Very interesting! I appreciate you sharing, thank you. 😀
I happened onto information there is Windows XP Mode in Windows 7, which is what the desktop here is; the XP machine is in storage (and happens to be accessible, was considering getting rid of it). If can get that to happen, can download and be off to the races sooner.
I am also happy as see a plethora of resources for running Windows XP, apparently it is still well loved and used. Have to get her out of storage and see if still does the random blue screen of death (it was a custom build, never worked right, and refused to fix it or comply with the contract to upgrade to the next OS when it came out). Worse case, I am certain I saved my copy of XP. Also, being a bare all aluminium chassis, looks superior to the painted black machines now, wouldn't mind having it sitting out.
I can't get Tubecad's SE amp cad to work on my main windows 10 build, and my motherboard doesnt support virtualisation, unfortunately. However, Tubecad Push-pull amp cad does work natively in 10. I have a thinkstation with a Xeon processor I need to try it on there too.
Adriel, I sent you a private message if you want to take a look regarding some resources.
Adriel, I sent you a private message if you want to take a look regarding some resources.
I have not bought anything yet. Yes, I know a little slow, however, been busy with trying to get this place cleaned (still barely any energy) and get some medical stuff sorted.
A while back, when @kodabmx voiced a reasonable concern about oscillations and the need to know the brand and model of OPT, had the idea of using a potentiometer to adjust the value per the directions. Now wonder if, so long as didn't get into oscillations, this could be adjusted for different music. Probably one of my crazy and over complication ideas.
Actually, I am getting a definitive answer now, just there are two and differ. Ha.
So the 5,5kΩ OPT that differs from the schematic specification (8kΩ) and OPT supplied (IIRC 5kΩ) would suffice?
Okay, looking into it.
Oh, really? I appreciate the offer! 😀 Hmmm... 🤔
I am getting that feeling and most folks here are deep into it.
To be clear, I really do feel the desire to help from most of the folks here.
Which achieves different ratios of resistance.
I didn't find frequency poles in the information previously provided...
I am not planning on changing anything until know it works or R16 needs to be because an oscilloscope is showing the curves in the square wave (per previous instruction). There is a Tektronix DPO7254 up on Ebay with a starting bit of $6,50USD closing in six days, maybe that be an option. Honestly, I have no clue what these hertz ratings mean, was simply told to get an oscilloscope.
Only in not knowing the OPT. Now the question has changed to if the amplifier is now able to be built knowing the exact OPT used in the L1.
Thank you for the complement. 🙂
I have been concerned asking to many questions and that they are all complex.
I think more along the lines of grits, fried okra (not easy to do it right), and scrambled eggs (this be a supper, evening, meal). Maybe once have the skill to do this, then move onto Swedish meatballs (which for those that never made them take skill and a good bit of time, with lots of steps). 😛
I know, nor did I see it offensive. Rather, you two bringing up a concern which needed addressing. 🙂
Not exactly. Frequency response breakpoints occur where the magnitude of a reactance, such as a capacitive reactance, equals the magnitude of a resistance. For example, like in a simple RC low pass filter.
"An example with zero and pole..."
https://en.wikipedia.org/wiki/Bode_plot#An_example_with_zero_and_pole
Maybe search the text for the word 'pole'
There is also a section entitled "Straight-line amplitude plot," which may sometime be described as a 'breakpoint diagram.'
That's something not uncommon to see.
All the above having been said, do you know what the variable 'S' is? If not, you should ask because you will find it comes up a lot in the context we are discussing. Same for the Pi and or Sigma notation, or anything else that isn't clear.
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Regarding an oscilloscope, there is a learning curve for that. Its reasonable to start out with an entry level 100MHz or 200MHz, 2-channel scope. For example:
https://www.amazon.com/Siglent-Technologies-SDS1202X-Oscilloscope-Channels/dp/B06XZML6RD/ref=sr_1_4?crid=1Z2U5RW3UAVV1&keywords=oscilloscope+2+channel+200+mhz&qid=1676059572&sprefix=oscilloscope,+2+channel,+200,aps,158&sr=8-4
https://www.amazon.com/Rigol-DS1202Z-Channel-Digital-Oscilloscope/dp/B07XSH2NR2/ref=sr_1_3?crid=1Z2U5RW3UAVV1&keywords=oscilloscope+2+channel+200+mhz&qid=1676059572&sprefix=oscilloscope,+2+channel,+200,aps,158&sr=8-3&ufe=app_do:amzn1.fos.ac2169a1-b668-44b9-8bd0-5ec63b24bcb5
Before you buy one though, you need to understand you will have to learn about probes and how to use them, including how to ground probes, and also learn what all the knobs, buttons, and options do on the scope.
For some info:
https://www.amazon.com/Siglent-Technologies-SDS1202X-Oscilloscope-Channels/dp/B06XZML6RD/ref=sr_1_4?crid=1Z2U5RW3UAVV1&keywords=oscilloscope+2+channel+200+mhz&qid=1676059572&sprefix=oscilloscope,+2+channel,+200,aps,158&sr=8-4
https://www.amazon.com/Rigol-DS1202Z-Channel-Digital-Oscilloscope/dp/B07XSH2NR2/ref=sr_1_3?crid=1Z2U5RW3UAVV1&keywords=oscilloscope+2+channel+200+mhz&qid=1676059572&sprefix=oscilloscope,+2+channel,+200,aps,158&sr=8-3&ufe=app_do:amzn1.fos.ac2169a1-b668-44b9-8bd0-5ec63b24bcb5
Before you buy one though, you need to understand you will have to learn about probes and how to use them, including how to ground probes, and also learn what all the knobs, buttons, and options do on the scope.
For some info:
I don't know what hardware my Windows 7 has, the XP machine was not only built not only built for the graphics of Vista, also for 3D AutoCAD with one of the best graphics cards available, so maybe it will work.
Sent a letter back.
Bet there is. Like a horizontal lathe or a sewing machine.
Thank you for answering my question. 🙂
How about used?
https://www.ebay.com/itm/1954899554...WE+4Qo=|tkp:Bk9SR8af7unHYQ&LH_ItemCondition=4
https://www.ebay.com/itm/2954937611...2/sO6g=|tkp:Bk9SR8af7unHYQ&LH_ItemCondition=4
https://www.ebay.com/itm/1856771309...GWXhAyve26oJi5EMfjbH8/Vs8=|tkp:Bk9SR6iZl-vHYQ (Interesting it has been re-capped.)
Already looked into it last week. 😉
Thank you for the PDFS! 😀
See how mentally deficient I am as all this pole stuff is just surpassing my understanding. If this is a must to satisfy your need regarding R16 and therefore building the amplifier, then I am in a troubling position.
I don't know what S is, however, if must know it for fishing, then I request to be enlightened. If I remember my elementary mathematics, π is 22/7 or 3,16, though been a long time since have used it. Σ is for total, at least in mathematics.
Read carefully. Win7 will work. Even 64-bit! (Just verified here.)
But this will NOT answer your far-flung questions.
As the great Tom Lehrer taught us:
I am never forget the day I first meet the great Lobachevsky
In one word he told me secret of success in mathematics:
Plagiarize
Plagiarize!
Let no one else's work evade your eyes
Remember why the good Lord made your eyes
So don't shade your eyes
But plagiarize, plagiarize, plagiarize
Only be sure always to call it please "research"
Who was it who said "Good artists borrow, great artists steal"? Picasso, ahh, Pablito, gets mentioned, but as Dorothy Parker said about anything clever
"If, with the literate, I am
Impelled to try an epigram,
I never seek to take the credit;
We all assume that Oscar said it."
Poles and zeros are dead easy. A Bode plot is just a log-log plot of frequency on the x-axis and magnitude (amplitude, could be volts or current or sound pressure or whatever you're measuring) on the y-axis, paired with another plot with the same log frequency x-axis and a linear scale phase angle y-axis. On either of these, when the curve tilts downwards (but not necessarily down), left to right, that's called a pole. When the curve tilts upwards (but not necessarily up) that's a zero. Dead simple.
All good fortune,
Chris
"If, with the literate, I am
Impelled to try an epigram,
I never seek to take the credit;
We all assume that Oscar said it."
Poles and zeros are dead easy. A Bode plot is just a log-log plot of frequency on the x-axis and magnitude (amplitude, could be volts or current or sound pressure or whatever you're measuring) on the y-axis, paired with another plot with the same log frequency x-axis and a linear scale phase angle y-axis. On either of these, when the curve tilts downwards (but not necessarily down), left to right, that's called a pole. When the curve tilts upwards (but not necessarily up) that's a zero. Dead simple.
All good fortune,
Chris
@Chris Hornbeck A bone of contention on recent posts has been whether knowing that (bode plots etc) is a prerequisite for getting ones hands dirty with a real project. Much of the risk of a failed project is mitigated by standing on the shoulders of giants, and copying an existing design, or taking it to the next level and building on a PCB with known and evaluated OPTs.
What advice would you have for someone who wants to build a tube amplifier, around 10W per channel? What are your views on doing it point to point the first time? Are monoblocks so much better than a stereo amplifier?
What advice would you have for someone who wants to build a tube amplifier, around 10W per channel? What are your views on doing it point to point the first time? Are monoblocks so much better than a stereo amplifier?