Yes, just not the way he does it. (Though to be fair, I haven't seen the bottom of this one, I'm just extrapolating)
The CCS will not improve anything because the second valve V2 takes the signal from the output with a divider and invert it , and not from the cathode of the V1 .
Looks like a good way to spread the output tubes out further on a limited size chasses (for cooling). I think the small tube layout would be fine. But where is the OT located at? Underneath? Must be small. Steve does seem to have some interesting layouts. The one with the input tube isolated on a chassis corner behind an xfmr looks worrisome possibly.
Good point- thermal management is crucial which is why I generally mount output tubes on perf metal.
You guys kill me!!!! I have to laugh!!! Trying to figure out the circuit. I really do have the lot of you chasing your tails now!!!! Ha-ha-ha!!!!!
Now you love my designs too!!!! Great!! So do all my clients!!!
Remember, I watching you.... And enjoying every moment!
Steve
E E AMPS
Oh I'm having a blast.
Leadbelly, it takes a real man to say what you did, thanks.
I must admit you were the last fella I thought would chime on our behalf.
I kinda wish I was playing detective too! Wheres that magnifying glass and talcum powder?
Leadbelly, it takes a real man to say what you did, thanks.
I must admit you were the last fella I thought would chime on our behalf.
I kinda wish I was playing detective too! Wheres that magnifying glass and talcum powder?
You'll notice there's no OPTs visible. So they must be underneath. This amp is claimed to make 40 watts. 40 watt OPTs are pretty big. I suspect the ones used are undersized for a true 40 watt amp with any headroom at all. It's designer's choice as to how long you want your signal wires and how crammed you want things. Not my choice of compromises.
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trying to figure it out? Well, yeah, its an interesting intellectual (and, as it turns out visual) challenge - a bit like sudoku crossed with a maze. Since you have been unwilling to explain the basis of your claims for exceptional circuit performance, others have taken the opportunity to try and figure it out.
Its called natural curiosity and is a valid learning approach. You may wish to try it some time.
Chasing tails? Don't think so. By and large, the team here know what a tail is and how it works, what connections it has to the body and how that connection is best made.
Love your designs? well, aesthetics is what got this thread started. Some love them, some like, some are so-so about them etc. One swallow doesn't make a summer. Glad your customers like them though - that must be very satisfying for you and them.
As for your watching. Well, I work on the assumption that anything I put on the internet is available to anyone. Your voyuerism is nothing more or less than what I would expect, but you will not be subject de jour for long, so I'm not sweating it.
I doubt anyone else is either.
Good to know you are enjoying it though. For a period there you seemed to be annoyed. I will sleep better knowing that this was a misread on my behalf.
Respec'
Its called natural curiosity and is a valid learning approach. You may wish to try it some time.
Chasing tails? Don't think so. By and large, the team here know what a tail is and how it works, what connections it has to the body and how that connection is best made.
Love your designs? well, aesthetics is what got this thread started. Some love them, some like, some are so-so about them etc. One swallow doesn't make a summer. Glad your customers like them though - that must be very satisfying for you and them.
As for your watching. Well, I work on the assumption that anything I put on the internet is available to anyone. Your voyuerism is nothing more or less than what I would expect, but you will not be subject de jour for long, so I'm not sweating it.
I doubt anyone else is either.
Good to know you are enjoying it though. For a period there you seemed to be annoyed. I will sleep better knowing that this was a misread on my behalf.
Respec'
"The CCS will not improve anything because the second valve V2 takes the signal from the output with a divider and invert it , and not from the cathode of the V1 . " --- Dimitris AR
I guess the grid has more control. I was thinking that the CCS tail might unload the cathodes better to have some effect. MJ mentions the same about V2 dominating and even causing some positive feedback to V1 side with an R tail.
How about making the floating parafeed P.I. circuit fully symmetric? We put triple R divider networks on both tube grids, in essence like making a digital flip-flop or oscillator. (each grid gets an R from each plate and ground, tuned so that the grid sees just shy of the signal needed to produce that output.) So the closed loop gain is reduced to just below unity. (so keeping to linear mode, no oscillator) This would make both sides symmetrical as far as output Zo or cathode Z. Then the input signal just has to tickle the grid on one side to control everything. With matched sides, a CCS tail might be of some use then.
I guess the grid has more control. I was thinking that the CCS tail might unload the cathodes better to have some effect. MJ mentions the same about V2 dominating and even causing some positive feedback to V1 side with an R tail.
How about making the floating parafeed P.I. circuit fully symmetric? We put triple R divider networks on both tube grids, in essence like making a digital flip-flop or oscillator. (each grid gets an R from each plate and ground, tuned so that the grid sees just shy of the signal needed to produce that output.) So the closed loop gain is reduced to just below unity. (so keeping to linear mode, no oscillator) This would make both sides symmetrical as far as output Zo or cathode Z. Then the input signal just has to tickle the grid on one side to control everything. With matched sides, a CCS tail might be of some use then.
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And to think all you would of had to do is ask Lance, you could have been sittin there listening for yourself.
Puzzles are more fun anyways.
Puzzles are more fun anyways.
It's unclear that the transformer on top is the power transformer. It *could* be the OPT, with power underneath. Probably not, but still possible. Dear lord, I hope it HAS a power transformer!
@ Steve White, the more you respond, the higher this thread goes in your search rankings. Well done!
And the funny part is, if they can actually figure out the schematic, which they won't, then what? You have to tune it too! That part is not there, it in me head.
Steve
E E AMPS
Huh, heh we know how to tune it. We have the technology. Just spray plenty of Krylon on the offending parts.
You guys kill me!!!! I have to laugh!!! Trying to figure out the circuit. I really do have the lot of you chasing your tails now!!!! Ha-ha-ha!!!!!
Now you love my designs too!!!! Great!! So do all my clients!!!
Remember, I watching you.... And enjoying every moment!
Steve
E E AMPS I think you don't use nothing new or unknown , the secret for low THD in my opinion ( not only in paraphase PI but in every amplifiyng circuit ) , is in the values of the used resistors , I know this method long time ago and I succeeded to reduce the THD even more in my new Circlotron OTL tube amp , the result is more cleaner sound with much lower "coloration" this confirmed by all my friends who listened to the amp .
Now you love my designs too!!!! Great!! So do all my clients!!!
Remember, I watching you.... And enjoying every moment!
Steve
E E AMPS I think you don't use nothing new or unknown , the secret for low THD in my opinion ( not only in paraphase PI but in every amplifiyng circuit ) , is in the values of the used resistors , I know this method long time ago and I succeeded to reduce the THD even more in my new Circlotron OTL tube amp , the result is more cleaner sound with much lower "coloration" this confirmed by all my friends who listened to the amp .
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Smoking Amp. -Can you post a scheme of your idea ( without resistor values ) only to refer to .
Yup, that's it! You're right! And to think I thought I could fool the lot of you!! Too smart for Moi!
And, if you think for a minute I'm worried about my google search, you're wrong! Any one reading this can see just how silly and pathetic this whole thread really is. Me worry about you all? AS IF!
But you may be worried about this Electrical Safety Authority Product Approval Requirements
Looks like you are breaking the law selling those things. $50,000 and up to a year in prison 🙁
Looks like you are breaking the law selling those things. $50,000 and up to a year in prison 🙁
"Smoking Amp. -Can you post a scheme of your idea ( without resistor values ) only to refer to . "
Unfortunately, I'm running on a borrowed PC lately, so my scanner is not available. But not too hard to visualize this.
Think first of a typical differential or LTP stage. Assume that the outputs will be in inversion with respect to each other, and with some gain with respect to the grid signals, due to the tube Mu's. Now we want to derive a grid signal(s) that will support the output(s) assumed.
We need to attenuate down for the grid signal(s), so a resistor to ground from each grid. Then we need to derive the AC grid drive(s), so we put high value, but slightly different resistors from the grid to each plate. The opposite plate gets the slightly lower resistance R, since we need a non- inverted drive signal. (positive feedback at just below unity gain)
Then the same network gets flipped around for the other grid input drive. (so each output plate has two dissimilar resistors, one going to each grid) The networks need to develop just slightly below (AC amplitude) the required grid drive levels to avoid becoming an oscillator.
Then the real input signal is just input thru a resistor to one of the grids. Any deviation of the input signal from the status quo feedback causes the thing to tilt (outputs shift) until it agrees with the input signal again. I think that may even increase the input Z since it always seeks to agree level-wise with the input. You could think of it as the ultimate See-Saw with no friction. Any force on it causes it to shift until it aligns with the force. Maybe could call it Ultimate See-Saw.
Unfortunately, I'm running on a borrowed PC lately, so my scanner is not available. But not too hard to visualize this.
Think first of a typical differential or LTP stage. Assume that the outputs will be in inversion with respect to each other, and with some gain with respect to the grid signals, due to the tube Mu's. Now we want to derive a grid signal(s) that will support the output(s) assumed.
We need to attenuate down for the grid signal(s), so a resistor to ground from each grid. Then we need to derive the AC grid drive(s), so we put high value, but slightly different resistors from the grid to each plate. The opposite plate gets the slightly lower resistance R, since we need a non- inverted drive signal. (positive feedback at just below unity gain)
Then the same network gets flipped around for the other grid input drive. (so each output plate has two dissimilar resistors, one going to each grid) The networks need to develop just slightly below (AC amplitude) the required grid drive levels to avoid becoming an oscillator.
Then the real input signal is just input thru a resistor to one of the grids. Any deviation of the input signal from the status quo feedback causes the thing to tilt (outputs shift) until it agrees with the input signal again. I think that may even increase the input Z since it always seeks to agree level-wise with the input. You could think of it as the ultimate See-Saw with no friction. Any force on it causes it to shift until it aligns with the force. Maybe could call it Ultimate See-Saw.
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I think this will not going to work , you will hardload the two output of the triodes and you will not succeed to improve the total result , maby this can cause oscilation too , at least this is my opinion .
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