You typed "studying" wrong.
(1) I cannot afford to purchase simulation software. I would very much like to, but as a retiree on a fixed income, it's just not within my reach.
(2) You are asking too much. If the diagrams in post #1 are not enough, I'm sorry. But you can compare the old diagrams with the new ones for yourself, at your leisure, in the Attachments file at the bottom of post #1.
You may or may not be a certified radio & repairman.
That does not guarantee being an expert in analog audio circuits.
As you did prove here.
Please keep in mind that the "human errors" you post are for me typical beginner errors that I find in less than a minute in your diagrams.
And again
This is no insult
but the fact that your postings are read and criticised by people who are more knowledgable than your are.
That does not guarantee being an expert in analog audio circuits.
As you did prove here.
Please keep in mind that the "human errors" you post are for me typical beginner errors that I find in less than a minute in your diagrams.
And again
This is no insult
but the fact that your postings are read and criticised by people who are more knowledgable than your are.
Some simulators are free nowadays, LTSpice being the most common example. I try to avoid using simulators as much as I can during my spare time, as I spend more time than I like behind simulators at work already. Mind you, it is very easy to get nonsense out of simulators.
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Unlikely.
You know your own qualifications, so that comes readily to mind.
What you don't know about other people is to you as though it doesn't exist. Professor and Nobel Laureate Daniel Kahneman coined a term for the cognitive bias illustrated in the above quote. It is the acronym, WYSIATI
This whole reply is an insult to me, in my mind. First, you question my honesty. Then you question my knowledge of analog audio circuits, stating that I have proven it here by posting beginner errors. Oversights can be beginner errors, but not always. People make human errors all the time. And I'm getting old enough now that my mind is not what it once was. Yet, I can only assume that you could care less. Anyway, you spelled "criticized", "knowledgeable" and "you" wrong. But don't be insulted. I'm just trying to help you with your typing skills, since this proves that you are like a beginner at typing.
When someone tries to 'amplify' his/her 'defense' with a fallacy like this, I know more than enough.
Good luck from now on.
You got me wrong
1. I do not doubt your qualification but want to empasize that this does not matter for me.
Too often I read similar from people presenting their qualifications like a banner " I am knowledgalble, how could you dare think otherwise"
I know some repair guys as I do participate in a local repair cafe - and these are nice guys,
but most of them do not have deep insight of analogue electronice.
How could they? Neither does their job require this nor does their the education.
2. I do not question your knowledge - there is no question after reading your postings.
1. I do not doubt your qualification but want to empasize that this does not matter for me.
Too often I read similar from people presenting their qualifications like a banner " I am knowledgalble, how could you dare think otherwise"
I know some repair guys as I do participate in a local repair cafe - and these are nice guys,
but most of them do not have deep insight of analogue electronice.
How could they? Neither does their job require this nor does their the education.
2. I do not question your knowledge - there is no question after reading your postings.
Thanks for the tip. I looked into simulators before, including LTspice, but they were too expensive. New versions I guess. I did not know that older versions were available for free. Had used a simulator in college designing computer circuits, but that was a long time ago. However, I just downloaded LTspice IV. I will not be posting anything else on this forum for a while. Not until I learn how to use it. So far, I have found that I cannot transport any of my existing diagrams into it and will have to redraw everything from scratch using the app's tools. So, it's going to take some time to learn how to use it and then redraw my diagrams. See you later. And thanks again. You have been more tolerable and helpful than the others. And the next time I post to this forum, I hope to present valid circuits from the start, instead of having to ask for help to get them that way. Folks here just seem to get annoyed by that. Go figure.
Do they? There are several people in this thread (including me) who tried to help you debug the circuits, but for some reason that appears to annoy or even insult you. I hope you won't feel insulted by a mere computer program.
Yes, you will have to redraw the circuits from scratch. Time consuming but not too difficult imho.
btw, LTSpice always has been freeware. I still use the dinosaur Version 4
I would like to thank you all for helping me diagnose my diagrams in this thread (despite some being derogatory while doing so). To explain, when I said I have forgotten lots of stuff, that was not symbolic. I find that my memory is going bad as I age. It's not lack of understanding, since I understand things I have forgotten rather well when I am reminded of them. But that's the problem; not only not remembering things I once knew, but having short-term memory issues as well, which causes what appears to be a lack of understanding. So, I apologize for burdening you by seeking help when I should be making sure I post viable diagrams worked out beforehand. However, I just downloaded LTspice IV, as suggested. But I am a bit disappointed. It does not include all the functionality I would like, the most bothersome issue being no potentiometer symbols. I can use fixed voltage dividers until I decide on a potentiometer download, but among the many available online, most such downloads involve extremely complicated procedures.
Does anyone know where I can get an easily downloaded LTspice potentiometer?
By the way, see how some of you were offended when I pointed out your typos. If I am a "grammer Nazi", then many of you are "electronics Nazis". But everyone makes mistakes. It's part of being human. So, there's no need to be insulting when you're trying to help someone correct their mistakes. OK?
Anyway, I will not be posting any more diagrams -- or anything else -- until after I have learned to use LTspice IV.
Meanwhile, live long and prosper.
Does anyone know where I can get an easily downloaded LTspice potentiometer?
By the way, see how some of you were offended when I pointed out your typos. If I am a "grammer Nazi", then many of you are "electronics Nazis". But everyone makes mistakes. It's part of being human. So, there's no need to be insulting when you're trying to help someone correct their mistakes. OK?
Anyway, I will not be posting any more diagrams -- or anything else -- until after I have learned to use LTspice IV.
Meanwhile, live long and prosper.
Some people don't like LT Spice. For other alternatives, a list of free circuit simulators is at: https://en.wikipedia.org/wiki/List_of_free_electronics_circuit_simulators
Try https://www.diyaudio.com/community/...rom-beginner-to-advanced.260627/#post-4025305.
You can 'simulate' a potmeter by two resistors. To check the effect of rotating the pot, you can run sims with different resistor ratios keeping the total R the same. Check the .step command.
I't just one more step to using a number to specify the pot setting, but first things first.
Jan
You can 'simulate' a potmeter by two resistors. To check the effect of rotating the pot, you can run sims with different resistor ratios keeping the total R the same. Check the .step command.
I't just one more step to using a number to specify the pot setting, but first things first.
Jan
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The power of diyaudio. Just asked, and within minutes my friend member Hans Polak gave me a potmeter model for LTspice.
Thanks Hans!
Jan
Thanks Hans!
Jan