How to modify Aleph ONO to line stage preamp - diyAudio
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Old 7th January 2005, 03:53 PM   #1
aht is offline aht  Thailand
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Thumbs up How to modify Aleph ONO to line stage preamp

Now I succesfull in AlepH ONO with very high gain and got hum on output (RCA) about 0.5-0.8 millivolt from unload input .But I want (need) to modify benefit of it to line stage preamp (without riaa EQ same same Kaneda preamp & EQ) .Could anybody suggest me ?
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Old 11th January 2005, 12:19 AM   #2
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Of course, measuring the noise with the input open is not
the way you would do it.

I think if you tear out the moving coil stage and simply set the
feedback loop for about 20 dB without the equalization, it will
work fine - remember to remove the output cap to ground,
which is part of the EQ.
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Old 11th January 2005, 01:31 AM   #3
aht is offline aht  Thailand
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Unhappy I got some problem

After I change AV to 20dB it still higher gain more than Aleph P1.7
So I cancel 0.01uF, 0.033uF, 0.0027uF, 220uF*2, 0.047uF and connect 100 ohm to ground and calculate value of 7.32k+88.7k to new value is it correct ?

Thank you so much Mr.Nelson Pass. You're the most popular hifidelity designer in Thailand.

If somebody want to build Aleph ONO (MM Riaa & Supply only) can mail to me for a sample of it's PCB. (eagle files)
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