Description: Note: this is assembled preamp board. ( not include tubes) PCB size: 102*177*1.6MM This is a stereo preamp board. works voltage: AC30-0-AC30V >=25mA Filament voltage 0-AC9V >= 1A The tube can use: 6DJ8, 6922, 6H30P 6N11. The signal is buffered 1:1, ( no gain) (noe: the defalut are not include these tubes) Distortion: 0.008% (10Hz ~ 100KHz) Frequency response: 10Hz ~ 100KHz (±0.2db) PRT-09A tube buffer - base on the Classic Musical Fidelity X-10D circuit. (high-end version) The Musical Fidelity X-10D is a buffer. The early design was mainly used to eliminate the "Digital taste" that produced by CD.to make the sound more close LP style. Highlights: 1: PRT-09A uses a better parallel Class A regulated power supply 2: The LT1085 regulator is used to supply power for the two tubes , which avoids the failure of the internal resistance of the filament due to the different internal resistance of the filament. 3: Use VISHAY glossy glass-sealed rectifier 4: The main filter capacitor is Nikko KZ 1000uF 5: Transistor for power supply, Toshiba A970-C2240, A1358-C3421 6: Coupling capacitor adopts ERO series This amp board will adjust and test well before shipping out. connect power transformer and install tubes will can works. Suitable Power transformer link: https://www.ebay.com/itm/325307007811 On Aug 16, 2022 at 07:27:07 PDT, seller added the following information:
Price: 50 USD
Location: Guangzhou
End Time: 2023-09-16T14:22:19.000Z
Shipping Cost: 8.5 USD
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Item Specifics
Return shipping will be paid by: Buyer
All returns accepted: Returns Accepted
Item must be returned within: 30 Days
Refund will be given as: Money back or replacement (buyer's choice)
Return policy details:
Country/Region of Manufacture: China
Compatible Brand: Universal
Model: Universal
Type: Circuit board
MPN: Does not apply
Brand: ZERO-ZONE
