Thursday, 23 October 2014

JP200 Clone - my first audiophile valve project

Based on Jadis JP200 Valve Pre-amp with some modification 

   
Features:

Dual Mono and separate power supply chassis design.

2X EI type power transformers

2X separate tube based regulation circuit boards for B+ high voltage supply involving 2X EL84 and 2X EF86 tubes.

All filament supplies for the main channels are DC regulated and supplied to output and amplification stages separately in each channel.

3X carefully matched and balanced TungSol Gold Pin reissue 12AX7 tubes are used for each channels.

Coupling capacitors are Germany ‘s Mundorf supreme and US made Audio Cap’s RT grade.

All power filtration caps are Nichicon KX grade.

All resistors used in power and preamp sections are audiophile grade Japanese Kiwame 2W carbon film.

Volume is controlled by a ladder type attenuator with all Dale military grade resistors for precise volume control and balance.

Capable of feeding up to 4 sets of stereo signals selected via the professional Takamisawa signal replays

Output signals can be muted by the push switch in the front panel and is about 90 seconds time delayed when the preamp is switched on.




                                                                         

                                         
                                     
                                                                            
                                          
                                     

                                   
                                     
                                         
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