Hello NorthStar
Organ pipes are specified in feet, even in metric countries.
A pipe that produces a 16Hz tone, is 32 feet long.
In reality any length organ pipe is a little longer than its nominal length, to allow for tuning.
The pull knob or tab for a particular stop is marked in feet which refers to the longest pipe in that rank of pipes.
The fundamental frequency of a 64 foot pipe is 8Hz of which only the harmonics can be heard by humans.
Sincerely,
Ralf
Organ pipes are specified in feet, even in metric countries.
A pipe that produces a 16Hz tone, is 32 feet long.
In reality any length organ pipe is a little longer than its nominal length, to allow for tuning.
The pull knob or tab for a particular stop is marked in feet which refers to the longest pipe in that rank of pipes.
The fundamental frequency of a 64 foot pipe is 8Hz of which only the harmonics can be heard by humans.
Sincerely,
Ralf
I already did not tube in the front en but tube in the endstage. Most think OPT is wrong I do not think so the OPT as transformers in audio are the blessing, and capacitors the curse.
Mine PSE has no overall feed back and has low distorsion level on that of a good loudspeaker. Due its solidstate drive stage it is noise free also on maximum volume you have to put your ear near to the tweeter to hear noise and there is no hum.
On listening position it is absolute noise free.
The reason to do so was the digital audio is solid state, and the problem are the power transistors in the poweramplifier, end tubes are very fast they are not old and slow as some may think.
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You don't say... :O
FWIW, I think vinyl did sound better than CD. The limitations of vinyl forced engineers to master their music sympathetically. A CD can reproduce any sequence of numbers you like, for better or for worse. The multiband processed mush that passes for popular music nowadays ( 🙂 ) is mastered so hot that it would probably burn out the cutting head and rip your stylus clean off.
A case in point, some modern CDs are mastered so hot that they run into digital clipping all the time. There is no equivalent of this in the vinyl world.
The annoying thing is that digital audio is capable of sounding better than vinyl, but market forces push in the opposite direction.
FWIW, I think vinyl did sound better than CD. The limitations of vinyl forced engineers to master their music sympathetically. A CD can reproduce any sequence of numbers you like, for better or for worse. The multiband processed mush that passes for popular music nowadays ( 🙂 ) is mastered so hot that it would probably burn out the cutting head and rip your stylus clean off.
A case in point, some modern CDs are mastered so hot that they run into digital clipping all the time. There is no equivalent of this in the vinyl world.
The annoying thing is that digital audio is capable of sounding better than vinyl, but market forces push in the opposite direction.
Amplfiers , pre , take your pick .....
Hello , no global feedback , but you are still running feedback ..
Yes in the pre-stage and I run a KT66 as a triode then you get in fact cathode feedback and I also use a cathode resistor that gives some local feedback.
Local isn't overal. You can not get the same result SS this way because a triode tube is very nice amplifier.
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I read that guy´s text 24/192 Music Downloads are Very Silly Indeed about higher sampling and bit rates. It was interesting and I think I must revalue some of my own experiences.
He mentions that "Neither audio transducers nor power amplifiers are free of distortion, and distortion tends to increase rapidly at the lowest and highest frequencies. If the same transducer reproduces ultrasonics along with audible content, any nonlinearity will shift some of the ultrasonic content down into the audible range as an uncontrolled spray of intermodulation distortion products covering the entire audible spectrum. Nonlinearity in a power amplifier will produce the same effect. The effect is very slight, but listening tests have confirmed that both effects can be audible."
Is that an argument for actually narrowing bandwith in builds with for example zobel filters on audio signal transformers etc, and that its not always good that the components can reproduce "out of hearingrange" tones?
Yes, I like to put an ultrasonic filter in BJT power amps to roll off the response above roughly 50kHz. I choose the filter so you can bang in a full amplitude square wave without the amp going into slew rate limiting on the edges. This ensures it will always clip before it runs out of slew rate.
Vacuum tubes might be very fast, but output transformers have some pretty serious bandwidth limits.
Vacuum tubes might be very fast, but output transformers have some pretty serious bandwidth limits.
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That was the essence of the last question I asked in this thread - it's becoming much more important to find good source material than worry about the format it's stored in.
Another reason Vinyl attracts me - it's like having a charcoal BBQ instead of gas. There's a ceremony about it, it takes time to set up and it looks more fun and interesting.
A transformer is a nice bandpass filter doesn't have to effect sound negative it helps cut of ultrasonic passive. Roughly I would say 3X fmax so f3 at 60khz.
Because I do not want to see phase shift in the audible area.
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Yes, that's a good argument for using input transformers. By the time the signal hits the output transformer of a tube amp, it might already have caused intermodulation in the tube stages.
Yes, thats what i meant , you had to be running some kind of local feedback, degeneration is feedback ...
SS amps for eg, usually sound their best at 33% of rated output , after this distortion rises rapidly with output .
Surely you are not saying transformer output is better than direct drive
Who the hell are you??? You are the troll dude!!!
Please keep it low key, no insults will be accepted here!!!
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