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Diabolical Artificer · 29th Jun 2019, 8:11 am

I've read a RIAA stage using FB will stay accurate as the valve ages, I've found passive circuits work best in the few circuits I've tried so far, they're more stable for a start and less frolicksome.

Andy.

29th Jun 2019, 8:11 am	#78
Diabolical Artificer Dekatron Join Date: Jul 2009 Location: Sleaford, Lincs. UK. Posts: 7,662	Re: Valve preamp. I've read a RIAA stage using FB will stay accurate as the valve ages, I've found passive circuits work best in the few circuits I've tried so far, they're more stable for a start and less frolicksome. Andy. __________________ Curiosity hasn't killed this cat...so far.