DAC AD1865 coupling transformer SRPP output Kit AD1865-1.0S NOS audio decoder
Chipset:
Data reception demodulation using 26C32 + CS8414, DA conversion using AD1865-NK, the NOS application .
Power:
1) Used two regulation stages for the data reception and demodulation, parts of FET and a precision reference voltage IC for first regulator, the second regulated stage with a low resistance voltage regulator IC, CS8414 were two groups of independent secondary regulation.
2) DA AD1865 chip, used two regulation stage by MOSFET and Darlington regulator for 2nd stage regulation.
Analog circuits:
Use audio coupling transformer + tube SRPP circuit.
Sealed with oil vintage audio transformers for preamplifier (which can effectively isolate the digital clutter) of analog signals output from AD1865, the audio signal through the audio transformer step-up circuit for smoothing after the SRPP amplification.
Remark: A pair of coupling transformer is “USED” parts from RCA Analog power supply: Use fast recovery rectifiers, the filament resistance by Linear Technology LT1084 regulator IC for ultra-low DC power supply. Components: U.S. military grade DALE precision resistors for filament regulation power stage, U.S. production of AB carbon resistors from U.S. for high voltage and the analog amplifying section. SRPP tube with 6N11, tube can be replaced by 6DJ8, 6922, E88CC, 7308, EIPCC88, 6H23, etc., directly Power Source: Digital section : 0-9V*2 Analog section : 0-9V*1 & 0-250V*1 Board Size : 185mm x 250mm You are welcome to ask if you have any question on the assembly and more information. May not be reproduced without consent ! SHIPPING: Registered parcel : USD26.00 International Buyers – Please Note:
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