PreAmp

I still have lots of vinyl records so an RIAA equalisation preamplifier is a necessity. In the 80's I built one, put it in a pretty orange box and it worked fine, based on TL084 chips which were really new then. They were also cheap and noisy. For some reason I never upgraded them to TL074's, the low noise versions, and my next preamp was based on NE5534's which became very popular, and the preamps became very complicated. 

Eventually I went minimalist, built a valve preamp, with valve power amplifier but while the power amp was fine, the preamp still wasn't there and I resurrected my 1980 design, this time with TL074's and it was ok. Time moved on, and still not happy, I invested the time to redesign the build with new components, a dual battery/mains power supply with charger. Built, it didn't sound anywhere as good but swapping the old model back with the new battery PSU made all the difference, happy. So this is my RIAA preamp page.