Bile Preamp-PRT10A Tube Preamp Amplifier-PCB & DIY KIT & Finished Board
$ 7.48
Description
Bile Preamp-PRT10A Tube Preamp Amplifier-PCB & DIY KIT & Finished Board Description: PCB size: 155*177*1.6MM FR4 Class A plate PRT10A preamplifier reference - Hetian Mao's bile preamplifier, Hetian Mao's can be said to be a perfect version of Marantz 7 before the gallbladder, adding SRPP on the third level to reduce the cathode burden. The Hetian Ma's bile preamplifier uses two-stage common-stage cathode amplification, and the output stage uses the SRPP method. However, the SRPP method is different in that there is no cathode resistance between the cathode of the upper tube and the anode of the lower tube. . Unlike the general voltage amplification, the SRPP output stage of the third stage does not have any voltage amplification. It is only used as a buffer stage to reduce the output impedance and increase the output current, but it can drive the load more than a normal cathode output. The overall dynamic and high-frequency response is slightly better than the M-7, and its analytical power and signal-to-noise ratio are high. The PRT10A is designed to be faithful to the original amplifier circuit parameters without any adjustments; our updated parts are larger than the power supply: The high-voltage power supply uses a regulated power supply, and the MOS tube is used as a voltage regulating tube to make it more daring. The filament enters and doubles two sets of voltage regulators, respectively supplying power to the left and right channel tubes. In the PRT10A, we added a 30-second delay-on output component that has reduced the squeaky sound of the pre-biliary pre-boot. In terms of ingredients, the company used 1% metal film resistors, silver-plated ceramic tube holders, Hitachi capacitors, chemical capacitors, etc. High-voltage regulators were selected from Toshiba tubes and coupling capacitors for Sibi+MKP series. Value for money. If the player grinds the machine, it only needs to be changed two places: The priority is the tube, it is recommended to use the imported tube The secondary is to replace the coupling capacitor on the PCB with this higher-level brand (Lee likes to use MCAP Mondov) Input voltage requirements: 220V&0.05A 14V&0.8A The above current is the minimum current requirement. This version requires 4 12AT7 (preferred) followed by 12AU7, 12AX7 because the magnification is too high and is not suitable for use. This shop has matching transformers for sale. Shippment: 1.Every parcel will be registered with tracking number. 2.International shipping requires complicated shipping procedures (such as both countries customs, transit stations etc.), also will be affected by many factors, such as holidays, weather conditions et. If the transportation time is not normal, please contact us.
