-40%
1pcs 6P21S Foton Brand, Soviet Vintage Tetrode Tube, Rare 1959-s
1pcs 6P21S Foton Brand, Soviet Vintage Tetrode Tube, Rare 1959-s
1pcs 6P21S Foton Brand, Soviet Vintage Tetrode Tube, Rare 1959-s

1pcs 6P21S Foton Brand, Soviet Vintage Tetrode Tube, Rare 1959-s

$ 4.75

Availability: 100 in stock
  • Item must be returned within: 30 Days
  • Custom Bundle: No
  • Brand: Soviet
  • Condition: Rare
  • Type: Vacuum Tube
  • Modified Item: No
  • Return shipping will be paid by: Buyer
  • All returns accepted: Returns Accepted
  • Model: 6P21S
  • MPN: Does Not Apply
  • Refund will be given as: Money Back
  • Country/Region of Manufacture: Russian Federation

    Description

    1pcs 6P21S Foton Brand, Soviet Vintage Tetrode Tube, Rare 1959-s
    1pcs (tubes) in one lot
    DESCRIPTION:
    Directly heated beam tetrode for amplification and generation of high frequency oscillations. Design - in a glass shell, with an octal base. Weight 70 g.
    Basic parameters at Uн = 6.3 V, Ua = 600 V, Uс2 = 200 V, Uс1 = -16 V
    Parameter Conditions 6P21S Unit rev.
    Analog - - -
    Filament current - 700 ± 110 mA
    Anode current - 36 ± 14 mA
    at the beginning of the characteristic 1 mA
    Cathode emission current - ≥150 mA
    Reverse current of the first grid - ≤3 μA
    Second grid current 1.5 + 3.5 mA
    Slope Ua = 250 V, Uc2 = 150 V, Uc1 = -6 V ≥4 mA / V
    output power
    f = 80 MHz ≥28 W
    Un = 5.7 V ≥20
    Vibration noise voltage Ra = 2 kΩ ≤1000 mV
    Input interelectrode capacitances 8.2 pF
    output 6.5
    checkpoint 0.15
    Operating time - ≥750 h
    Criteria for evaluation
    Output power f = 80MHz ≥20W
    DELIVERY:
    Dear customers, we ship via International Airmail.
    Perfect and safely shipping. Tracking number is always provided.
    We use standard mail service for shipping all tubes/valves.
    We ship from Ukraine.
    Important note - all international mail services are currently working, so purchased items will 100% be shipped to your location!
    We combine lots to save you money on delivery.
    Parcels are divided into categories depending on the weight ( product + package weight).
    Delivery prices:
    0-250 grams - 7.9-10 $
    Package weight (50 grams)
    250-500 grams - 14 - 16 $
    Package weight (100 grams)
    500-1000 grams - 24-28 $
    Package weight (200 grams)
    Every next kilogram + $ 10 and + 200 grams of weight.
    You will be able to choose the most favorable ratio of price, product and cost.
    The price of delivery has increased significantly, but we try to almost not change the cost of delivery.
    If you accidentally overpaid for delivery, we will refund your money.
    If you have any questions, we are always ready to communicate and help you.
    However, some delays in both Standard and Express services may happen.
    ANY QUESTIONS?!
    Direct in eBay messages and we will help you.