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Old 21st January 2013, 03:54 PM   #1
scafas is offline scafas  Italy
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Default pcb of pre phono indiscreto

i have some pcb of this great phono preamplifier for MM pickup.
sold for 13 usd (stereo version) with free ship.
ask me to scafas@tiscalinet.it
Click the image to open in full size.
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Old 21st January 2013, 04:08 PM   #2
scafas is offline scafas  Italy
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Default prototipe board

this the first prototipe board of phono preamplifier
Click the image to open in full size.

pcb-audio.com
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Old 30th January 2013, 10:49 AM   #3
scafas is offline scafas  Italy
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Quote:
Originally Posted by scafas View Post
i have some pcb of this great phono preamplifier for MM pickup.
sold for 13 usd (stereo version) with free ship.
ask me to scafas@tiscalinet.it
Click the image to open in full size.
or 7eu. escluse ship
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Old 30th January 2013, 11:50 AM   #4
oz7aff is offline oz7aff  Denmark
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Is it possible to see a schematic and a Bom ?
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Old 30th January 2013, 03:55 PM   #5
scafas is offline scafas  Italy
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Default schematic

Quote:
Originally Posted by oz7aff View Post
Is it possible to see a schematic and a Bom ?
the schemaic is here :
Click the image to open in full size.

and bom:
Click the image to open in full size.
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Old 30th January 2013, 07:01 PM   #6
oz7aff is offline oz7aff  Denmark
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BOM means Bill off Materials, also a list of the components that are used.

Is the transistors paired in any ways ?

Do you supply it with +27VDC and -9VDC ?
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Old 30th January 2013, 07:53 PM   #7
scafas is offline scafas  Italy
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[QUOTE=oz7aff;3349038]BOM means Bill off Materials, also a list of the components that are used.

Is the transistors paired in any ways ?

Do you supply it with +27VDC and -9VDC ?

[/QUOTE
yes , i supply it with +27_0_-9
ok , you can see in the original here:
inDiscreet Phono Pre-amplifier [English]
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Old 30th January 2013, 08:00 PM   #8
scafas is offline scafas  Italy
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Default 2n2222

i try also the 2n2222 instead bc109 and the preamplifier work very well .
I use a pair of lm317 in the psu to get +27v and -9v. from a separate secondary transformer.
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