Hello !
I have a Diy MM phono preamp that I want to use a cd player to break it in. Hopfully I can put a cd on repeat and let it play for som days, before start to listen to it With my turntable.
I under stand that this is posible with a resistor on the cable, buth dont know the value in ohm. Do anybody have eksperience With this ?
Regards
I have a Diy MM phono preamp that I want to use a cd player to break it in. Hopfully I can put a cd on repeat and let it play for som days, before start to listen to it With my turntable.
I under stand that this is posible with a resistor on the cable, buth dont know the value in ohm. Do anybody have eksperience With this ?
Regards
I have a Diy MM phono preamp that I want to use a cd player to break it in.
You would best use an inverse RIAA equalizer between the CD player and the phono input.
This would give a normal signal spectrum to the phono input.
Reverse RIAA
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What?Capacitors are mechanical devices
It depends what you mean by "break in". Some circuits perform on spec when they have warmed up, including your earsHello scottjolin !
I can not fully agree about that, as I have eksperiensed that cd, amplifier, preamplifier and cable have sounded bether after playing som hours.
I only need the in signal to be simular mv from cd as from a MM pick up
The inverse RIAA circuit does exactly that.
If you just want to use resistors, then you could use a series 100k and a shunt 1k,
though this will not work as well as the inverse RIAA circuit.
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Capacitors are mechanical devices, they break-in.
dave
Then you need to mechanically break them in, this nonsense is an insult to the intelligence of most here.
Re capacitors, read these articles for a more nuanced approach to real-world capacitors and their imperfections, including changes with time under bias. Cyril Bateman's Capacitor Sound articles | Linear Audio NL
(and no, they don't need burning in)
My inverse-RIAA circuit I stuck in a little diecast box:
888k = 820k + 68k
3.7nF = 2.2nF || 1.5nF
600 ohm = 1k2 || 1k2
Can't remember the attenuation factor, I forgot to write it on the box! It definitely worked reasonably well with playing music and test tones through my RIAA preamp designs, not that I claim its hugely accurate.
(and no, they don't need burning in)
My inverse-RIAA circuit I stuck in a little diecast box:
888k = 820k + 68k
3.7nF = 2.2nF || 1.5nF
600 ohm = 1k2 || 1k2
Can't remember the attenuation factor, I forgot to write it on the box! It definitely worked reasonably well with playing music and test tones through my RIAA preamp designs, not that I claim its hugely accurate.
They were 'semi-mechanical' devices when large sheets of metal were suspended by insulators at a time when Marconi was attempting trans-Atlantic radio transmission. Are they still being used in modern electronics?Capacitors are mechanical devices, they break-in.
dave
That is your brain 'breaking in' and has nothing to do with the components.I can not fully agree about that, as I have eksperiensed that cd, amplifier, preamplifier and cable have sounded bether after playing som hours.
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