Hello. I'm trying to build my own phono preamplifier, and i found some schemes over the net. I'm interested in this one, but i have a question about the grounding solution adopted in the circuit. I posted two images with the scheme and the power supply (the bridge part). I'm working on the PCB now, and i will posted when i'm finished designing it .. until then i'm waiting for opinions about the scheme. cheers.
P.s. I was also thinking of replacing njm2068d with tl 071. What do you think ?
P.s. I was also thinking of replacing njm2068d with tl 071. What do you think ?
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Both capacitors in pics are for grounding of the case (enclosure) and the first one is connected to the ground terminal of 230V c.a. sector .Hello. I'm trying to build my own phono preamplifier, and i found some schemes over the net. I'm interested in this one, but i have a question about the grounding solution adopted in the circuit. I posted two images with the scheme and the power supply (the bridge part). I'm working on the PCB now, and i will posted when i'm finished designing it .. until then i'm waiting for opinions about the scheme. cheers.
P.s. I was also thinking of replacing njm2068d with tl 071. What do you think ?
TL071 have bigger slew rate and lower noise than njm so it is ok .
thanks a lot i suppose it's something like a loop circuit breaker .. http://sound.westhost.com/earthing.htm
also what does the LC combination on the stage input does ?? i think it's a low pass filter, but for what ?
also what does the LC combination on the stage input does ?? i think it's a low pass filter, but for what ?
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