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Vacuum Tube FU-5 Shuguang Replace Replace 805 GL805 High Reliability Precise HIFI Audio
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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).
Vacuum Tube FU-5 805 Shuguang Replace GL805 High Reliability Precise HIFI Audio
Model No: FU-15
Vacuum tube FU-5 (805) is a direct-heated thorium-tungsten cathode triode, it can be used for class B, A-F, R-F power amplification, class C R-F power amplification and high-frequency oscillation.
FU-15(805) is similar to GL-805 and can be used interchangeably.
Filament heating
Uf ……………………10 V
If………………………… 3.25 A
Interelectrode capacitance
Input capacitance……………………8.5 PF
Output capacitance……………………10.5 PF
Trans-circuit capacitance……………………6.5 PF
Limit rating
Anode voltage……………………1500 V
Anode dissipation power………………125 W
Operating frequency and anode voltage
When the working frequency is above 30MC, the anode voltage and anode input power will be adjusted down according to the following table in due course:
Frequency (MC) Anode voltage and anode input power
B pole electrode C class telephone anode modulation telegraph
30 100% 100%
45 90% 82%
80 71% 55%
Recommended working status (reference value)
Class B A-F power amplifier (two tubes) limit value
Ua……………………1250 1500 1500 V
Ia(max.sig.per tube)……………210 mA
Pa(in)(max.sig.per tube) z……315 W
Pa (per tube) …………………… 125 W
Ug………………………………16 V
üg(pk)……………………235 280 V
Ia(0)……………………148 84 mA
Ia(max.sig)……………500 600 mA
Pd……………………6 7 W
RL(a-a)……………………6.7 8.2 kΩ
Pout(max.sig)…………300 370 W
Class B R-F power amplifier
(The maximum modulation coefficient of each tube is 1.0 under the carrier condition)
Limit value
Ua………………1250 1500 1500 V
Ug…………………………-10 V
Ia………………135 115 150 mA
Pa(in)………………………………185 W
üg(pk)…………70 70 V
Ig………………15 15 mA
Pd………………11 7.5 W
Pout………………55 57.5 W
Class C R-F power amplification and oscillation (anode modulation)
(The maximum modulation coefficient of each tube is 1.0 under the carrier condition)
Limit value
Ua………………1000 1250 1250 V
Ug………………-155 -160 -500 V
Ia………………160 160 175 mA
Ig………………60 60 70 mA
Pa(in)………………………………220 W
Pa………………………………85 W
üg(pk)…………295 300 V
Pd………………16 16 W
Pout………………110 140 W
Class C R-F power amplification and oscillation (anode modulation) (if there is no modulation for each tube under keying conditions) limit value
Ua………………1000 1250 1500 1500 V
Ug………………-95 -100 -105 -500 V
Ia………………200 200 200 210 mA
Ig………………40 40 40 70 mA
Pa(in)…………………………………………315 W
Pa………………………………………… 125 W
üg(pk)…………225 230 235 V
Pd………………8.5 8.5 8.5 W
Pout………………130 170 215 W
Shipping
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).
2. We only ship to confirmed order addresses. Your order address MUST MATCH your Shipping address. We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
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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.
A. Standard Shipping(≤2KG): The Post Registered Air Mail, USPS/ePacket, PostNL, Singapore Post, or DHL Global Mail
B. Express Shipping: EMS, DHL, UPS , or Fedex, Special Route.,etc. For faster shipping and smooth transaction, we will change the shipping company among them
C. Economy Shipping: China Air Post Mail / Parcel, Hongkong Air Post Mail / Parcel, or shipment by sea etcReturns Policy
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).
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Seller Guarantees
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.
