Tube DIY Asylum: Re: How to design a passive single-network RIAA (two tubes) by Kurt Strain Do It Yourself (DIY) paradise for tube and SET project builders.

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Posted by Kurt Strain on March 26, 2002 at 09:44:11

In Reply to: Re: How to design a passive single-network RIAA (two tubes) posted by Fred Humphrey on March 26, 2002 at 09:02:12:

Thanks, Fred. That's something I have been ignoring all this time and shouldn't. I know that some triodes vary more drastically than others with bias point, and my 6ER5 is one of them. For the best number for rp I might suggest using the plate curves, but the RDH4's method is of course a good one.

rp = (delta Vp / delta Ip)
while keeping Vgk constant around the operating point.

Kurt

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