Regarding modeling, it can only get you so far. Better to read some good books on tube audio design. The Valve Wizard books are a pretty good and intuitive starting point. If you don't understand some of it then ask. You can't learn enough only from us answering a few forum posts. You need to do some reading.
BTW, did you ever figure out what a 'frequency pole' is? If not, maybe we can point you to some reading material. Its not a trivial topic for a relative beginner.
BTW, did you ever figure out what a 'frequency pole' is? If not, maybe we can point you to some reading material. Its not a trivial topic for a relative beginner.
Understood.
How will this help with designing the speaker cabinet and choosing drivers?
Appreciate the recommendation. Any of this pertinent? https://worldradiohistory.com/BOOKS...fier-Circuits-Pettit-McWhorter-1961-Adobe.pdf
I have and been seemingly ignored...
Agree, why have done hours and hours of reading while sick.
Nope. Look forward to information, I forgot to research the topic.
Time for us to be picked up by a friend to pick up a new prescription (which I will investigate if makes one drausy), be back to learn some more from the generous information.
"How will this help with designing the speaker cabinet and choosing drivers?"
You started out this thread asking about a tube amp schematic. Obviously that's where there are HV risk factors.
In that regard it is a separate topic from speaker design.
Whatever you want to design, amplifiers, speakers, preamps, DACs, etc., there is a learning curve for each one. It takes years. Years of fun if you look at it the right way. Okay?
You started out this thread asking about a tube amp schematic. Obviously that's where there are HV risk factors.
In that regard it is a separate topic from speaker design.
Whatever you want to design, amplifiers, speakers, preamps, DACs, etc., there is a learning curve for each one. It takes years. Years of fun if you look at it the right way. Okay?
Don't assume drowsy is the only risk. Medications can affect judgement, physical coordination, emotional disposition, and or things like, visual, olfactory, tactile, etc., perceptual changes, and or various other things. Many known effects have little or nothing to do with feeling drowsy/sleepy. Thus read patient information carefully with an open mind as to what may constitute risks. (If you really want to know, look at the list of drugs that airplane pilots are prohibited from taking: https://www.faa.gov/pilots/safety/pilotsafetybrochures/media/Meds_brochure.pdf )
Also, talk to your prescriber about possible side effects and risks. Explain that you may be working with HV, and ask if they have recommendations regarding working with potentially hazardous equipment. Just common sense stuff.
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Understood. I was 12 years old when bio "mother" (never acted as a mother, instead was abusive) had me install a ceiling fan. I turned it on, found the mount a little loose, so instead of being smart and turning off the circuit, got up on the ladder, and of course bumped the live wire. Went down my arm, through my heart, and down my legs, sending me flying. Thankfully my sister's bed happened to just be in the right spot, otherwise be a hard landing. Wasn't feeling very good the rest of the day. A lesson that will stick with me all my life.
What about PVC planks on a cement floor? I also have a rubber door mat, though my perception just best to get an anti fatigue mat, be good to have when working at the cutting table (I do my own tailoring and alterations).
Appreciate knowing this. 🙂 Now think of it, maybe applies to doing anything dangerous. For example,I think about how going to attack a cut or grind before turning on the tool, can easily slip and if you are in the path...
My Fluke is rated to 600 volts. The transformer is rated at 230 volts, where is the over 600 coming from? Just curious.
Okay.
I know all about this. University doctor didn't inform me of this, wouldn't write me a note, so got dinged (I barely could keep my head up, like walking in a fuzzy dream). I quit years and years ago, meditation works far batter.
The other two medications I take has the opposite effect. Asked the pharmacist about this new medication and said would not cause grogginess.
"where is the over 600 coming from?"
The power transformer may step up the voltage several hundred volts DC for tube anodes (plates). For some tubes not common for audio, the voltage can go up to tens of kilovolts or higher (just saying tubes can run at very high voltages in some cases, something to keep in mind). Even for audio, before the rectifier diodes or tube rectifier(s) the peak voltage can be higher than the average audio tube anode voltage.
The power transformer may step up the voltage several hundred volts DC for tube anodes (plates). For some tubes not common for audio, the voltage can go up to tens of kilovolts or higher (just saying tubes can run at very high voltages in some cases, something to keep in mind). Even for audio, before the rectifier diodes or tube rectifier(s) the peak voltage can be higher than the average audio tube anode voltage.
None of them are on the list, double checked one and has no side affects concerning these.
Despite being young, my testosterone is low, which causes fatigue, especially by the afternoon I am dragging (prostate cancer bloodwork on Monday). So I do work needing mental clarity in the morning. Now comes to me this should include working on high voltage.
Do need to send my new PCP instructions on how to get durable medical equipment, I will ask this question. Appreciate the concern and the things I need to do before getting started.
"...cause grogginess."
Again, getting the feeling you may not be getting the point. Doesn't have to be drowsy, groggy, etc. Nothing like that. If you took certain stimulants you might not feel either effect, but perhaps you might feel more bold and confident than is normal for you. That would be a risk factor too. Get it?
Again, getting the feeling you may not be getting the point. Doesn't have to be drowsy, groggy, etc. Nothing like that. If you took certain stimulants you might not feel either effect, but perhaps you might feel more bold and confident than is normal for you. That would be a risk factor too. Get it?
Interesting a 230 volt transformer put out more than 600 volts, would never crossed my mind and led to at least melted leads, if not injury. Yikes.
Bupropion, testosterone, and just today added losartan. New PCP went over all my medical history and despite no one being concerned for four or five years, he is concerned about my high blood pressure (genetic, I am a muscular 195 pounds, 32 1/2 inch waist, 6'-2").
The second anode in old CRT color TVs often ran at up around 25kVDC. The AC line input voltage might have been around 120VAC.
Transformers more or less maintain approximately the same input power as output power. So if the input voltage is 120VAC at around 1A, then that's 120W of power. If we step it up to 1.2kV, then the output current must be limited to not more than around 0.1A. That's since, power = volts times amps.
Transformers more or less maintain approximately the same input power as output power. So if the input voltage is 120VAC at around 1A, then that's 120W of power. If we step it up to 1.2kV, then the output current must be limited to not more than around 0.1A. That's since, power = volts times amps.
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Yes, though your response was to my statement regarding speaker modeling, thus the confusion.
Plan to keep it that way.
That is why I am disappointed folks with years of experience seem unwilling to help because I am severely deficient in social skills and offend folks, hard not hating being Autistic. Think how much more I could have known and done being a neurotypical. Oh well, got to focus on the few positives instead. I had the desire of building a system and being basically done, rather than spend years and years doing research to reach satisfactory designs to build.
Don't plan to work on any tube televisions, don't watch television (only get one or two channels out here and have more than enough to get done).
Regarding speakers, most like you will not run into HV in most cases. However, it may be good to know that some speakers and even some headphones run at rather high voltages. They use electrostatic motors rather than magnetic motors. Just advising you about this in case you ever run across HV speakers, that you need to treat them like you would HV tube circuits. Case in fact, my main speakers are electrostatic and run at a few kV.
I had a thought, what about eliminate the feedback interlay avoiding the oscillations @grovergardner warned about.
A basic search brings this up:
"In full agreement. Pentode amps present a real dilemma - no feedback is obviously better for dynamics and images but the bass suffers and the distortion is often obvious."
"I went from global feedback to none in UL PP amps. I preferred the natural, easy sound without feedback, but even in UL I couldn't get rid of a rather etched sound. When I went over to triode outputs the sharpness disappeared, leaving just a smooth, natural and very detailed sound. I'd never go back to pentodes or global feedback. To get the watts I just parallel up the smaller triodes - 12b4, 6S4A, 6CK4, 6AH4 and eventually 1626 when I get round to it (it'll need a few!) . You can use the double triodes too - 6BX7, that kind of thing. With a bit of lateral thinking you can use a whole stack of real triodes, and the sound - for me - is just on a higher level. I'm happy."
Since the woofer be driven by SS, I am not concerned about flabby bass. Worse case, do a low pass cut, right?
To be clear, not set on the Audio Note L1 clone, just a broad application curiosity that also apply to the Dyna. 😉
Thought(s)?
A basic search brings this up:
"In full agreement. Pentode amps present a real dilemma - no feedback is obviously better for dynamics and images but the bass suffers and the distortion is often obvious."
"I went from global feedback to none in UL PP amps. I preferred the natural, easy sound without feedback, but even in UL I couldn't get rid of a rather etched sound. When I went over to triode outputs the sharpness disappeared, leaving just a smooth, natural and very detailed sound. I'd never go back to pentodes or global feedback. To get the watts I just parallel up the smaller triodes - 12b4, 6S4A, 6CK4, 6AH4 and eventually 1626 when I get round to it (it'll need a few!) . You can use the double triodes too - 6BX7, that kind of thing. With a bit of lateral thinking you can use a whole stack of real triodes, and the sound - for me - is just on a higher level. I'm happy."
Since the woofer be driven by SS, I am not concerned about flabby bass. Worse case, do a low pass cut, right?
To be clear, not set on the Audio Note L1 clone, just a broad application curiosity that also apply to the Dyna. 😉
Thought(s)?
If you remove the gNFB there will be too much gain.
Some of which can be lost by triode connecting the tubes.
A 2 resistor divider on the input can also work.
Some of which can be lost by triode connecting the tubes.
A 2 resistor divider on the input can also work.
Adriel, you may appreciate this meta view of learning:
For electronics, we learn in a somewhat different direction. Rather than bore down from observations towards a deeper reality, we begin with a rudimentary but absolutely necessary knowledge of some fundamentals (Ohm's Law, resistance, capacitance, inductance, vacuum valve and semi-con operation, etc.) and work upwards towards modelling. Doesn't have to mean modelling in a computer simulation, and in fact it shouldn't until mental models are already in place. But! attempts to shortcut the learning curve by moving directly into detailed design decisions based on internet lore are fraught with peril.
The internet is full of Lore. Sometimes it's interesting, sometimes it's even correct, and sometimes it's valuable, but without the fundamentals it's impossible to tell which is who. I strongly recommend to folk wishing to actually learn, to ignore as much as possible internet Lore. Recommendations from trusted sources (diyAudio is probably as trustworthy as these things get, and even it isn't perfect) sometimes excepted. Still gotta flex and exercise to keep your BS detector front and center.
All good fortune,
Chris
For electronics, we learn in a somewhat different direction. Rather than bore down from observations towards a deeper reality, we begin with a rudimentary but absolutely necessary knowledge of some fundamentals (Ohm's Law, resistance, capacitance, inductance, vacuum valve and semi-con operation, etc.) and work upwards towards modelling. Doesn't have to mean modelling in a computer simulation, and in fact it shouldn't until mental models are already in place. But! attempts to shortcut the learning curve by moving directly into detailed design decisions based on internet lore are fraught with peril.
The internet is full of Lore. Sometimes it's interesting, sometimes it's even correct, and sometimes it's valuable, but without the fundamentals it's impossible to tell which is who. I strongly recommend to folk wishing to actually learn, to ignore as much as possible internet Lore. Recommendations from trusted sources (diyAudio is probably as trustworthy as these things get, and even it isn't perfect) sometimes excepted. Still gotta flex and exercise to keep your BS detector front and center.
All good fortune,
Chris