afaik there are enough boards and yes there is a regulator board, you must sign up for that over at 'the wire' headphone amp GB thread. or perhaps opc will just see it here and add for you.
Nice case Hypertune.
I got inspired by your design and came up with my own interpretation. I would suggest to limit the extension of the grill partern of the top and bottom plane near the corners to provide a plain area of aluminium for better thermal coupling and perhaps a bit more solid construction.
Not sure if I express myself correctly (english is not my native language).
Here is an example, what do you think?
I got inspired by your design and came up with my own interpretation. I would suggest to limit the extension of the grill partern of the top and bottom plane near the corners to provide a plain area of aluminium for better thermal coupling and perhaps a bit more solid construction.
Not sure if I express myself correctly (english is not my native language).
Here is an example, what do you think?
Attachments
Made some slight mods to give an indication of what my crossover/control unit will look like. I have shamelessly copied NAGRA's design for the knobs.
One knob will do power & mute, the other volume. This unit will also trigger remote turn on/off for the amplifiers and possibly mute of the LME's.
One knob will do power & mute, the other volume. This unit will also trigger remote turn on/off for the amplifiers and possibly mute of the LME's.
Attachments
This is wrong on so many levels. Do you assume someone is poor because they cook their own food at home?
EDIT: Maybe you do. I don't know what you folks in California are like.
I'd have to agree with you.
I use Solid Edge ST3 for modelling, but also have a seat of NX Cam and Esprit Cam.
Please excuse my messy desk:
Attachments
Just kidding, the challenge of learning the program is as much of a challenge as the price, you can only do so many things. I use autosketch for work and that is a challenge for me. After I learn to program PLC's I may go back and become more CAD proficient . I like the 3d modeling tools that are becoming available Sketchup seems pretty versatile for a free program. I diddled with Alibre until it wanted me to buy a license. By the way nice collection on your bench.
Bill
Bill
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glad you were joking because thats ridiculous, why do you think that someone that might spend well over 10k and several years building a speaker system couldn't afford auto cad? many with multiples of everything. besides only low end thoughtless painting but numbers diy saves money if you are lucky and only if you cheap out on everything and don't consider your time worth anything. saving money is a stupid reason to diy.
"Saving money is a stupid reason to diy." Agreed,
"EDIT: Maybe you do. I don't know what you folks in California are like."
They are like most people, the majority of people in California are transplants. It is rather odd people like to pigeon hole Californians.
Not sure you guys are so defensive, I thought you would have seen the absurdity in my statement, and I am envious of your CAD skills.
Bill
"EDIT: Maybe you do. I don't know what you folks in California are like."
They are like most people, the majority of people in California are transplants. It is rather odd people like to pigeon hole Californians.
Not sure you guys are so defensive, I thought you would have seen the absurdity in my statement, and I am envious of your CAD skills.
Bill
Here Here, It has inspired me to up the anti on my testing abilities. I have never been able to quantify my creations in the past. They always sounded good but I had no good way to tell if they were performing as they were designed to. I have purchased a high end sound card and a new DSO scope. I hope to use these as test sleds to bring my skills up. I can compare them to Owens test figures. I know the sound card will not compare to what he is using but it will give me a comparison.
Bill
Bill
Hi Guys,
Sorry for the slow week... I've been trying to get some of the front end work out of the way with the large parts order so I can reduce the time it'll take to complete the group buy after I've finished testing the boards.
Some of the items have longer lead times when you need several hundred of them
As for the boards themselves, I won't be able to pick them up from the US until Saturday morning, but it won't be long now!
I also forgot that I posted the final layout for all the headphone amps and the PSU over in the other thread, but I never posted the final amp board in this thread. It's attached below. Final board size is 2.525" x 1.600"
It should also address this clever question from AKN:
I did indeed split the ground planes between the low level LME front end and the high power output transistors. These planes can be tied together beneath the LME with a 0R, or they can be routed separately back to the PSU and tied there. I wanted the user to have the most possible flexibility in grounding since there will be several different supplies used with this amp. I made sure that it's possible to implement all the grounding tips in the LME documentation.
I also added a better mute pin implementation that doesn't require different resistor values for every supply voltage. It's the same implementation as the reference design from National using a zener. I've also added an easy tie point for a switch for those who want access to the amplifier's mute function. Just add a switch and closed = mute while open = on.
Hopefully this addresses your concerns
Cheers,
Owen
Sorry for the slow week... I've been trying to get some of the front end work out of the way with the large parts order so I can reduce the time it'll take to complete the group buy after I've finished testing the boards.
Some of the items have longer lead times when you need several hundred of them
As for the boards themselves, I won't be able to pick them up from the US until Saturday morning, but it won't be long now!
I also forgot that I posted the final layout for all the headphone amps and the PSU over in the other thread, but I never posted the final amp board in this thread. It's attached below. Final board size is 2.525" x 1.600"
It should also address this clever question from AKN:
Owen, earlier in this thread you mentioned a three layer PCB including a ground plane. Is this ground plane divided in more than one area like small signal ground and decoupling ground? If so I'm delighted
I did indeed split the ground planes between the low level LME front end and the high power output transistors. These planes can be tied together beneath the LME with a 0R, or they can be routed separately back to the PSU and tied there. I wanted the user to have the most possible flexibility in grounding since there will be several different supplies used with this amp. I made sure that it's possible to implement all the grounding tips in the LME documentation.
I also added a better mute pin implementation that doesn't require different resistor values for every supply voltage. It's the same implementation as the reference design from National using a zener. I've also added an easy tie point for a switch for those who want access to the amplifier's mute function. Just add a switch and closed = mute while open = on.
Hopefully this addresses your concerns
Cheers,
Owen
