[cheap-Jack]

Hi.

(1) Why what I do works. The brain. You'll see people arguing but they've never heard it. http://www.audiocircle.com/index.php?topic=52811.0

(2) Anyways, happy day to everyone with inferior sound.

I read yr link.

I've never seen any RFI CMC built this big & wound such way (like a standard 60Hz rippling choke BUT wound on 2 separate bobbins) to be effective for RFI common mode cancellation.

So tell us what is the primary function of the filter you have built? It dos not appear to me this is a RFI filter.
A LF noise filter, maybe. As the way the so called CMC is built (on 2 separate bobbins) makes me think this way. Definitely not for RFI.

If that is the case, we have not even on the same page.

Yes, this is a tweak, for making yr rig sound better, maybe. If it works for you, fine. I'd not argue on that though I would NOT do so as my inline brandname RFI filters work bigtime, technically on RFI & sonically.

FYI, many audiophiles have installed a LF choke across the live line/neutral of the wall outlet where their rig plugged in & found the sound improved a lot. Less costly & so simple to install.

c-J

[cheap-Jack]

(1) Everything!!!  Henry W. Ott is the go to reference sourece  from DC to microwave,  from small voltage to big power.


(2) The book is about 850 pages long.  Don't expect every page to apply to every situation!  I doubt that many have read every page, I don't plan to.

(3) More and more low-power audio equipment is operating off-line.

(4) That's not how grounding to Mother Earth works.

(1) So that book is yr reference 'bible' may I assume. So why don't you answer the questions I posted to you above related to home audios online hooked up to the mains AC wall outlets, with reference of that book?

(2) It doesn't matter how many pages of the book nor how many similar textbooks available out there. It is imperial we can make use of it for the benefits of our home audio system.

FYI, my reference 'bible' is:- "Radiotron Designer's Handbook, 4th edition", a 1,433-page radio/audio book jointly written by engineers & PHDs of similar disciplines. I got it on-line free of charge. Indeed I've learned a lot from this textbook & have applied it to my audio designs. Thanks goodness for that.

(3) Who cares about Ipod, MP3 & the like off-line gadgets? We are talking about home audios for serious music listening, which must be powered from the AC mains.

(4) So tell us how yr reference bible tell you to handle grounding of our home audio rig to the Mother Earth.
     LV & L current situations.

c-J

[Speedskater]

C-J it's time you do some serious reading (about AC power & audio) on your own.
I have more links if you need them.

p.s. I have two copies of the "Radiotron Designer's Handbook". One of which I got almost 50 years ago.
p.s.2  What are "LV & L current situations." ??

[JohnR]

"Low voltage and low current"

[cheap-Jack]

Hi.

"Low voltage and low current"

Yes, our home audio components are built rated for 120V60Hz or 220V50Hz mains. So they are all LV & L current gear.

What we worry about earthing problem should be HV & Hi currrent electric machines, 2 -3 phase powered in commercial & industrial locations where proper & effective grounding can be critical in case of lightning & other natural disaster. Highly digitallized commercial & industrial areas also demand effective grounding to get rid of RFI problems.

We should not over worry about effective grounding for home audios. Like my case at home, I got dedicated powerlines with dedicted INSULATED grounding wires connected direct to the house central grounding point, plus dedicated inline powerline RFI filters. I never got any RFI & other LF grounding issues.
I play vinyl!!!

c-J

[Folsom]

CJ it would blow your mind. My friends rig cost over $10k before my conditioner, and he won't live without one.

RFI isn't the specific goal, but it is addressed to certain degrees.

[cheap-Jack]

Hi.

CJ it would blow your mind. My friends rig cost over $10k before my conditioner, and he won't live without one.

RFI isn't the specific goal, but it is addressed to certain degrees.

 

Many audiophiles like tweaking & all claim their tweaks work. As I said, if your powerstrip tweak works for you, fine! Surely it is not a RFI device due the way you built the so called CMC.

Let me tell you what I've installed something similar for my tube power amp many years back. The heaters voltage was found somewhat a bit too high (6.6V or so instead of 6.3VAC) for each channel. So instead of
adding a pair resistors to each heater supply winding of the power iron, to drop the 0.3VAC like most DIYers always do. I built a commom mode BIFILAR coil by handwinding 1 pair a few feet of magnet wire on a small handmade wood former. These few feet of magnetic wire were enough to drop 0.3VAC heater voltage with the total heater AC current of 2.1A per channel passing thru the coil. By adding a 0.1uFAC cap immediately across each I/P arm of the heaters circuit, it forms an effective RFI common mode RFI filter as well as an AC voltage dropper.

A common mode coil MUST be wound BIFILAR with a PAIR of magnetic wires wound tightly parallel together to achieve the common mode cancellation function. One coil for the live line & other bifilar coil for the neutral line.

c-J

[Folsom]

What makers you think I made my own CMC's?     Yeah so called, by the people that make them and sell them to dozens of forum members on here.

[cheap-Jack]

HI.

What makers you think I made my own CMC's?     Yeah so called, by the people that make them and sell them to dozens of forum members on here.

So why don't you direct my comment to whoever built such so called CMCs & sold them to you?

But if you don't care, why should I give a crap!

c-J

[Folsom]

Sorry I just it was funny that you pictured me winding my own CMC's.

These are my favorites. But sometimes I have to use different ones depending on size of amplifiers in use. That is talked about here.