20 In stock
IWISTAO Vacuum Tube Preamplifier Finished Board DIY kit CAT SL-1 Circuit Diagram
Model NO: WHF-PRATUBE-SL
The circuit is large dynamic, accurate in positioning, and mellow in the intermediate frequency. It can be called the most perfect design of the tube pre-amplifier.
1. Power supply voltage requirements:
1). High voltage can range from AC230V to 280,V and the current is greater than 50ma.
2). The filament voltage is 6.3v/2.5A.
2. Its magnification of the circuit is 15 times.
3. Tube configuration (not including any tubes)
1.In response to the requirement that some players may replace higher-level relays, the relays and selector switches of the sub-board are spare parts and are not shipped by welding.
2. we provide you some items and components for your DIY. If you have enough capabilities for circuit-reading, electronica components knowledge, assembling, soldering and problem-solving, you can buy them to enjoy DIY. If not, please don't buy them. We only provide limit technology support in this individual items itself.
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).
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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.
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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.