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Item description

Assembled Ultimate Preamplifier board With three input
 
This is assembled board and tested well.
 
Features:
  • PCB use Double-sided Immersion Gold Process
  • the main capacitor is SIC capacitors disassemble(Used)  , sound very natural moisturizing
  • MOSFET Class A power supply,decoupling capacitors is France SIC,which ensure a very good power characteristics
  • The output stage use British famous transistor ZTX450 550 Class A output
  • three input selector function
  • 2SJ104 discontinued,so 2SJ104 is genuine disassemble(Used).
PCB size: 155MMX136MM

Transformer input voltage "AC14V×2 to AC18V×2
 
Test:

1.All the components installed first, ZTX450 550 geminate transistors temporarily not install, adjust power 1K adjustable, make the SIC330U Capacitance voltage on both ends of 15V-16V.

2.After install ZTX450 550 geminate transistors,adjust 200ohm adjustable resistor,510ohm resistor both ends of the voltage is about 1-1.2V, so the input stage current is about stabilized at 2MA. Adjust 1K adjustable resistance, make the output midpoint (OUT) near 0MV, input current estimate at this time a little change, repeatedly adjust this two adjustable resistor can be achieved the budget value.
 
 
Packing list:
1PC assembled board
 
If you want the finished product,PLS Click: Link


For matching chassis,pls Click: Link
 

  • Paypal Only --Buyer must pay using PAYPAL  within 7 days from the date of transaction made.

  • Full Payment --Transaction with insufficient payment will not be handled. So, please make you complete the full payment, including Final price + Postage.

  • No Discount --No discount is offered for all transactions.

  • Processing --We will arrange the dispatch within two working days after we receive the valid and completed payment.

  • Note:We are not responsible for any customs duties fee and any additional charges
  • Please send us your correct personal details and your requirments via Ebay when you payment (like contact person,telephone number, correct address,input voltage, color, etc..)
  • Shipping cost includes postage, packaging, and handling fee which are in agreement with eBay's rules. If you have any disagreement, please read eBay's rules regarding shipping cost carefully. We don't add a surcharge on shipping thus the shipping charge is firm and non-negotiable.
  • Shipping methods: item will be shipped within 2 working days upon receipt of FULL payment. It is noted that PayPal pending payment (such as eCheck) may take up to 5 working days to clear. We use air mail (18-28 days to most countries), or expedited service such as EMS or DHL (5-10 days to most countries).
  • No Combined Shipment: Combine shipping is not available since AIRMAIL POST charges the postage based on weight rather than number of boxes.
  • Customs Clearance
We are NOT responsible for any import tax, customs fees or customs delay.

Buyer cannot request cancellation of the auction or request for refund under this situation.

Please check with your local tax or import authorities BEFORE bidding.

Terms of Sales

We offer 1-year manufacturer warranty (some exclusions may apply).

  • In In case of “dead on arrival” (DOA), please notify us immediately within 3 business days and return the case within 7 days after receiving the items. (The postmark date is applicable.). All of our items were inspected before shipping. We provide technical support via email. If the problem cannot be resolved and return is determined to be the best solution, after receiving the items in original condition, you may have a replacement or refund as soon as we cancel the order on eBay. If it is any reason other than product defect, shipping cost is non-refundable.
  • If the item was sent back for repair during the first 30 days, return shipping cost is the buyer’s responsibility. We pay the 2nd shipping cost & handling.
  • A fter the 30 days, if you ask for replacement or repair, you need to pay for the 2nd shipping cost & handling.
  • If you return the item for reasons other than product defect or shipping damage, you will pay a 20 % restocking fee.

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