True, for various reasons.
Some are not interested because they think as you describe: Below some given threshold of hearing they believe it doesn't matter.
Others are not interested because they believe the correlation between hearing and AP measurements is too limited to spend too much time on. Listening and AP are for separate purposes, they are not expected to correlate perfectly.
Tourny,
You need to give some slack to those who are obviously ailing. As it seems many are here.
This is a place of social interaction for many who seem to have no other outlet. Yes they may behave badly but as their circumstances and isolation are unknown issues just putting up with them often does them benefit.
You need to give some slack to those who are obviously ailing. As it seems many are here.
This is a place of social interaction for many who seem to have no other outlet. Yes they may behave badly but as their circumstances and isolation are unknown issues just putting up with them often does them benefit.
I hope so. This is the normal evolution: VLSIs. As integrated circuit replaced the discrete components, VLSIs replace nowadays printed boards everywhere it is possible. Miniaturisation, integration. And, with digital, it is not a technical problem. Does-it not means that audio quality and performance are neglected ? On the contrary.
I had no idea we let Vadim out of the building to visit customers, but I'm glad you got to meet him! Most of his work in recent years has been on high precision choppers, but he was involved with the OPA1692 initially.
I really would have liked to bring Steve, the designer of the OPA1622 and OPA1656 (among others) to visit customers. He reported to the Tucson group remotely from Florida, often dragging a workstation out to his boat so he could keep designing op amps on it (true story). A true audio enthusiast, who loved Janis Joplin, and hung his turntable from the ceiling in an effort to eliminate vibration. He retired about a year ago though and spends most of his time traveling.
We've got an eclectic group here in Arizona. I still see the designer of the OPA2134 every day. He grew up in Poland in the communist system before escaping to the U.S., he snuck away on a school trip to Austria. He has hilarious stories about how he would smuggle blue jeans into Russia to sell, and would take that money and buy as many Russian hats as he could take back to Poland to sell, to buy more jeans...
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Personal insults removed.
Please keep the discourse as civil as possible, you know who you are!
When I worked in Prague in the very early 80s jeans and ladies tights (panty hose to those cross pondians here) were excellent currency!
I wish I could remember all the steps to his arbitrage scheme, I just know it started with jeans and ended with hats. But I know there were many other goods along the way. From the way he tells it, it seems like he spent a good portion of his youth riding trains and convincing customs officers not to check his luggage or the overhead compartments...
These Red Lines seem a bit random in their removal. A thousand insults come my way or others and nothing happens. Its a regular 'feature' here. Some can give it out but cant take it themselves. Cry baby.
Anyway, three terminal IC volt regs of the series pass type with emitter follower output do not regulate well when lightly loaded..... say about 0-10% load region. So, I pre-load the output (say 1K) which moves the operation into a more linear region and as a side benefit, seems to improve the response time/BW.
There must be many others with a favorite circuit trick or two. What is yours' ?
THx-RNMarsh
Anyway, three terminal IC volt regs of the series pass type with emitter follower output do not regulate well when lightly loaded..... say about 0-10% load region. So, I pre-load the output (say 1K) which moves the operation into a more linear region and as a side benefit, seems to improve the response time/BW.
There must be many others with a favorite circuit trick or two. What is yours' ?
THx-RNMarsh
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RNM,
My favorite circuit trick is not to stick my tongue in an AC wall outlet! This has served me well all my life!!! 😉
Sorry just gotta use the straight line.
ES
My favorite circuit trick is not to stick my tongue in an AC wall outlet! This has served me well all my life!!! 😉
Sorry just gotta use the straight line.
ES
Using a special homebuilt jig to observe the worst-case value of AC mains inrush current. The jig carefully controls the phase angle at which the equipment is switched on. Set it for the worst case phase, get the worst case inrush. I think I posted a photo of it in the predecessor "part II" thread.
"I had no idea we let Vadim out of the building to visit customers . . . "
Often a good sales guy will know more about what is going on in an account than the people that work at the account. 😀
Often a good sales guy will know more about what is going on in an account than the people that work at the account. 😀
Thats sounds useful. Is it hard to build? Got schematic?
Surely, we dont all just buy an IC and go by spec sheets only. P-n-P.
Come on all you designers show us some original and useful circuit tricks.
THx-RNMarsh
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Ha, I once knew a guy who decided to strip the plastic off the twin flex cable on one of those old 110V line public address systems with his teeth when someone decided at that moment to make an announcement 😀
I have excellent experience with the positive TPS7Axx and the negative TPS7A33.
Very low noise, very high bandwidth and very good Power supply ripple rejection.
Hans
Class A Buffering the Correct Way
A trick I learned from diyaudio member jcx who as I mentioned a few weeks ago has a bag full of neat tricks.
(I haven't seen jcx around for a while BTW)
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