. The Orbi for me was a perfect solution, like @Snoopy8 I haven’t had one issue apart from nbn dropping out and I’ll get a notification from Aussie Broardband to say the service is down.
  5. Definitely take @Snoopy8 advice, I also have the Orbi and never looked back. I ran a Billion 7800 until I got FTTC NBN 100/40. I also have 300m cat 5 roughed in during the build. Was about to use all the ethernet connection and the Orbi has made it redundant…. I have the satellite unit diagonally up stairs and on the 1st floor about 13m I get @nbn speeds with a slight increase in ping… The Orbi is wifi done right.
  6. I use the OPPO105 not as a network streamer but just a music server…. The files I play are on a 2T HDD. It goes directly into the USB and I use a iPad to select, I haven’t tried using it as a streamer, so when the time comes I’ll look at how to proceed. Maybe removed the Audio DG reclocker and go direct or some other means.
  7. I go for option 2, because a USB printer cable is all I need and a Topping Dac is in my possession….awesome combo for the money! Have no desire for anything else and I’ve heard some really expensive combos
  8. There’s a huge difference in quality and precision between this tuner pcb and the pcb I’ve posted earlier. Totally different solder technique, notice the precision on some of the components that are soldered, especially down to the components that a fraction of the size of SMD that’s presented in the pics that I’ve posted earlier compared to this tuner pcb…. If you enlarge the my earlier pic and find R61 and C65 that are a fraction of the size compared to here on your tuner pcb. I would say that at 7yrs that operated 7-7 on the clock, and clocking up 15M impressions these pcb are stone reliable….. I don’t think I’ve ever replaced many of these pcb….. They are the leading edge in pcb design, much better than the the stuff that comes out of EU or the USA or Mexico, super reliable. The stuff that comes out of EU and are open source components that are thousands of dollars fail faster than these pcb that are Japanese designed and possibly made in China or Taiwan.
  9. Just to give some perspective on what’s currently used. this is what I’m working on, to give you some scale with a PH2 driver. Note also the the LSI chips used do not have exposed leads. If enlarged you’ll see components a fraction of the size of some of those normal size SMD. If something failed here its a full replacement pcb, cheaper and quicker than employing and equipping someone to repair this pcb, who MAY fix it.
  10. I doubt you will be able to work on the current SMDs, they are a fraction of the sizes you see here on this site when the covers are open…. I’ve actually posted some pics of current circuit pcb. Most OEM won’t even provide you with component values and you won’t get these SMD on current sites like RS component E14 etc…. It’s basically if it fails destined for landfill.
  11. I remember when I did COT Electronics, we did the basic theory on SS especially setting up BJT and FETs. We did the calculations on optimising the operation level of these devices. We did DC and AC and how the calculations were different all using OHMs law…. However passive devices I learnt and discovered via a magazine called Australia Electronics Monthly by a guy called David Tillbrook in his article for the 6000 mosfet amplifier…. This is where I learnt where to deploy different types of capacitors, it wasn’t taught in TAFE that should have been. The reality is even with the knowledge via TAFE/Diploma Electronics, as soon as you get into the service field, you are not given the luxury to fault find to component level, in fact with SMD and the sizes, do not permit you to down to component level, you’re not provided with the tools or the programming requirements down to machine language. All you’re given is a point to point diagram and if you’re lucky service modes where you can test individual components in input/output, at that specific point you are not measuring the voltage replaced the pcb! Or at that point if it’s activated in service mode and the component is not responding replaced that component…. All this in a SLA of 2hrs, with a KRA of 4 service calls a day minimum…..this is what the clients demand, this is how competitive the market is… it’s the market that dictates the way you work! I’m sure even with Telstra technician these days do not go down to component level on PCBs, it’s quicker and cheaper to swap a card out! Then again I’ve seen pcb repairs, check the DIY audio sites and some of the butcher jobs that get done as a upgrade. There’s a picture of someone’s handy work trying to replace a crystal for a clock circuit, seriously it was best left alone….. The traces are destroyed and it’ll never be the same!
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