Chokes for SE class A - Page 3

Magura · 9th February 2010, 07:59 AM

I would also doubt the 50A figure. It would have to be 4.6mm wire to achieve that.

Magura

Tyimo · 9th February 2010, 08:30 AM

Quote:

I would also doubt the 50A figure. It would have to be 4.6mm wire to achieve that.

Yes, and the iron is very small too!
Tyimo

woody · 9th February 2010, 01:18 PM

That is a BIFILAR choke they somehow work differently. There was a little talk about
this in a thread about using a choke input filter for the zen amp. Someone had found
bifilar choke that looked good for a choke input filter and was informed it just wouldn't work. But back to the discusion of size. I have a 12A 4.8mh choke and it's
about the same size as that one in the picture.

carpenter · 9th February 2010, 02:26 PM

I'd be surprised if Hammond would be willing to risk their reputation with false or misleading performance data. The choke is supposedly wound with large gage wire. Judging from the impedance, I'd be incline to believe them.

The choke never overheats, unlike my hand wound choke (11 gage wire) which ran up to 90C and didn't offer as much bass.

At any rate, these units sound excellent in my little amplifiers.

Tyimo · 07:25 PM

Quote:

That is a BIFILAR choke they somehow work differently.

Bifilar is nothing special.
You can use serial, paralel or balanced the wires.
I serial the induction will be doubled.
In paralel the induction wilbe halved. etc.

Quote:

I have a 12A 4.8mh choke and it's
about the same size as that one in the picture.

I have also one somethig like yours. Made with an EI150 iron and wery thick wire.

Tyimo

Tyimo · 9th February 2010, 07:27 PM

Quote:

At any rate, these units sound excellent in my little amplifiers.

This is the most important!

Tyimo

Zen Mod · 9th February 2010, 07:34 PM

"bifilar" in Carpenter's case means that's split load intended choke .

Tyimo · 9th February 2010, 07:59 PM

Yes. And with a simple thin wire and small iron I can't believe that it has 300mH with 50A! Maybe 2-3A and not more...but it is enough...

djk · 9th February 2010, 10:44 PM

The choke shown in post #18 is not rated for DC use.

carpenter · 9th February 2010, 11:56 PM

Quote:

Originally Posted by djk

The choke shown in post #18 is not rated for DC use.

Good start... do go on.

9th February 2010, 07:59 AM	#21
Magura diyAudio Member Join Date: Oct 2003 Location: Denmark, Viborg	I would also doubt the 50A figure. It would have to be 4.6mm wire to achieve that. Magura __________________ Everything is possible....to do the impossible just takes a little while longer. www.class-a-labs.com

9th February 2010, 02:26 PM	#24
carpenter Paper mache horn fabricator diyAudio Member Join Date: Mar 2002 Location: Oregon City, Oregon	I'd be surprised if Hammond would be willing to risk their reputation with false or misleading performance data. The choke is supposedly wound with large gage wire. Judging from the impedance, I'd be incline to believe them. The choke never overheats, unlike my hand wound choke (11 gage wire) which ran up to 90C and didn't offer as much bass. At any rate, these units sound excellent in my little amplifiers. __________________ I enjoy audio so much that I constructed a web site. I share my ideas at: www.inlowsound.com

9th February 2010, 07:34 PM	#27
Zen Mod Official Court Jester diyAudio Member Join Date: Jan 2003 Location: ancient Batsch , behind Iron Curtain	"bifilar" in Carpenter's case means that's split load intended choke . __________________ my Papa is smarter than your Nelson ! tnx to clean thread ; Cook Book ; PSM LS Cook Book ; Baby Diyaudio FORUM ; BAF Forum & Gallery

9th February 2010, 10:44 PM	#29
djk diyAudio Member Join Date: Feb 2001 Location: USA	The choke shown in post #18 is not rated for DC use. __________________ Candidates for the Darwin Award should not read this author.

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9th February 2010, 01:18 PM	#23
woody diyAudio Member Join Date: Jan 2002 Location: Tyrone Ga. U.S.A.	That is a BIFILAR choke they somehow work differently. There was a little talk about this in a thread about using a choke input filter for the zen amp. Someone had found bifilar choke that looked good for a choke input filter and was informed it just wouldn't work. But back to the discusion of size. I have a 12A 4.8mh choke and it's about the same size as that one in the picture.

9th February 2010, 07:59 PM	#28
Tyimo diyAudio Member Join Date: Nov 2002 Location: Hungary	Yes. And with a simple thin wire and small iron I can't believe that it has 300mH with 50A! Maybe 2-3A and not more...but it is enough...

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