Modular stereo preamplifier JC-2 kit premium parts ultimate performance !

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$78.91
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  • Electronics

    Modular stereo preamplifier JC-2 kit premium parts ultimate performance !

    Note on 28 Feb 2016 : The shield cans are temporarily sold out. So we do not have option A and option B now. Instead, we offer 4 pairs of matched 2SK170BL/2SJ74BL with Idss >8.0mA as option C.

    Note on 26th Apr 2015 : From now on we will ship option B with 4 pairs of matched 2SK170BL/2SJ74BL with Idss >8.0mA. ( Operating current is ~6mA)

    This is an ultimate incarnation of the legendary preamplifier JC-2, taking a modular board approach.

    The projects consists of three boards. The main board contains the coupling, feedback components and DC power lines and features a monoblock structure.

    The two modules contain the broadband high current gain circuitry for left and right channel respectively.

    In our test , when incorporating with our Kubota power supply kit, the preamplifier gives a very refined , detailed sound, extended low end and big soundstage.

    On bench the circuit measured to have low distortion and boardband.


    This kits features the best components :

    1. non-magnetic Dale resistors ;

    2. Silver mica capacitors ;

    3. Highly reliable film capacitors ;

    4. Zetex high gain high current linear transistors;

    5. Elna Slimic II capacitors( replacing Cerafine with better performance) ;

    5. Toshiba matched JFETs ( as an option) ;

    6. Nice looking shield cans with laser etched fonts on the top of the shield can( as an option );

    PCB dimension : Main board - 178mm x 153mm. Module boards : 50mm x 52mm.

    PCB thickness : 2mm.

    Copper thickness : 75um ( 4 times normal thickness).

    Surface finishing : Double-sided solder resist for maximum reliability.

    Kit option :

    Standard Kit : All the components EXCEPT the JFETs, two shield cans and four coupling caps on the main board. The price listing is for the Standard kit.

    Option A : Two shield cans. Extra price for option A is US$20.00

    Option B : 4 pairs of matched JFETs + two shield cans. Extra price for option B on top of standard kit is US$88.00 .


    Option C : 4 pairs of matched JFETs. Extra price for option C on top of standard kit is US$78.00 .

    The four coupling caps are not included in this kit. Users can pick their favorite coupling capacitors.


    Operating voltage : DC input +/-18V 50mA per channel.

    This is a non-assembled kit. The assembled picture is for reference only.

    We provide schematic and part list to buyers by EMAIL.

    We do air shipping worldwide at US$8.00.


    Item Specifics
    Brand :Unbranded/Generic
    MPN :Does not apply
    UPC :Does not apply

    Payment

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    Modular stereo preamplifier JC-2 kit premium parts ultimate performance !

    Note on 28 Feb 2016 : The shield cans are temporarily sold out. So we do not have option A and option B now. Instead, we offer 4 pairs of matched 2SK170BL/2SJ74BL with Idss >8.0mA as option C.

    Note on 26th Apr 2015 : From now on we will ship option B with 4 pairs of matched 2SK170BL/2SJ74BL with Idss >8.0mA. ( Operating current is ~6mA)

    This is an ultimate incarnation of the legendary preamplifier JC-2, taking a modular board approach.

    The projects consists of three boards. The main board contains the coupling, feedback components and DC power lines and features a monoblock structure.

    The two modules contain the broadband high current gain circuitry for left and right channel respectively.

    In our test , when incorporating with our Kubota power supply kit, the preamplifier gives a very refined , detailed sound, extended low end and big soundstage.

    On bench the circuit measured to have low distortion and boardband.


    This kits features the best components :

    1. non-magnetic Dale resistors ;

    2. Silver mica capacitors ;

    3. Highly reliable film capacitors ;

    4. Zetex high gain high current linear transistors;

    5. Elna Slimic II capacitors( replacing Cerafine with better performance) ;

    5. Toshiba matched JFETs ( as an option) ;

    6. Nice looking shield cans with laser etched fonts on the top of the shield can( as an option );

    PCB dimension : Main board - 178mm x 153mm. Module boards : 50mm x 52mm.

    PCB thickness : 2mm.

    Copper thickness : 75um ( 4 times normal thickness).

    Surface finishing : Double-sided solder resist for maximum reliability.

    Kit option :

    Standard Kit : All the components EXCEPT the JFETs, two shield cans and four coupling caps on the main board. The price listing is for the Standard kit.

    Option A : Two shield cans. Extra price for option A is US$20.00

    Option B : 4 pairs of matched JFETs + two shield cans. Extra price for option B on top of standard kit is US$88.00 .


    Option C : 4 pairs of matched JFETs. Extra price for option C on top of standard kit is US$78.00 .

    The four coupling caps are not included in this kit. Users can pick their favorite coupling capacitors.


    Operating voltage : DC input +/-18V 50mA per channel.

    This is a non-assembled kit. The assembled picture is for reference only.

    We provide schematic and part list to buyers by EMAIL.

    We do air shipping worldwide at US$8.00.


    Item Specifics
    Brand :Unbranded/Generic
    MPN :Does not apply
    UPC :Does not apply