macka said:****
I am surprised that a fine linguist like Pinkmouse hasn't implemented a filter for this word. I know it would have immediately come up if the post was mine.
What's your problem anyway, mate....?
The title of this thread is jwb's ultimate aleph headphone amp, not
"Let's ***** about Phred making fun of Zane Grey's latest novel, The Art and Zen of Crossover Maintenance.
If you have a problem about someone or something, then take it to the appropriate thread. And butt out of this one.
As for:
"Beside 's my inbox is spilling over with messages of agreement."
If you want to get into a ****ing match over this one, you may find yourself on the losing end of yet another argument.
And, no, I don't share my hair brush with anyone. I have enough problems already without worrying about getting someone else's cooties.
"I don't want to have to 'splain this again."
-Joe Bob Briggs, Drive-in Movie Critic of Grapevine, Texas.
(Glad to see that the filter really does work.)
The title of this thread is jwb's ultimate aleph headphone amp, not
"Let's ***** about Phred making fun of Zane Grey's latest novel, The Art and Zen of Crossover Maintenance.
If you have a problem about someone or something, then take it to the appropriate thread. And butt out of this one.
As for:
"Beside 's my inbox is spilling over with messages of agreement."
If you want to get into a ****ing match over this one, you may find yourself on the losing end of yet another argument.
And, no, I don't share my hair brush with anyone. I have enough problems already without worrying about getting someone else's cooties.
"I don't want to have to 'splain this again."
-Joe Bob Briggs, Drive-in Movie Critic of Grapevine, Texas.
(Glad to see that the filter really does work.)
I'm not too happy to report that a substantial amount of the audible noise on the output of this amp is contributed by the relay attenuator. I haven't really figured out why yet. The micro was putting some nasty noise on the power rail of the relays, but placing a small cap between the power pins (there's just enough room for an 0805) on each relay cleaned up the scope trace without reducing the audible noise. Neither does removing the microcontroller altogether help.
With the attenuator disconnected and the inputs shorted, there's still some barely audible noise. My only idea for getting rid of it was to place a cap across the LED stack reference in the diff input's current source, but that point is extremely quiet already. I added the cap to test but of course it didn't help.
With the attenuator disconnected and the inputs shorted, there's still some barely audible noise. My only idea for getting rid of it was to place a cap across the LED stack reference in the diff input's current source, but that point is extremely quiet already. I added the cap to test but of course it didn't help.
Macka attacka
"Please take your pointless attacks somewhere else."
Apparently he did.......... but with a link pointing back to this thread.
http://www.diyaudio.com/forums/showthread.php?postid=272259#post272259
"Please take your pointless attacks somewhere else."
Apparently he did.......... but with a link pointing back to this thread.
http://www.diyaudio.com/forums/showthread.php?postid=272259#post272259
Problem?
Hi macka,
I just got an email from Alma Crocker dealing with this little problem.
macka said:The point is no body likes insults but Fred thinks he can sneer in anyones thread about anything that suits him at the time purely because of the soft **** mentality of the on lookers who then go on to copy him.
macka
Hi macka,
I just got an email from Alma Crocker dealing with this little problem.
I sold the last PCB already. I can post the Gerber files, but you should understand the following:
1: The mounting and cooling are designed for the Sun 411 SCSI disk case
2: Some devices are mounted under the board. It is difficult to build
If you still want, I will post the Gerber files.
Cheers
jwb
1: The mounting and cooling are designed for the Sun 411 SCSI disk case
2: Some devices are mounted under the board. It is difficult to build
If you still want, I will post the Gerber files.
Cheers
jwb
Oh yes, if you could post it, it would be great. I may try to adapt it to my own setup but that would be a great first step ...
If the gerber files are not to huge, my email is :
akira9b@hotmail.com
Thanks a lot ...
If the gerber files are not to huge, my email is :
akira9b@hotmail.com
Thanks a lot ...
Hi to all!
Recently I have bought a new heaphones - MBQuart QP450 Pro. I have built a little portable amplifier to use them with it. I would like also to build high end amplifier- rally good one and I think that this project would be suitable for it. My head's have internal impadance of about 300R. WOULD THIS AMP WORK WITH THEM GOOD?
Could somebody tell me please the subsitutes for the current diodes J506 and J511 used in this project so I don't have to buy them from mouser.....
JWB- it looks really nice. Nice job and thanks for posting it here.
regards
daniel
edit:
btw: how does it sound zen like and aleph like....?
OOOPSSS: MY FRIEND LET ME KNOW A MINUTE AGO THAT I COULD FIND THOSE DIODES IN RS- COMPONENTS CATALOGUE. Anyway- nice job JWB!
Recently I have bought a new heaphones - MBQuart QP450 Pro. I have built a little portable amplifier to use them with it. I would like also to build high end amplifier- rally good one and I think that this project would be suitable for it. My head's have internal impadance of about 300R. WOULD THIS AMP WORK WITH THEM GOOD?
Could somebody tell me please the subsitutes for the current diodes J506 and J511 used in this project so I don't have to buy them from mouser.....
JWB- it looks really nice. Nice job and thanks for posting it here.
regards
daniel
edit:
btw: how does it sound zen like and aleph like....?
OOOPSSS: MY FRIEND LET ME KNOW A MINUTE AGO THAT I COULD FIND THOSE DIODES IN RS- COMPONENTS CATALOGUE. Anyway- nice job JWB!
I prefer the sound of the Aleph CS versus the regular (Zen) CCS. It simply sounds a little more pleasant, less tiring than the Zen setup. It may be that with the Zen CCS the amp clips at my preferred output. I haven't measured it. And contrary to what somone said upthread, efficiency does matter, even in a headphone amp. Aleph is well known for having lower distortion at the same output power compared to Zen.
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