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In the Forum: Melquiades Amplifier
In the Thread: A proper implementation of low-pass filters
Post Subject: Low PassPosted by IslandPink on: 1/1/2011
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Ah thanks Romy , I should have spotted the option of filter before vol pot. This may be enough for now. I do have some Dale stepped-attenuators from a previous project if I need to further experiment .
Now, if I'm calculating, do you know if the vol pot ( eg. 100k to ground ) after the R/C will affect the R/C values ? The grid ( C3m in pentode ) is 'out of the picture' of course.
I can use lower impedances for the R/C bit first to try it out - eg. 2200R/0.1uF . These should be simple to find in good quality parts .
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