Thanks! I know understand more fully how many of the filters I've used over the years actually work. I'm beginning to think that LSpice or equivalent should be used as the fundamental pre-laboratory tool when teaching this in schools and universities. At the upper levels teaching the incorporation of the parasitics, manufacturing variance effects (Markov) as well as environmental comes into play especially when you get into RF. At very high RF everything is a parasitic capacitor or inductor to an extent and thus creates unexpected filters when it's not deliberate design.
I fully agree that some sort of circuit simulation tool should be used in the teaching environment. Unfortunately, in my experience at least, schools and universities end up using tools that are sponsored by some company, so they cannot really be used "for fun", only in the work environment, since these are tools that are quite costly...
@@FesZElectronics LTSpice is under the auspices of Analog Devices while QSpice is out of Qorvo. |Open source software stability, evolution, and maintenance need a funding source as well as an enthused cross-trained core team at a minimum. along with clear public use case documents Over Over-dependence on a single or small set of core development leaders is a problem that can lead to the support and development going cold and eventually disappearing. You have an extensive background using LTSpice but some have indicated that the support team has moved on and updates and improvements will likely peter out. Given that what xSpise versions are you holding out hope for in the near and far future.
Awesome tutorial !! I have looked at the Baxandall tone controls with great interest but I have never had a definitive answer to the question of whether the pots used should be log or linear, to me I think It's obvious that they are linear and that log is for volume although if you used log pots it would still work ? how close am I please ? once again thanks.............cheers.
Great video, as always! 😉 Question: What's your time overhead for making such videos? The video is just under 16 minutes, what would you say was the time from idea to publishing for this video?
@@FesZElectronics Haha, okay, that seems to line up with my own experience on making videos 😅 I think this enormous time overhead is something the viewers hardly realize. But I won't complain, if it bothered me, I would start a Vlog 🤣
Quality takes time; if you want the outcome to be good, you need to put the effort into it. To some extent, I find the long time a good thing since I have time to think and re-think how to properly present and explain the subject. On the other hand it does also mean multiple projects need to run in parallel. Keep up the good work with your channel!
With Baxandal filter, it is a problem to get those logarithmic pots. I once considered taking stereo volume pot and flipping its resistive plates, but ended up just tuning it in reverse.
I have simulations and stuff that tells me you don't need log pots for the Baxandall tone controls so I'm confused, guess I will ask the expert above. To me the pots are changing the ratio of resistance to capacitance to adjust the corner frequency, this has nothing to do with our ears log response to volume :)
Hi FesZ, some notes: 1:39 The curve for the capacitor should have a 1/f shape. Instead, it is shown as linear. 13:50 I believe, ESR should always increase with rising frequency (skin / proximity effect). Why is it increasing for those low frequencies?
The impedance of the ideal capacitor does vary linearly on a logarithmic scale; I guess I should have also pointed out the type of scale; The ESR is also impacted by the dielectric and materials used around the capacitor which can have leakage.
Thank you. Yours is the best electronics learning channel I've found on TH-cam, clear and complete.
Thanks! I know understand more fully how many of the filters I've used over the years actually work. I'm beginning to think that LSpice or equivalent should be used as the fundamental pre-laboratory tool when teaching this in schools and universities. At the upper levels teaching the incorporation of the parasitics, manufacturing variance effects (Markov) as well as environmental comes into play especially when you get into RF. At very high RF everything is a parasitic capacitor or inductor to an extent and thus creates unexpected filters when it's not deliberate design.
I fully agree that some sort of circuit simulation tool should be used in the teaching environment. Unfortunately, in my experience at least, schools and universities end up using tools that are sponsored by some company, so they cannot really be used "for fun", only in the work environment, since these are tools that are quite costly...
@@FesZElectronics LTSpice is under the auspices of Analog Devices while QSpice is out of Qorvo. |Open source software stability, evolution, and maintenance need a funding source as well as an enthused cross-trained core team at a minimum. along with clear public use case documents Over Over-dependence on a single or small set of core development leaders is a problem that can lead to the support and development going cold and eventually disappearing.
You have an extensive background using LTSpice but some have indicated that the support team has moved on and updates and improvements will likely peter out. Given that what xSpise versions are you holding out hope for in the near and far future.
Excellent as usual, thank you!
another excellent discussion, thx
Hello, and welcome back :)
Macho!! Este tio rumano, tiene uno de los mejores canales de la temática. Un fiera ❤
@@albertpalau35 Si, lo se. Es un crack, todo lo que hace tiene una calidad espectacular.
Thank you for this video.
Will you be doing any videos on active filters? Both transistor and opamp versions?
Indeed, active filters are planned next. However, I mostly focus on the op-amp version
Really nice video!
Awesome tutorial !! I have looked at the Baxandall tone controls with great interest but I have never had a definitive answer to the question of whether the pots used should be log or linear, to me I think It's obvious that they are linear and that log is for volume although if you used log pots it would still work ? how close am I please ? once again thanks.............cheers.
Thanks, FesZ 👍
I've been waiting for this episode!!!
Very informative content.
Great video, as always! 😉 Question: What's your time overhead for making such videos? The video is just under 16 minutes, what would you say was the time from idea to publishing for this video?
Well I started planning this series on filters last year :D
@@FesZElectronics Haha, okay, that seems to line up with my own experience on making videos 😅 I think this enormous time overhead is something the viewers hardly realize. But I won't complain, if it bothered me, I would start a Vlog 🤣
Quality takes time; if you want the outcome to be good, you need to put the effort into it. To some extent, I find the long time a good thing since I have time to think and re-think how to properly present and explain the subject. On the other hand it does also mean multiple projects need to run in parallel. Keep up the good work with your channel!
Very informative!
With Baxandal filter, it is a problem to get those logarithmic pots. I once considered taking stereo volume pot and flipping its resistive plates, but ended up just tuning it in reverse.
I have simulations and stuff that tells me you don't need log pots for the Baxandall tone controls so I'm confused, guess I will ask the expert above. To me the pots are changing the ratio of resistance to capacitance to adjust the corner frequency, this has nothing to do with our ears log response to volume :)
Hi FesZ, some notes:
1:39 The curve for the capacitor should have a 1/f shape. Instead, it is shown as linear.
13:50 I believe, ESR should always increase with rising frequency (skin / proximity effect). Why is it increasing for those low frequencies?
The impedance of the ideal capacitor does vary linearly on a logarithmic scale; I guess I should have also pointed out the type of scale; The ESR is also impacted by the dielectric and materials used around the capacitor which can have leakage.
Cool!
Great presentation.
It would have been better, if you put together a written note so we kept as a reference.
Snubber?
😂