tube pre-amp board is the circuit schematic design imitation crew Music fax X-10D,to be rational optimization,more stable performance than the original machine,tube play 10% increase. This board uses a single 12V AC input,the circuit processing provides 6J1 tube needed positive and negative voltage and filament power supply voltage.
Important Note: This kits consists of brand new modules that were tested by the manufacturer themselves. We will no longer test them again for you. This is for the simple reason of testing each and everyone of them will take an enormous amount of time (because of the number of modules involved), and the cost of testing will easily exceed the price of the kit itself. Hence, to keep the price low, this set is sold in AS IS WHERE IS BASIS. Please do not hesitate to contact us if you have any question about this product.