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Break in phono with a cd player
Break in phono with a cd player
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Old 24th March 2020, 12:51 PM   #41
lcsaszar is offline lcsaszar  Hungary
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Quote:
Originally Posted by rayma View Post
That would mostly be bass input to the phono preamp. You have to inverse RIAA a line signal
to get a proper spectral balance for a phono preamp burn-in.
I recommend to write a CD with white noise signal. Its spectrum will resemble to a RIAA pre-emhasized pink noise, which in turn closely resembles to a general real music content. Then play it in repeat mode through a 100:1 resistive divider.
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Old 24th March 2020, 02:50 PM   #42
diyrayk is offline diyrayk  United States
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If you accept the premise that electronics parts have properties that can be 'broken-in' with an audio signal, then you must also accept the corollary premise that these same parts can be 'worn-out' with too much audio. I'm already past the 'worn-out' stage with too much reading of this thread.

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Old 24th March 2020, 02:55 PM   #43
KatieandDad is offline KatieandDad  United Kingdom
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Quote:
Originally Posted by rayma View Post
That would mostly be bass input to the phono preamp. You have to inverse RIAA a line signal
to get a proper spectral balance for a phono preamp burn-in.
That would imply that you can burn in amplifier to a particular type of music.
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Old 24th March 2020, 04:14 PM   #44
stocktrader200 is offline stocktrader200  Canada
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220k resistor to the input from CD with cartridge attached works ok
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Old 24th March 2020, 04:15 PM   #45
mickeymoose is offline mickeymoose  Canada
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Thank you all for a bit of hilarity in these dark times! E
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Old 24th March 2020, 07:55 PM   #46
Mark Tillotson is online now Mark Tillotson
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Doh! I knew we'd forgotten something obvious

I suppose the point is you don't want to wear the records out.

Since capacitors used for this sort of circuit don't need breaking in, yes, play the records.
However you can run some tests on a preamp via an inverse RIAA, such as distortion and frequency response measurements, before adding in the extra complication of vinyl and its imperfections.

There's also the very valid reason that you can check for thermal issues running the amp for prolonged periods while measuring/listening.
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