My QRV-03 headphone amp is stolen.... - diyAudio
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Old 13th May 2003, 09:04 AM   #1
Electrons are yellow and more is better!
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Default My QRV-03 headphone amp is stolen....

I have found my current feeback headphone amp at a korean website. Nice job but they could have asked me first. Because I don't live in USA I will not sue them.




Click the image to open in full size.

Nice job though. They don't know that the design wasn't final.. Some parts need to be adjusted first. I wonder if they will notice what

http://www.headphoneamp.co.kr/bbs/vi..._member&no=188

Request: Could you korean guys here give me a short translation of what they say? Send me an email about it please.

The very original is the Mark Alexander amp which is patented, I know. I have asked Analog Devices several times about this and never got any clear answer. American lawyers! Anyway, I have found that low power supply voltage is not a good thing in this type of topology, better for a power amp. I will redesign the amp and skip the opamp (no hassle with AD).

The crime scene was here
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Old 13th May 2003, 09:45 AM   #2
Electrons are yellow and more is better!
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This "stolen thing" isn't so serious. I have made everything free except for the gerber files but maybe I should put a copyright note at my work?
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Old 13th May 2003, 10:13 AM   #3
dhaen is offline dhaen  Europe
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Old 13th May 2003, 11:25 AM   #4
Electrons are yellow and more is better!
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I have checked the picture gallery at this korean forum and I must say there are lot's of handy korean guys out there. Very nice amps, cmoy, gilmore etc.
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Old 15th May 2003, 05:11 AM   #5
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PerAnders -

I only say this once. If you can, copyright it. You worked hard on this thing. You designed it. I have never seen it like it. That means it is yours. When someone will commercialize your design, it will be too late and you will feel unappreciated.

It is not that you should feel greedy. I am just saying because you should at least keep your pride if not only for money.

Tomo
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Old 15th May 2003, 06:44 AM   #6
Electrons are yellow and more is better!
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I don't live in the USA so I won't sue anybody but maybe it doesn't hurt to write a copyright notice. My main attitude is to make everything free for personal use, but I haven't written this anywhere.
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Old 16th May 2003, 10:01 AM   #7
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Hey,

That is exactly what I mean. I don't think copyright works like patents. However, it prevent wonton copying of ideas.

Why don't you ask Mr. Nelson Pass about it. He must know something. (Age speaks loudly as well anyway)

Tomo
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Old 18th May 2003, 08:07 PM   #8
ppl is offline ppl  United States
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I can sure relate to this, as it has happened to me. Like yourself i post designs to allow other DIY folks to enjoy. however you still have those that will not just copy your work and then take credit as there own design by that time your design is being called somthing elce and your origanel is totaly forgotten. if like me you complain you will probaly get the same reply that since you posted it on line, it is a plublic domain circuit. i would also like a solution for this. I feel your Pain.
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Old 20th May 2003, 09:58 AM   #9
Electrons are yellow and more is better!
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Quote:
Originally posted by ppl
I feel your Pain.
It's not really a pain as long as it's non-commercial.

Can anyone (korean speaking) help me to get in contact with the builder? See link in the first post.

Note that his has used mica caps!
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Old 21st May 2003, 05:29 PM   #10
joensd is offline joensd  Germany
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Hi peranders,
I just visited the website and saw some amps from sijosae(the names on the left)
As he is posting regularly on Headwize he should know who built the amps (if it wasn´t even himself).
Did you try there already?

Regards
Jens
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