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3) Circuit board adjustment trimmers placement.

END OF MANUAL

Copyright OnE Audio Projects 2016

www.oneaudio.net

[email protected]

The full thread describing project construction can be find on DIYaudio.com forum.

Bare printed circuit board with full project design folder are available for sale.

“Frex” member.

Others OnE Audio Designs :

ERMSDCV2

, DC-1MHz RMS voltmeter & 80dB 10Hz-100kHz Ultra low 

noise amplifier

.

EOSC10KV3

, ultra low THD 10kHz reference oscillator.

AA5381V1

, 24bits/192kHz stand alone high performance Analog

to Digital converter.

EHAMP08

, Remote controlled TPA6120 based headphone amplifier.

EXDAC

Symmetric outputs high performance audio DAC with 

headphone amplifier.

Page 8/8

Summary of Contents for EOSC10KV3

Page 1: ...3 Instrument operation 3 1 power supply requirements 3 2 Using outputs 3 3 Rear H2 trim output 4 4 First power up tests 4 5 Adjustment procedure 5 6 Technical specifications 6 1 General parameters 6 2...

Page 2: ...by the oscillator surpass all measurements equipments available from now THD measurement is only possible using techniques to remove fundamental and then amplifying THD products for further FFT measu...

Page 3: ...s LT1761 LT1964 default BOM values Maximum input voltage must never excess 20VDC If this voltage is excessed regulators will be damaged The standard adjustable regulators LM317 LM337 less expensive re...

Page 4: ...0V Connect it to EOSC10KV3 and switch it ON It is preferable that you could read current on both rails of the power supply when powering Now increase slowly the symmetric voltage and verify that input...

Page 5: ...and only if you can read H2 level with accurate setup I noted that H2 level could be reduced using lowest loop gain of RV3 So you could try after to turn very slowly RV3 clockwise to reduce gain and...

Page 6: ...ingle ended 0 5 4 Vrms Output amplitude adjustment range differential 1 4 Vrms Total harmonics distortion Vo 1 Vrms Rload 10 KOhms 130 0 000016 dBV Only for LT1761 LT1964 regulators otherwise 14 5V mi...

Page 7: ...al THD of the analyser So for this reason a 10 kHz passive notch filter is added between the EOSC10KV3 and the analyser input to avoid THD coming from the analyser itself The notch filter attenuation...

Page 8: ...with full project design folder are available for sale Frex member Others OnE Audio Designs ERMSDCV2 DC 1MHz RMS voltmeter 80dB 10Hz 100kHz Ultra low noise amplifier EOSC10KV3 ultra low THD 10kHz refe...

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