$5.01 Buy It Now or Best Offer
free,30-Day Returns
Seller Store dy-laser
(467) 100%,
Location: Wu Han
Ships to: US,
Item: 395547305538
Return postage will be paid by:Buyer
Returns Accepted:Returns Accepted
After receiving the item, your buyer should cancel the purchase within:30 days
Return policy details:
Supported Modes:—
Receiver Combo Features:—
MPN:Does Not Apply
Year Manufactured:—
Surround Sound Formats:—
Audio Outputs:—
Number of Outputs:1
Colour:Yellow
Amplifier Class:—
Mofi:Mofi
Type:Power Amplifier
Unit Type:Unit
Audio Inputs:—
Number of Channels:1
Number of Inputs:1
L1-12AX7:L1-12AX7
Features:—
Country/Region of Manufacture:China
Unit Quantity:1
Power:—
L1.12AU7/12AX7-Tube Pre-Amplifie-PCB & KIT & Finished Board DIY KIT ProjectTo complete this project, high level knowledge of electronics and rich experience in terms of soldering and testing are required.Due to time zone and language communication restrictions, we can only provide limited technical support, and you need to solve problems by yourself. We do not provide information other than the product introduction page.Product configurationDIY kit: Contains the PCB and the components needed on the PCB, but does not include the power transformer and the electronic tube.Finished board: Based on the well-tested board on the standard version kit, we verified all key points’ voltage, and used the signal generator and oscilloscope for analog waveform double verification. We will not use this board for listening test.All finished pcbs are all carefully hand-soldered and fully tests, so the price is higher and less cost performance. Price-sensitive consumers but with have DIY ability are recommended to choose the kit.Schematic & key point of debuggingPCB comes with component parameters for easy installation.We only refer the schematic of the amplification part of the circuit. If you need full circuit parameter, please read the component value with the PCB by yourself; we do not provide additionally.please keep test point voltage close enough to it, +-20% is also permitted.DIY KIT InstructionsSince the PCB holes are plated through, you only need to solder the parts from the bottom of the board. Do not drill or enlarge the holes because that would damage the through-plating.Clean both sides of the blank PCB with paper towel and isopropyl alcohol or electronics flux remover, then solder the components to the board, starting with the lowest profile parts. Make sure the correct part goes into each position on the circuit board. Measure each resistor with your multimeter to ensure it’s the proper value.Pay attention to the polarity of electrolytic capacitors, diodes, , transistors as well as the orientation.Clean up the solder flux residue from the board with isopropyl alcohol (or electronics flux remover) and a brush.Inspect all solder connections carefully, using a magnifying glass, to make sure there are no solder bridges or cold solder joints. Use a multimeter in ohms scale to check for short circuits.Since each LT1085/LM317T’s mounting tab is internally connected to the pin2, it will carry live voltages and should not be shorted to the chassis, ground or other parts of the circuit.Parts list 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.
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