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In Reply to: Re: Hammond choke 193L installation for dummies? posted by cporada@cabnr.unr.edu on April 21, 2007 at 20:17:23:
So far, i can tell that the soundstage is bigger and the high is cleaner, not edge like i used to hear. I guess it will take sometimes to tell if it makes huge difference or not.I assume if your line is really noisy , then you can hear the big difference. I plan to install two more chokes if i can hear more diff. in the next week. I also have quietline filter which is coming to my house next week too. And i like to experiment the mix between Quiteline and Hammond Choke.
Follow Ups:
Actually it has nothing to do with noise on the line...the a/c is nothing but 60Hz...harmonics are on the neutral due to power supply leakage...what you are hearing is the damping of the a/c wall outlet. The choke's effect is very local...it's only effecting the location it is plugged into...that is why I wire them into power cords...the choke reduces the ringing of the cable. It offers very little effect to other components one outlet over in the daisy chain...but when you reduce the ringing of one location it's amplified through out the rest of the circuit.
Thanks, Alan.Another question: Right now i plug the choke in the receptacle (regular one seen at Homedepot or Lowes) which is next to the one that my power conditioner connected to.
1> should i plug it directly to the outlet where my gears are for better effect? I thought as long as it's in the same circuit, it'll be ok.
2> Even though i carefully connect wire to the choke (heat shrink and electrical tape applied), I'm still reluctant to leave it on all the time. So, i unplug the choke when i leave for work in the morning and put it back an hour before listening. Would it be ok?
I now have 7 choke's in my system. 5 of them have been plugged in 24/7 for the last 2.5 years with zero problems. The other two are new, but I haven't had any problems. I have hundreds installed in my clients set up's also with zero problems. On a 120v 60Hz circuit the choke only draws 64mA's...that's nothing...it can handle up to 300mA...which is why the choke is ice cold to the touch.Yes same outlet as system is best.
Thanks, Alan.This is the best tweak i've ever done on my system. It sounds much better than i thought it would be.
Again, thanks for all your best suggestions.
Glad to hear it....enjoy :)
Hi Alan,The chokes are rated at a particular DC current because their inductance will be higher at lower currents and lower at higher currents. See the link.
The choke used as an AC filter will draw slightly less than 64 mA because it has no DC current. However, this does not affect its observed performance.
I expect you are getting improved performance from the 193M because of the higher Ohmic resistance of the winding. Two of them in series should work better.
Al
That is correct Al. I wasn't quoting the mA's specs as a reason why one filters better than the other...I just brought it up as a safety issue so folks understand the choke is safe to use on a 120v circuit. I can't tell you how many e-mails I have received in the last couple of days from people concerned about a/c usage.
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