We are speaking of quality or price? BTW could you buy not boutique like Russian FT's easy to get in ebay or ask Marko for 15$00 USD each Surplus USA Film Capacitors Teflon Polycarbonate Polyester Polypropylene
Yeah but its not like you need 20, just get a good mica or teflon, hell get 10, you will use them all eventualy.
Yes Felipe I agree, that will be the next step. Have build a couple of Salas's LV Shunt regulators circuits in the past for sensitive non-audio projects.
Any serious audio diyer wants the best within a budget and will never compromise quality (if I can't afford it, I'l wait until I can) - my motto: "Do it properly, or go home"
Wonder if any of you noticed that the input stage of the B&O is biased roughly 600 - 700mV above ground and removing C1 significantly compromises input stage operating point if the cartridge DCR is low, in fact if it is very low it will be completely cut off. This is also not to mention several uA of current now flowing through the cartridge coils.
Would be far better to just find a better quality capacitor for C1. Also R1 is there to improve resistance to EMI, and finally a pot for loading in a very low signal level application could be a recipe for distortion - once you find the right value you should replace it with the closest standard value resistor.
Would be far better to just find a better quality capacitor for C1. Also R1 is there to improve resistance to EMI, and finally a pot for loading in a very low signal level application could be a recipe for distortion - once you find the right value you should replace it with the closest standard value resistor.
Very valid points kevinkr. I fully agree. a pot is a source of unwanted noise - already fitted fixed value (47k - sounded best). I will investigate with o/scope - I must admit that without C1 in the circuit it sounds much better, however I will play with different types of capacitors in C1's position just to be on the safe side.
I think it's high time for me to start simulation on LT Spice - might save some time finding the optimum mods.
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