VU Meter dB Level Meter 300B Tube Amplifier dB Header Tube amp No Including Driver Board
Product Specifications
1. Measuring range: 0--500UA ± 10%
2. Inner resistance: 650Ω ± 10%
3. Accuracy: ± 5%
4. Approved Location: full scale 500UA
5. Bulb Voltage: AC DC6-12V
6. Dimension
To extend the life of the backlight bulbs， you can use the following methods:
1. In the backlight brightness to meet the requirements under the conditions of lower operating voltage， it can significantly prolong life.
2. AC power supply 10 ~ 12V， 10 ohms to 50 ohms in series limiting resistor， reducing the impact on the filament boot.
3. The following diagram is the effect AC 10V.
The Effect for Fixing on 300B Tube Amplifier
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 don`t 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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