Description

PLEASE, READ CAREFULLY EVERYTHING. IT IS IMPORTANT. About item : The GU-5B is a powerful generator triode in glass-to-metal design with a directly heated tungsten thoriated carbide cathode and forced air cooling. Designed to generate and amplify high-frequency oscillations at frequencies up to 110 MHz with an output power of at least 3.5 kW. Used for operation in radio transmitting devices and in industrial high-frequency heating installations. Working position – vertical, anode down. Forced air cooling: – anode – not less than 400 m3/h; – cylinder – not less than 40 m3/h. GU – a letter that determines the type of tube: GU – generator tubes with a generation frequency of 30 to 300 MHz; 5 – the number of the serial number of the development of this type of tube; B – letter indicating the type of forced cooling: B – air. Technical specifications: (at Un=12 V, Ua=3 kV, Ia=0.4 A). Filament current: 23 A. Grid current reverse: no more than 20 μA. Cathode emission current: (at Uа=Uс=500 V) at least 6 A. Ionic anode current: (at Ua=500 V) no more than 40 μA. Anode current: (at Uс=0 V) 0.55 ± 10A. Slope: 15 ± 3 mA/V. Gain: (at Ia=0.5 A, Ua=2 and 4 kV) 72.5 ± 12.5. Output power: (at 25 MHz) not less than 3.5 kW. Service life not less than 1500 h. Weight: 2.400 kg. PLEASE, READ CAREFULLY! SHIPPING METHODS: 1. Europe - Economy International Shipping - no tracking number. If you wish faster delivery and tracking number, please select STANDARD International Shipping. 2. Worldwide - Standard International Shipping - with tracking number included in the cost of shipping. 3. Any order above $ 60 US - with tracking number included in the cost of shipping. The ESTIMATED delivery time varies from 7 to 45 working days (9 weeks) to most of the countries. Detailed info you can find in the table below. Delivery time % of shipments that arrive in the said delivery time Country working days (without holidays and weekends) <15 15-24 25-34 35-45 >45 <3 weeks 5 weeks 7 weeks 9 weeks >9 weeks Canada, United States 5 % 85 % 7 % 3 % 0 % Africa, South America 5 % 20 % 55 % 20 % 0 % Japan, South Korea 10 % 85 % 5 % 0 % 0 % Taiwan, Thailand 5 % 45 % 45 % 5 % 0 % China, India 5 % 40 % 50 % 5 % 0 % Indonesia, New Zealand 5 % 40 % 50 % 5 % 0 % Israel 5 % 65 % 30 % 0 % 0 % Australia 5 % 55 % 35 % 5 % 0 % Russia 5 % 50 % 40 % 5 % 0 % Europe 60 % 35 % 5 % 0 % 0 % Others, not entered shall, countries 5 % 20 % 55 % 20 % 0 % Items are generally shipped out within 24 (rarely 48) hours after payment has been confirmed (Holidays, Sat. & Sun. excluded). The delivery time depends on the destination, holidays, customs clearance factor and other factors. Please , if you have a problem , DO NOT OPEN CASE on eBay before this period has elapsed or before you communicate with us. We ship your package to your eBay address. Please update your complete address including full name and phone number during checkout. We are not responsible for any wrong or undeliverable address. INTERNATIONAL BUYERS – PLEASE NOTE: Import duties, taxes and charges are not included in the item price or shipping charges. These charges are the buyer’s responsibility. Please check with your country’s customs office to determine what these additional costs will be prior to bidding/buying. ADDITIONAL INFORMATION & QUESTIONS: The pictures are for general information only . They do not carry technical information . I apply maximum efforts to work better and better. It is very important for me to get your feedback to know, whether you are really satisfied completely! Please, contact us if you have questions - especislly in the delivery term. Please use the link "Ask seller a question". GUARANTEES & a POLICY of RETURN: We guarantee you complete satisfaction with all our products. If you receive an item you ordered damaged or defective, we will send replacement item. We only accept returns if the items in original package you have received are not what was described in the auction, damaged or defective. If exchange is not possible money refund will be issued. All returns must be sent to Bulgaria. Item for returning must have the original tags and packing, otherwise it won't be accepted. Thanks And Good Luck! 103077_1**