6K4 is a parathermal oxide cathode remote cut-off pentode with 7 pins
Main application: high frequency or intermediate frequency voltage amplification.
1.Filament voltage: 6.3V current 0.3A
2. Screen voltage: 230V current 10mA
3.Second gate voltage: 100V current 5.5mA
4. Transconductance: 4.4
1. Worldwide Shipping (Except some countries).
2. Orders processed timely within 3~5 business days after the payment verification.
3. We only ship to confirmed order addresses. Your order address MUST MATCH your Shipping address.
4. The images shown are not the actual item and are for your reference only.
5. SERVICE TRANSIT TIME is provided by the carrier and excludes weekends and holidays. Transit times may vary, particularly during the holiday season
6. We supply 4 kinds of shipping services as below
A. Expedited Shipping: DHL, UPS or Fedex. For faster shipping and smooth transaction, we will change the shipping company among them. Estimated Delivery Time: 3~7days
B. Standard Shipping: EMS, eParket (US available) or DHL Global Mail (Germany available only) Estimated Delivery Time: 3~7days
C. Economy Shipping: China Air Post Mail / Parcel, Hongkong Air Post Mail / Parcel, Sweden Post, etc.Estimated Delivery Time: 15~60days
D. Special Routes: Russian Special Route, Estimated Delivery Time: 30~ 40days;
Australian Special Route, Estimated Delivery Time: 10~ 15days;
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).
We will check the item carefully and make sure the quality before shipment. If some unexpected problems happened, please contact us firstly.If it is quality problem, buyer may submit argue within 7days after receiving the item, buyer must provide photos , video and other evidences to seller for identify. Man-made damaged, buyers take full responsibility.
1) .The buyer return us the goods and responsible for return shipping costs; after we receive the goods ,we will send a new product to buyer and pay for the resend shipping cost.
2) .If the goods (total price including shipping is less than 10USD) has quality problems, we will resend a new product in buyer next order; if buyer dont plan to make a new order in the near term, buyer can pay the resend shipping cost and ask to resend a new product.
3). Due to the taxes problem, buyer refuse to receive the goods, buyer need to be Responsible for freight out and home.
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 aliexpress.
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