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  1. Hopefully I'm at the right place this time. I want to build a kevin gilmore blue hawaii amp. As a starting point I found the original http://headwize.com/?page_id=751 and the more recent http://gilmore.chem.northwestern.edu/BlueHawaii-T2-Servo-v1-2.zip (needs LTSpice). Is there a recent version without servo, with PCB's and all that? CCS is yet partly diskussed, has someone experiance with "mu follower Output" to decouple the complex loads partly from the tubes (see schematic)? What about a PS if no 500V pnp is found? From the PSRR viewpoint I'd start with the concept: "care about higher harmonics, PSRR can start to decrease at a cut-off in the 1 kHz region. And: just in that > 1kHz range, where the measured PSRR comes in, additionally whatsoever interactions between PS and music could come in as well. So starting out with "1 V ripple on the output won't be DIRECTLY audible" could work, but I'd like to have some more safty. So what about a good old plain and simple low-pass with (no 6dB/oct, not L...) R*C*2pi=1Hz first? (Ok, R2 burns some W if some mA is needed, but there is enough space, 150R will do too.)
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