Okay, thanks for the information! so a lin pot would be better suited.
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Tech Help - Projects Page / Re: Quasar suck tone?
March 10, 2012, 04:37:02 PM
Hello there! My first most here so first of all welcome everybody and praise to the bean for his great projects 
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I thought I might post here instead of starting a new topic because I have a similar problem!
I built the Quasar 2 times, the first time I wired all the traces myself (looked pretty ugly), the second time I etched madbean's layout and built it on there. Both version worked fine, but both versions have had the same volume issue decribed above. In some demonstration videos I saw, the rc has unity gain with the gain almost completly backed off and the volume to 12 or maybe 1 o' clock. this wasn't the case with both my builds (unity gain at aprox. 3pm). I started investigating into op amps and found out that through lowering R5 to 15 to 10k I could increase the amplifying factor of the op amp. I did that and the volume issue was solved. But the op amp now amplyfies at a (aproximately) 1:3 ratio instead of a 1:1. That can't be quite right, can it? Is this a problem for an op amp? I am using the 4558 instead of the 4557, that is the only substitution! Maybe someone who has successfully build the quasar can share his experiences and can tell us if unity gain only at higher settings is normal with this build!
Thanks and regards, Nudelsuppe
. I thought I might post here instead of starting a new topic because I have a similar problem!
I built the Quasar 2 times, the first time I wired all the traces myself (looked pretty ugly), the second time I etched madbean's layout and built it on there. Both version worked fine, but both versions have had the same volume issue decribed above. In some demonstration videos I saw, the rc has unity gain with the gain almost completly backed off and the volume to 12 or maybe 1 o' clock. this wasn't the case with both my builds (unity gain at aprox. 3pm). I started investigating into op amps and found out that through lowering R5 to 15 to 10k I could increase the amplifying factor of the op amp. I did that and the volume issue was solved. But the op amp now amplyfies at a (aproximately) 1:3 ratio instead of a 1:1. That can't be quite right, can it? Is this a problem for an op amp? I am using the 4558 instead of the 4557, that is the only substitution! Maybe someone who has successfully build the quasar can share his experiences and can tell us if unity gain only at higher settings is normal with this build!
Thanks and regards, Nudelsuppe
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