As an aside, for people who can't stand SS in anything they build or use, why not go down this path: The Zero-Transistor IC, a New Plateau in IC Design - Application Note - Maxim ,😀 ? A nicely humorous overview of some important concepts ...
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Ah Scott...
Had I chose to approach the various stimuli in an analytical way, demanded to know what they are in advance and judge by my own ethics, knowns and beliefs, I would never had the chance to be affected by some of the finest enjoyments (what do you think a music composition, a poem, a painting ect is, if not a pink gonads and secretions mixture coming out from a poor soul’s tortured mind?)
George
Looks like misunderstanding, there is nothing personal.
Few pieces made were sold to customers few years ago. There is nothing to send. As you know, I do not make audio for living, and recently I neither sell designs, nor products. I have no reason to send anything to any reviewer.
I agree with most of your design rules. We differ in several important points:
- I do not use bare wires inside the box. To me, bare wires worsen capacitive crosstalk and they are sensitive to EMI coupling. I use small coax cables with PTFE dielectric and silvered conductors.
- to me, EMI protection/integrity is a key factor. I would not leave insulated connectors to allow EMI input along cables inside the box. Shielding looses sense then. Connector body must be at least coupled to box via capacitor. That's my experience and my rule. I always tune the setup for minimum output RF noise.
I do not need reviewers to prove by ears that the hereabove rules are correct.
thanks for the link, I like the smaller sot23 package of the maxim. Vishay make some excellent matched networks as well, if you have the coin, the vishay precision group make some$$ but the standard soic8 package thin film parts (available in several formats including ladder and isolated) are very good.
have you tried the baby octopus in South Korea, the ones that try to climb out of your mouth while you are eating them...
yeah I know, i've seen that article before. not so much the corners but the speed meaning it, wouldnt matter so much if it was a right angle or not. I didnt think about the wider trace at the corner though, thus lower impedance. its true though that at high speeds there can be some eddie currents at the corners though isnt it? the electron flow is still very slow regardless so maybe not. its tempting to think of fast signals meaning faster flow, but its really just faster change in charge of the same slow flow yes? I dunno, particle physics isnt really my area 😉
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Although this corner geometry issue is real, I suspect its academic even for high speed digital, especially when compared to other practical issues such as the stubs left when terminating at IC's, vias impedance, matching of impedance between alternate layers etc...
Thanks
-Antonio
Thanks
-Antonio
funnily its the exact part and value I bought to try out. Vishay ORN 1kΩ isolated thin film. as I understand it the global value match is 0.1%, but they are trimmed to each other for TCR to a higher level. there is a soic16 8 resistor part as well
the VPG Zfoil part is SMNZ, but not much stock at DK, that one is a 10k/10k 10k/10k part. you can get them in quad isolated of the same value, or in pairs, for example 500Ω/1kΩ 500Ω/1kΩ. they dont stock those values or a 1kΩ at DK, but you can order from texas components. TC outsource from VPG for this part, rather than making them and no naked options 😉 but you can order just 1 of whatever values you like, unlike from Vishay. they do a leadless package as well I believe, cant remember the part # offhand
the VPG Zfoil part is SMNZ, but not much stock at DK, that one is a 10k/10k 10k/10k part. you can get them in quad isolated of the same value, or in pairs, for example 500Ω/1kΩ 500Ω/1kΩ. they dont stock those values or a 1kΩ at DK, but you can order from texas components. TC outsource from VPG for this part, rather than making them and no naked options 😉 but you can order just 1 of whatever values you like, unlike from Vishay. they do a leadless package as well I believe, cant remember the part # offhand
PMA, can't we look inside your 'passive preamp'? Is it filled up for some reason? I would not want to imply that you did something less optimal than possible, but I can't say, one way or another. Your 'active preamp' appears to be full of quality parts, some very difficult to obtain, these days. Sort of like what Charles Hansen, Nelson Pass and I do so often.
NOMCA14031001AT is what I'd like. Heh, group buy? 25 is a nice price break, I'd take 1/3 of that many by myself.
Still waiting to hear from you why it takes a four deck switch for something as simple as polarity. Did you miss it the first few times it was asked?
se
Obvious...
Dan.
Four poles is provision for balanced system polarity switching I expect.
Dan.
That's poles. I was asking about decks. You can have four poles on a single deck.
se
But we know that in audio, some things that alter the sound defy common instrumentation, and thus the common way of looking at things.
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