You may return most new, unopened items within 7 days of delivery for a full refund. Economy Shipping: China Air Post Mail / Parcel, Hongkong Air Post Mail / Parcel, or shipment by sea etc For faster shipping and smooth transaction, we will change the shipping company among them C. Express Shipping: EMS, DHL, UPS, or Fedex, Special Route.,etc. Standard Shipping(≤2KG): The Post Registered Air Mail, USPS/ePacket, PostNL, Singapore Post, or DHL Global Mailī. There are two options for shippig as below.Ī. The shipping rate can be showed at the Checkout page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound. The weight of any such item can be found on its detail page. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.Ĥ.Please also note that the shipping rates for many items we sell are weight-based.
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. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.ģ. We can ship to virtually any address in the world. Your order address MUST MATCH your Shipping address. We only ship to confirmed order addresses. Buyers bear all responsibility for all extra charges incurred (if any).Ģ. If you buy the items, it means you accept the terms above.ġ.Important: Import duties, taxes and other customs related charges all are not included into shipping cost. We don't provide any technical support.Ģ. If you have enough capablities for circuit-reading, electronical components knowledge, assembling, soldering and problem-solving, you can buy them to enjoy DIY. We provide you some items and components for your DIY. Do not touch the tubes after the PCBA works, there is high hot.ġ. After testing for PCBA without vacuum tubes is ok and no abnormal, the tubes just can be fixed into the based.Ĥ. Input voltage to the terminal connected must be strictly follow the specification, it can not be wrong.ģ. Output transformer must connect speaker cabinets otherwise Output transformer will be burned if there is no load.Ģ. The holes of tubes fixed may be cut as PCB layout.ġ. If you want to buy them, please click the links.ĥ. Note: This 300B tube kits doesn’t contain the required five vacuum tubes and transformers (output transformers, power transformers) and chokes. Recommend specification of Choke Coil: 5-8H Recommend specification of power transformer:Ī) Primary impedance (kilohms): 3.5K (200mA) or 2.5K, it is made of taps with linearĥ. Recommend specification of power transformer:Ĥ. Components and parts included, refer to the BOMģ. Coupling capacitor used the best human voice French SCR Suren one tube bases of 300B are made of 95 ceramic base with special 24K gold-plate contacts, to ensure the PCBA achieving perfect performance, detailed see the BOM. High quality component and parts are used, all are new parts.
STEREO POWER AMPLIFIER KIT FREE
Circuit is free debugging, making simple.ĥ. PCB with 2.0mm thick high-quality immersion gold.Ĥ. Designed with tube 6SN7 + 300B single-ended output form, the most authentic classic 300B solution.Ģ. ( This 300B tube kits doesn’t contain the required five vacuum tubes, only PCBA as above photo shown) Featuresġ. Photo after fixed tubes (The last version below for you information only) The kits need be soldered and tested by buyer self, no including any tubes and Transformer.ġ.This version is the latest version (version 1.1) that increases the gain of the preamplifier stage and the sound field positioning is even better.Ģ.The resistance and capacitance of PCB parameters and schematics are slightly different.The standard parameters of PCB shall prevail.
Output transformers are made of high-grade silicon steel plate Z11, and used imported electronic vacuum tubes. And this 300B PCB material is 2.0 thick double copper immersions gold.
STEREO POWER AMPLIFIER KIT PLUS
Because the PCBA board is free testing, and its manufacturing difficulties is equal to assemble a LM1875 amplifierįramework of 300B tube amplifier kit adopts 6SN7 plus 300 B single-ended outputs. Now, there are well-made PCBA instead of scaffolding soldering, the problems above will be completely resolved, and it is not difficulties since then. 300B Tube Amplifier Kits Stereo Power Stage 6SN7 Preamp 5U4G Rectifier HIFI Audio DIY Model No: WHFT-A300B(NS)Ī lot of HIFI audiophiles like to do DIY 300B tube amplifier with scaffold-soldering way previously, but that is a great engineering and too much wiring, reliability and performance may be affected, also its appearance does not look good.
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