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Post by johan on Apr 30, 2007 11:41:45 GMT -5
Some soundclips of the rude circuit: first is clean start neck pu on a super reverb Download GermaniacClean.mp3here the germaniac is engaged, at first at minimal gain, gradually turning it up. Halfway through, I switch to neck+mid pu. as was initally doubted, also be me when I tried it on a small amp, it is a CLEAN boost pedal that overdrive a little at maximum gain. It is hard to tell from the clips the difference in volume, but I had to really back up the mike a bit more to avoid complete clipping on the recording. The boost is not subtle but the grain of the sound is. I would really want to include a master volume control on the box so I can almost max the gain at acceptable levels. The background noise you hear is unavoidable with the circuit on breadboard sitting on my mixing desk and uninsulated jacks and all. These all go away when boxed up, I assure you. Download Germaniacboosted.mp3i know putfile is a drag, just click through 3 times, but no other way to host. sorry
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Post by dd842 on Apr 30, 2007 13:56:56 GMT -5
Johan, Sweet! Nice playing, and nice retro sound Just for laughs, I ran a sample of your music through a dead-simple gallium guitar booster. putstuff.putfile.com/74629/1323941 Dan P.S. The joke is that Gallium shares some characteristics with Germanium ... but it also melts in your hand
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Post by ChrisK on May 1, 2007 18:13:23 GMT -5
Sorry, I hadn't looked at this thread for a while. The standard bias network's function is to make every one of a particular transistor-based circuit behave very much the same regardless of the individual instances of a particular transistor part number used. For a common-emitter topology, this network typically is a base resistor to common, an emitter resistor to common, and a base resistor to a positive bias point. In essence, from a product production reliability and repeatability perspective, the variations and leakages that make a non-standard circuit unique and most useful to the experimenter also make it intolerable to volume production engineering. The main reason why general high-fidelity amplifier manufacturers don't use vacuum tubes is the same reason why they don't use germanium transistors, they're lossy, unpredictable, and generally crappy. From the perspective of reliable, repeatable product production, silicon is far better. This is why SW DSP-based (Soft Ware Digital Signal Processor) effects are so flexible and repeatable; the bits never vary, change, warp, rust, wear out, or die. And like all good clones, they're always identical. Apparently germanium transistors are still fun to design with tho', eh?
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Post by johan on Jun 15, 2007 16:32:32 GMT -5
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