unless patented there is no protection for a circuit - and even the patent doesn't prohibit others publishishing the circuit, discussing it publicly
a patent only give limited time rights to "make, use, sell" - in exchange for making the idea public
copright only protects exact copies of an expression of an idea - a artwork, text, program...
if you redrew the schematic, made up the BOM yourself You have the copyright on that excact drawing of the circuit - no more, no less
a patent only give limited time rights to "make, use, sell" - in exchange for making the idea public
copright only protects exact copies of an expression of an idea - a artwork, text, program...
if you redrew the schematic, made up the BOM yourself You have the copyright on that excact drawing of the circuit - no more, no less
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Number 6 awakens 2Km from me..........Welcome to Portmeirion in North Wales| Portmeirion | Portmeirion
I'm happy you had no problems. I was worried at first but no problem now.
I attenuate after active xover anyway which has cured it.
I'm very happy with the sound and it gives me what I was after, controllable HF boost for my poor old ears, and equally controllable LF boost to help out my OB subs. Much better sounding than the EQ I was using.
Many thanks to Doug, Jan and Carl for helping extend my listening pleasure
Late request for preamp boards
From the latest batch my two sets received as promised. Thanks Carl!
The latest batch of PCBs have arrived.
I have built a first article and have bee listening to it for the last 24 hours or so! All works as expected.
Those builders that have paid will be shipped Monday morning (ie: tomorrow).
I do have a few extra kits but not many.
From the latest batch my two sets received as promised. Thanks Carl!
Only one ? I suggest the two on the left, at least :
The Amplifier Institute.
Extremely informative and easy reading.
Hey Scott, thanks for the tip/link !
https://www.youtube.com/watch?v=PfPAIiOQ4lI (best Dutch group ever ?)
https://www.youtube.com/watch?v=PfPAIiOQ4lI (best Dutch group ever ?)
Oh boy, it's urgent to purchase this one if you don't know them : https://www.discogs.com/fr/Mecano-Titled/release/921791 : incredible music + voice : good composition!
older : https://www.youtube.com/watch?v=woOofXhssDs
older : https://www.youtube.com/watch?v=woOofXhssDs
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Hi guys,
would you please help me to find some documents/diagrams/BOMs regarding this project? I found on this thread only the PCBs and diagram for the power supply, but nothing regarding the preamp and its capabilities.
thanks,
Adrian
LE: I just found it: https://linearaudio.net/douglas-self-preamp-linear-audio-vol-5
would you please help me to find some documents/diagrams/BOMs regarding this project? I found on this thread only the PCBs and diagram for the power supply, but nothing regarding the preamp and its capabilities.
thanks,
Adrian
LE: I just found it: https://linearaudio.net/douglas-self-preamp-linear-audio-vol-5
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Is there anything wrong with that, esp. if the individual is a known expert? Since I am not a good marketer of myself or my ideas, I am always looking at successful models to see what I can glean from them.
Certainly, the DSelf Website is fairly well designed, with no unnecessary frills or self-sggrsndizing statements, IMO.
The latest batch of PCBs have arrived.
I have built a first article and have bee listening to it for the last 24 hours or so! All works as expected.
Those builders that have paid will be shipped Monday morning (ie: tomorrow).
I do have a few extra kits but not many.
Carl
Just tried to download the BOMs for the power supply and main preamp from the links on message #1 but got an error message from Dropbox saying that the files were either no longer there or were "private". Could you help with this please?
Thanks in advance,
Graeme