45 In stock
Finished PCBA Amplifier Board
Tube Preamplifier Kit Finished PCBA Board Kondo-M76X4/EZ90 12AY7 / 6072WA No Including Tubes Tansforemer HIFI Audio DIY
Model No: WHFTA-PAM7
The circuit diagram of this PCBA finished board sources from kondo ksl-m77 that is worth 80 thousand , and soldered HIFI resistance koa precision one(Koa is kondo (audionote), which used in M7 original unit), Riken and other antiques resistance.
The video demo is only for you information below.
The commodity doesn't include tubes, transformers. Photo as below showed is finished PCBA board after soldering and testing for sold.
The current version
These are two options
1. DIY Kit Only Version
2. Finished Board
1. PCB size: 225mm x 250mm, wherein the power plate width 75MM
2. Requirements of secondary voltage of power transformer is:
a) AC 230-0-230Vgroup x 1 , current is greater than 50mA;
b) AC12.6V x 1, current greater than 3A,
c) AC 6.3V group x 1, current greater than 2A,
3. Tube model requirements (THIS KIT don’t include any tubes)
a) 6X4 / EZ90 x 1
b) 12AY7 / 6072WA x 4. (12ay7 emergency alternative models 12AT7,12AX7,5751)
4. Circuit Diagram
1. Different batches of product grades with same quality level has small differences for the appearance, without prior exchange photos.
2. Because the given the pcb board can scan copy and affect the secondary sales after soldering, it shall not be accepted to return after sold, we only accept maintenance agreement after sold.
3. When buying the item, it means the buyer agree this statement above as default.
The photos are below for the last version just for you information.
Photos by Audiophiles DIY
Effect by Fixed Tubes and Lighting
Original Unit's Photos For Information
1.Important: Import duties, taxes and other customs related charges all are not included into shipping cost . Buyers bear all responsibility for all extra charges incurred (if any).
2. We only ship to confirmed order addresses. Your order address MUST MATCH your Shipping address. We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
3. When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
4.Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound. The shipping rate can be showed at the Checkout page. There are two options for shippig as below.
A. Standard Shipping(≤2KG): The Post Registered Air Mail, USPS/ePacket, PostNL, Singapore Post, or DHL Global Mail
B. Express Shipping: EMS, DHL, UPS , or Fedex, Special Route.,etc. For faster shipping and smooth transaction, we will change the shipping company among themC. Economy Shipping: China Air Post Mail / Parcel, Hongkong Air Post Mail / Parcel, or shipment by sea etc
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the 'Complete Orders' link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
1. One year Manufacturer`s limited Warranty for defective items (excluding items damaged and/or misused after receipt). Accessories come with a 3-month warranty.2. Defective items MUST BE reported and returned within the warranty period (with the original packaging, if possible). You must tell us what the defect is and give us your order number. WE DO NOT REPAIR OR REPLACE ITEMS WITH AN EXPIRED WARRANTY. You agree to all of the above-listed policies upon ordering on our store.