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| amputator - stereo tube filter | |
| a friend of mine built a lot of amateur-tube-gear and they really sound phantastic. he encouraged me also to build one. i never had anything to do with tubes to that time. it was a bit strange that just in that week i found an old tube-record-player (mono) on the street. my friend gave me some schematics and after a bit of experimenting with this recordplayer i also was a tube-fan. it is a lot easier if you already got a transformator with the appropriate voltage-outs for the tube. |
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| i bought a charisma 2 to check out how the "experts" make tube-gear but it was totally disappointing. no chance to get real distortion out of that thing. i had to change some resistors to blow up the input-gain. but it still was to calm. there were no real interactions between the frequencies - just to perfect and boring. i changed the resistors for the original ones and sold it. so i had to make my own charisma-tube-gear. |  |
| the amputator has a simple 2 band-tone control you can find in most of these old tube-radios. one for each channel. 6.3 mm-monojacks for in and out. and separate controls for input and output. no silicium, just resistors and some condensators and a tube for each channel. of course it makes a lot of noise and hum. |  |
| the tubes are just bought in an electronic-shop. they are not "measured" to fit to each other. therefore the two channels behave (and sound) different. but this gives an interesting stereo-effect because of the phase-differences. i installed a switch with which you can set left to right and vice-versa. so i can easily detect the differences in level and treble-bass-settings. |  |
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i upped a mp3 with a sound demo of the amputator. it contains 3x the same loop. first "dry", second with harmless settings and third extreme settings. |
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