Соответствует Quad (0% тол.) 6P14P-EV/EL84M/6BQ5 трубки Nos otk/ромб 1982-86!

Matched QUAD 6P14P-EV // EL84M // 6BQ5 TUBES NOS. GOLD GRID 0% tolerance!!! Made in USSR. REFLECTOR PLANT Military equipment, “OTK” , high reliability. Military quality check passed ( rhombus ) NEW in BOX 4 UNITS MATCHED! Made in 1981-86 SAME DATA CODES!!! The tubes are never used. Old stock. This tubes were tested on high end russian military tube tester L1-3 by a qualified e ngineer! 6P14P-EV is a excellent tube to use in audio amplifiers, it has 5000 hours lifetime guaranteed by manufacturer and is the same tube/direct replacement with EL84, EL84M, 6BQ5 etc. Each tube is heated for at least 30 minutes, listened in an amplifier with plate current monitoring and a 1 kHz oscilloscope view of a sine wave. After that each tube is tested using L1-3 or L3-3 tube tester, first for shorts, leakage heater-cathode and Ig1 no more than 0.1 micoA and then are meaured plate current and transconductance. The sorting of tubes in pairs or quads is done taking into account both the anode and the transconductance. For example, in a pair of 0% both tubes have exactly the same anode current and the same transconductance at the test conditions: Up=256V, Ug2=256V, Uh=6.3V, cathode biasing. The main technical characteristics of 6P14P-EV : The heating voltage …… 6.3 ± 0.6 V Current of heating …… 760 ± 60 mA The anode voltage is nominal (constant) …… 250 V Anode voltage limit … 300 V Anode current …… 48 ± 8 mA Cathode limiting current …… 65 mA The grid voltage is the second rated (constant) …… 250 V The grid voltage is the second limiting (constant) … 300 V The current of the grid is the second …… not more than 7 mA Power dissipated by the anode, limiting …… 14 W The power dissipated by the grid is the second, the limiting …… 2 W The voltage between the cathode and the heater is the limiting (constant) …… 100 V The steepness of the characteristic …… 11.3 mA / V Gain in triode switching …… about 20 Internal resistance 30 kΩ Resistance in cathode circuit for automatic bias …… 120 Ohm Input capacitance …… about 11 pF Output capacity …… about 7 pF The capacitance is about …… 0.2 pF Please allow for the following shipping times: EU countries: 5-8 business days, on rare occasions a few days more USA: 10-15 business days, on rare occasions more South East Asia (Japan, Singapore, S. Korea, Hong Kong, Taiwan etc) 10 business days, on rare occasions more India, China, Russia, Kazakhstan, Pakistan, Indonesia, Malaysia, Thailand, Australia, South Africa etc: at least 15 business days, but frequently around 25 business days Please note that shipping cost is calculated at average. If you have any objections please contact me for a specific quotation.