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Phono 3C Phono Preamplifier 

User’s Manual 

 

Revised June 22/15 

 

 

Mapletree Audio Design 

Lloyd Peppard 

R. R. 1, Seeley's Bay, Ontario, Canada, K0H 2N0 

(613) 387-3830 

hollowstate.netfirms.com 

[email protected]

 

 

© Copyright Lloyd Peppard 2013-15 

12SN7

12SC7
   (R)

12SC7
    (L)

Содержание Phono 3C

Страница 1: ...User s Manual Revised June 22 15 Mapletree Audio Design Lloyd Peppard R R 1 Seeley s Bay Ontario Canada K0H 2N0 613 387 3830 hollowstate netfirms com info mapletreeaudio com Copyright Lloyd Peppard 20...

Страница 2: ...7 octal tubes known for low distortion and musicality Low output impedance 2 5K RIAA equalization within 0 5 dB 20 Hz 20000 Hz Use of polypropylene film signal coupling capacitors 40 dB gain suitable...

Страница 3: ...hen sharing a PS 2C power supply with a Line 2C preamp Separate user instructions are provided for this operation which are not needed if you are using the PSX power supply CAUTION Do not operate a po...

Страница 4: ...supply Power cutoff switch normally left in ON position RCA jacks are provided for two stereo phono inputs selectable using the toggle switch located between them and one stereo output The same groun...

Страница 5: ...d to Line 2B Output impedance 1 kHz 2 5 k Input impedance 47 k for both inputs Hum and noise at output less than 2 mV rms Phase inverting Power requirements 30 W 12 VDC 0 6 A 200 VDC 10 mA Phono 3 Equ...

Страница 6: ...0p 22 1K 5 1K 2W 12SC7 12SC7 100u 400V 332K 1 12SC7 3 2 4 1 5u 400V R Phono inputs R Output 1 0 1u 400V 432K 1 3 3M 1 221K 1 6 1 432K 1 1M 1 820p 4 3 3M 1 12n 7 8n 7 8n 47 5K 1 Gnd Gnd Bus Gnd Bus 100...

Страница 7: ...VAC 115 VAC Power 120AC 60 Hz Power Out rear view MUR180 330K 1W 10000 25 100 V 6 A 2 2K LED 115 VAC Mapletree Audio Design Preamplifier Power Supply PSX Copyright Lloyd Peppard 2012 15 Rev June 22 20...

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