4 pcs 6P41S , (6П41С) ~7868

 Output Beam Tetrode Tubes, USSR  NOS

4 pcs (tubes) per one lot

NOS (New Old Stock)

DATA:

6P41S - Output beam tetrode.

Durability not less than 2000 hours.

Weight no more than 36 g.

Technical characteristics and electrical parameters:

Electrical Rating:

• Heater voltage, V 6,3 ± 0,6

• Heating current, A 1.1 ± 0.1

• Voltage at the anode, V 190

• Voltage on the second grid, V 190

• Resistance in the cathode circuit, Ohm 300

• Current in the anode circuit, mA 66 ± 10

• Current in the second grid circuit, mA not more than 32

• Slope of characteristics, mA / V 8.4

• Internal resistance, kOhm 12

• The current of the first grid is reverse, μA no more than 1

Maximum permissible electrical parameters:

• The highest voltage at the anode, V 400

• The highest voltage on the second grid, V 350

• The highest power dissipated at the anode, W 14

• The highest power dissipated on the second grid, W 3

• The highest current in the anode circuit, mA 100

• The highest voltage at the anode with a locked lamp, V 2500

• The highest voltage on the second grid when the lamp is locked, V 550

• The highest voltage cathode-heater, V 100

• Decoration glass miniature

IMPORTANT INFORMATION! BE SURE TO READ BEFORE ORDERING! 

In the title of the lot is the name of the vintage Soviet tube and after the symbol ~ the name of the Western analog. Be careful! Soviet tubes are only approximate analogs of Western tubes and match pinout, but are not exact copies of Western tubes. Testing Soviet tubes with Western-made tube testers can sometimes show unreliable results. Programs (Cards) designed for testing Western tubes can sometimes show unreliable results and erroneously show that the tube is not good enough. But these are unreliable results and should be disregarded. The volt-ampere characteristics of Soviet tubes are different from their Western analogs!

Use for testing exclusively testers with programs for testing Soviet tubes.

If you would like to get the datasheet for the Soviet tubes in this lot, please send me a message before you place your order and I will send you a JPG datasheet for the Soviet tube.

Also, do not test vintage tubes with modern digital pulse powered tube testers. Use only testers with a classic power supply. For reliable measurement results, warm up each tube for at least 5 minutes prior to measurement.

I do not accept any claims on the quality of tubes if you test purchased Soviet tubes of this lot on testers with programs (modes) of testing Western tubes or test tubes on digital testers with pulse power supply.

Dear customer, you can combine shipping buying more than one lot.
If You need more than one lot, or another quantity - please contact. 
Also please check other available items. 

Thanks in advance!