I also checked Eaglesoft and since it doesn't include the sourcecode it will probably be though to get it running. The JLH-amp is mainly for the fun of it (don't tell my teacher though ).Ĭoncerning the software, I checked Designworks and it seems to me that the Liteversion of it isn't available for OS X yet, the Proversion is too expensive to me. If I understood it correct it is very easy to switch between Class-A,A/B,B. It is not of my own so I can’t take responsibility for it.īAM: That is why I plan to build the Douglas Self design. The schematics capture part is also good and easy to use and it is FREE.Īttached the schematic of the tri-modal amp I have found. When working on a win-system I would recommend using the already mentioned SpectraSoft software. IMO their software is still standing out the mass out there when you concern the price, graphics capabilities and ease of use. ps file is can be easily imported in AI for touch-up. I also still use it for schematics that have to go in print. Once you have made your own collection of libs it works pretty fast. I still use a 68k version (V3.5) running on Basilisk for quick setting up prototyping schematics. In those days there was only some crude DOS software, programmed to the “bare steel”, or there was software for Unix mainframes costing tons. Later on they came with a nice Mac version of ABEL, a PLD design package originally developed by DATA IO. So they came up with a piece of software (DesignWorks) that was easy to use by hardware people and relatively bug-free. In those days the people at Capilano were the only ones that understood that hardware people are working completely different than software people. In the late 80ties I did an extensive search for CAD software for the Mac. Since I only have low-level education and are rather young, I'm not qualified to a student-license, so the application can't be very expensive, free would be preferable. My computer is an iBook with Mac OS X, that means I can run all BSD/Linux programs but not old macintosh applications. I'm also searching for a good program to draw circuit diagrams, currently I use xfig but it is not very convenient to work with. Does anyone know where I can find it?Īlso if anyone have Spice3-models of it and are willing to share it I'd be very happy. I have searched for it on the net, but to no avail. I have the circuit in print in the book "Audio Power Amplifier Design Handbook" but would prefer to have it in digital form. I have decided to use a John Linsley Hood construction for my class-A amp and am thinking of building the Trimodal Amplifier by Douglas Self for comparison. I'm currently working on a small project for school where I shall compare distorsion in Class A and Class A/B amplifiers.
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