Shaking the mercury around “picked up” all the sputtered metal and rewetted the anode, cathode, and grid. There was bad sputtering inside the glass, and it was triggering far too early. I once repaired an old magnetizer by shaking the thyratron tube (which had a portion of liquid mercury inside it).
We don’t pay $100,000 on expensive audio crap because money is no object, we DIY our own significantly cheaper equipment that makes anything consumer look trash, but when consumer is all everyone is buying, how can they have a true opinion on audio? So yes, EE’s have indeed already figured this all out already, decades ago in Japan. Yes, delusional, why don’t you build your own system then and figure it out like the majority of us people do that understand what exactly is going on here. You need about 60mhz bandwidth at least to reproduce complex audio waveforms or you end up with all kinds of ringing and delays in the rise/fall times which translates directly into distortion that ignorant people won’t even notice and always expected was there all along, yeah it makes that airy the soundstage disappear, the ones you guys constantly claim never exists! Anyone who says otherwise is looking at their P.eng too much and being ignorant of the facts. It is why audio devices perform significantly better and have an open airy soundstage the more bandwidth your preamp/output devices are capable of. Modulation of RF and data is very repetitive and predictable, mostly are simple waveforms like modulated FM radio, yet people still confuse the two. To reproduce all that constant variance accurately requires high bandwidth too just like your fancy RF devices. Audio is an extremely complex waveform, often having massive slew rates that go from -4 to +4V faster than a typical RF signal can ever go, just from a simple symbol/crash during a heavy bass note. I know I’m necroing this but you guys keep comparing very tiny voltage/high bandwidth signals to low frequency audible signals and the two aren’t even remotely the same. Posted in home entertainment hacks Tagged audio, hi-fi, stereo, stereo switch Post navigation If the ESP isn’t your bag, we’ve brought you another relay based audio switcher in the past that used an Atmel chip. The metal-can version of the switching transistors seems a little overkill, but fancy audio is a funny business. You might think that an audio switching board is a very simple device indeed and thus not worthy of Hackaday’s attention, but it’s surprisingly easy to make a mess of a module like this one and they have put in some effort to avoid the pitfalls.
The ground connections on audio and switching sides are isolated from each other to avoid transient noise finding its way to the speakers. That is the philosophy that lies behind ’s relay-based audio switching board, which boasts 5 high-quality relays each handling a stereo input, with their control passed either to a rotary switch or to an ESP32 module. Only physical switches will do because they come without the risk of extra noise or distortion that their silicon equivalents might bring. If you are a devotee of audiophile-quality analogue hi-fi, switching between sources simply can not be done through a solid-state device.
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