Discrete All-Transistor RIAA-Equalized MM Phono Preamplifier 2.

[@robertkovar8710]

switching DC-DC XL6009 (400kHz) for phono is act of brutality, :) you need low noise power supply - linear (capacitive multiplier or shunt )

[@buildaudioamps]

Please refer to the schematic diagram. Test results showed otherwise. Thanks.

[@joancarlescanadas5123]

Totalmente de acuerdo; es un circuito elevador de tensión que, usa señal de conmutación y produce ruido ; se deben usar una power supply convencional con transformador separador, estabilitzador y filtros bobinados o bancos de baterias de 1,5V en serie, hasta obtener los 32V de trabajo. Piensenlo!

[@robertkovar8710]

for maximalist LT3042, preregulation LM317

[@buildaudioamps]

@@joancarlescanadas5123 My reference power amplifier is an Icepower 1000ASP,
shop.icepoweraudio.com/wp-content/uploads/2023/02/ICEpower1000ASP_Datasheet_1_7.pdf. It does not have a transformer, but is an audiophile professional high quality power amplifier. Thanks.

[@saanjayray]

Nice one

[@buildaudioamps]

Thanks