Suggestion for next video THD graph with various harmonic content. Even at lower levels transformers will show considerable THD content at lower frequencies. Greatest audio related channel currently 🙌🙌🙌
Very nice Dave thanks when I need transformers I only use Jansen and use the correct one for the job just the other day I had to run audio signal down cat 5 60 meters and running past the breaker box so I put transformers at each end it worked better than i thought-35 db noise floor it works fine for now
👍👍 if ya use balanced lines down shielded cat5e, probably won't need the transformers as cat 5 is excellent at rejection with it's excellent twists. Especially, u/ftp or f/utp
@@DaveRat yes true that all happened cos the people doing the cable runs and run out of signal cable so the cat was being used as a draw cable nobody told me shit happens
Two 100 mfd caps in series reverse polarity create a 50 mfd bi polar cap if not mistaken . Have been happy with the sound of Muse bi polars in the 100v range . Found nice results with replacing polar with bi polar in the signal path in ic signal chain . Upping the voltage where space allows. A nice clear informative video . Regards
In this setup I have 1 cap on pin 3 and 1 on pin 2 Nothing is in series and series is not needed as they are non polar. And yes, if they were polarized, would need 2 in series for each of pin 3 and 2, and the caps would need to be 200 uf each to achieve this setup.
Very cool and interesting. I tried measuring different cap brands I have here but don't own gear accurate enough to find differences I could point to as clear and distinct My guess is that since audio tends to go through many many caps, the cap type quality is both irrelevant and possibly important. Irrelevant in that if audio goes through 30 caps, changing in to high quality is meaningless. But important possibly in that if each cap has a slight fegredatopn, changing all of them cod be advantageous That said, if audio is not going through any caps and adding one, I would say the higher quality would be a logical choice
@@DaveRat Once you are above a certain level and using bi polar caps the difference is small vs time and trouble . Doing what you can to not have 30 polar caps in your signal path is a very good goal . The problem with many people is they are not pragmatic in their view of a situation IMHO . 😁
I wonder what the difference would be loading down the transformers with pure resistors vs. the mic preamps since as you pointed out, preamps have caps in the circuit which will alter phase and frequency response. I might be cool to test with 1.2k-2kΩ resistors for mic level transformers and maybe 10kΩ resistors for line levels like to be close the impedance of the average line input. Then compare a couple of different mixer pre-amps and line inputs of comparable impedance. I realize DC resistance/resistors aren't a real world load, but it would give a non-reactive baseline to compare.
I will try and take a look. By theory, the impact of the loading impedance should impact the frequencies relative to that impedance. So, since an audio preamp cap passes audio freqs, it should be fairly transparent at audio freqs
The trick of adding a small cap in parallel to the big blocker works OK but using an active op amp with a big cap in its feedback loop to strip DC away is cleaner still. DC blocking caps are notorious for causing loud "pops" as they charge up on power-up or when connecting cables.
Are you putting the caps in parallel to raise their value to 200uF and connecting the bank in series with pin 2? Or is that one cap in series with pin 2, the other cap in series with pin 3 for filtration on the + and - of the 48vDC?
The phase shift itself tends not to be audible unless combined with the same signal and a different phase shift. The phase shift of the lows or highs is mainly an indicator that we are getting close to a limit of some sort with passive components like capacitors and coils
Super interesting stuff, ever since you did those other Transformer videos (not long ago) I've thought about the implications you showed, this will create more head scenarios for sure, LOL. :)
Every single post by Dave is enlightening. He is a Master of his craft. A legend. Thanks Dave for sharing this with us.
Thank you Ernie!!
“The thumpity thump of a car passing you with to much low end”! Simply beautiful
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Thanks Dave! Great video!
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Suggestion for next video THD graph with various harmonic content. Even at lower levels transformers will show considerable THD content at lower frequencies. Greatest audio related channel currently 🙌🙌🙌
Yes, I did. Thank you.
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Very nice Dave thanks when I need transformers I only use Jansen and use the correct one for the job just the other day I had to run audio signal down cat 5 60 meters and running past the breaker box so I put transformers at each end it worked better than i thought-35 db noise floor it works fine for now
👍👍 if ya use balanced lines down shielded cat5e, probably won't need the transformers as cat 5 is excellent at rejection with it's excellent twists. Especially, u/ftp or f/utp
@@DaveRat yes true that all happened cos the people doing the cable runs and run out of signal cable so the cat was being used as a draw cable nobody told me shit happens
🤙👍🤙
Two 100 mfd caps in series reverse polarity create a 50 mfd bi polar cap if not mistaken . Have been happy with the sound of Muse bi polars in the 100v range . Found nice results with replacing polar with bi polar in the signal path in ic signal chain . Upping the voltage where space allows. A nice clear informative video . Regards
In this setup I have 1 cap on pin 3 and 1 on pin 2
Nothing is in series and series is not needed as they are non polar.
And yes, if they were polarized, would need 2 in series for each of pin 3 and 2, and the caps would need to be 200 uf each to achieve this setup.
@@DaveRat thanks for the clarification ! Sorry about the diversion then . The Muse bi polar cap preference stands thou . Regards.
Very cool and interesting. I tried measuring different cap brands I have here but don't own gear accurate enough to find differences I could point to as clear and distinct
My guess is that since audio tends to go through many many caps, the cap type quality is both irrelevant and possibly important.
Irrelevant in that if audio goes through 30 caps, changing in to high quality is meaningless. But important possibly in that if each cap has a slight fegredatopn, changing all of them cod be advantageous
That said, if audio is not going through any caps and adding one, I would say the higher quality would be a logical choice
@@DaveRat Once you are above a certain level and using bi polar caps the difference is small vs time and trouble . Doing what you can to not have 30 polar caps in your signal path is a very good goal . The problem with many people is they are not pragmatic in their view of a situation IMHO . 😁
Agreed
I wonder what the difference would be loading down the transformers with pure resistors vs. the mic preamps since as you pointed out, preamps have caps in the circuit which will alter phase and frequency response. I might be cool to test with 1.2k-2kΩ resistors for mic level transformers and maybe 10kΩ resistors for line levels like to be close the impedance of the average line input. Then compare a couple of different mixer pre-amps and line inputs of comparable impedance. I realize DC resistance/resistors aren't a real world load, but it would give a non-reactive baseline to compare.
I will try and take a look. By theory, the impact of the loading impedance should impact the frequencies relative to that impedance.
So, since an audio preamp cap passes audio freqs, it should be fairly transparent at audio freqs
The trick of adding a small cap in parallel to the big blocker works OK but using an active op amp with a big cap in its feedback loop to strip DC away is cleaner still. DC blocking caps are notorious for causing loud "pops" as they charge up on power-up or when connecting cables.
Yeah the caps do cuz pops which can be troublesome. Sonically I think they present less of an issue than transformers except for the pop
great session!
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Are you putting the caps in parallel to raise their value to 200uF and connecting the bank in series with pin 2? Or is that one cap in series with pin 2, the other cap in series with pin 3 for filtration on the + and - of the 48vDC?
Option 2. Both pin 2 and 3 need blocking
@@DaveRat thank you!!!!
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So we can use np and polarize capacitor for dynamic mics combine to voice coil
Can you please tell the effect of increase vs decrease of phase (offset) for a particular frequency (low-mid-high)?
The phase shift itself tends not to be audible unless combined with the same signal and a different phase shift.
The phase shift of the lows or highs is mainly an indicator that we are getting close to a limit of some sort with passive components like capacitors and coils
cool
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so,this is rooting for detection ? right? and 2 thing have own responsibility about that things have coloring (eq) and volume ? cmiiw
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Super interesting stuff, ever since you did those other Transformer videos (not long ago) I've thought about the implications you showed, this will create more head scenarios for sure, LOL. :)
👍🤙👍
First to enter the classroom today!
Awesome!!