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Simple tube compressor schematic
Fred Nachbaur wrote: Gosh, that hardly qualifies as a "tube compressor." It's a pretty straight-forward op-amp based compressor with a tube as the variable gain stage. Note also that it's only been simulated... in other words, you're pretty much on your own. Cheers, Fred What about a simple logarithmic amp for compressing? I use one to drive a volt meter, which allows a bigger range of voltages to be read, and in Db. It uses a single diode in a shunt feedback path around a standard opamp. The non linear turn on voltage of a silicon diode is exploited. But I guess it could be done using a high gain tube amp, say a couple of 12AX7 with a CF buffer and a transfomer and shunt FB with a diode. I have never bothered to compress/limit anything, because whenever I see the results on a CRO of large compression, it sounds like mud as well. My local radio station routinely compresses its program, and the waves look like an SET amp which is clipping badly. This sounds awful. Other stations nearby show no sign of such radical compression/limiting, and they sound fine. Regards, Patrick Turner. marty wrote: http://music-club.rutgers.edu/headfonz/Comp5/Comp5.html On Tue, 02 Mar 2004 23:47:33 GMT, "Puppet" wrote: Hi guys What about a simple circuit for a veryvery cheap tube preamp-compressor for musical instruments such as bass or guitar? Most of the stuff I've found is not "pure tube" or has an output transformer. Is it possible to build something without silicon (except in the rectifier stage of the PS) and without output transformers? Any suggestion? I think that a transformerless solution would be cheap enough, and good for me even if the schematic were not so simple... Thanks for sharing your knowledge and for your help. I go to bed (in Italy is 01.00 am... an I have to work in 5 hours... :-() Puppet -- +--------------------------------------------+ | Music: http://www3.telus.net/dogstarmusic/ | | Projects: http://dogstar.dantimax.dk | +--------------------------------------------+ |
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