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Seller Store valtek_2005
(16042) 99.8%,

Location: Bucuresti, default
Ships to: US,
Item: 265538764355

Restocking Fee:No
Return shipping will be paid by:Buyer
All returns accepted:Returns Accepted
Item must be returned within:14 Days
Refund will be given as:Money Back
Matched Pair 6P1P-EV:Matched Pair 6P1P-EV
Country/Region of Manufacture:Russian Federation
Tube Type:Vacuum Tubes
Product Type:Tubes
Type:NOS Tube
MPN:Does Not Apply
Svetlana:Svetlana

MATCHED PAIR 6P1P-EV / 6AQ5 / EL90 TESTED WITH ROETEST V10 BY CURVES NOS/NIBTested With Roetest V10 By Curves NOS/NIB Tested with Roetest V10, “the Rolls Royce of tube testers” [emissionlab quote], a wonderful german professional system for testing tubes, it shows everything about a tube. You are looking at a matched pair of NOS 6P1P-EV, best selected by curves using Roetest V10 professional tube testing system, the best tube tester that exists now, a wonderful device.If you have experience in the field of tubes you can find in the photos and in the details below the testing / sorting procedure and all the results, and if you do not have the necessary experience to understand what is explained you can trust that we deliver only very good tubes.The best method of selecting tubes in pairs is to overlap the G1/Ia curves, the superimposed curves show us that the tubes have the same plate current and the same transconductance in the whole operating range. One point matching method used with analog tube testers is a pretty good compromise solution, but identical tubes at one point can have big differences at higher or lower currents, testing in 20÷50 points with these devices and drawing curves take hours for each tube. Roetest does this quickly and with great precision. This is the best way to select pairs, based on overlapping curves. The tubes meet datasheet specifications, first the quality tests – filament test, shorts test, gassy test (Ig1, vacuum factor, Ia variation with 1M2 grid series resistor), kathode isolation (leakage to filament), then quantity tests – value of current for plate,G2, kathod, G1, value for transconductance, gain, G1 curve, Ia curve etc., all results for these tests can be seen on te datasheet delivered for each tube. Those who use tubes are more familiar with terms like bias, gain (µ), plate current, slope/transconductance, and maybe someone is wondering what the term „D of plate” in the measured data means. Its value in itself is not so important but it is useful to calculate the other parameters taking into account Barkhausen’s tubular formula S x D x Ri = 1 (slope * penetration * internal resistance=1), where D is –dUg/dUa at Ia=const. Barkhausen vas a german physicist, he was “the guru” of tubes, his theory and formulas guided the entire period of electronic tubes. The main technical characteristics of 6P1P-EV:The heating voltage …… 6.3 ± 0.6 V Current of glow …… 500 ± 40 mA The anode voltage is nominal (constant) …… 250 V Anode voltage limit (constant) …… 250 V Anode current …… 44 ± 11 mA Maximum cathode current 70 mA The grid voltage of the first (constant) …… -12.5 V The reverse grid current of the first …… not more than 1.0 μA The grid voltage is the second rated (constant) …… 250 V The grid voltage is the second limiting (constant) … 250 V The current of the grid is the second …… not more than 7 mA Power dissipated by the anode, limiting …… 12 W The power dissipated by the grid is the second, the limiting …… 2.5 W The voltage between the cathode and the heater is the limiting (constant) …… 100 V The steepness of the characteristic …… 4.9 ± 1.1 mA / V Internal resistance …… 42.5 ± 22.5 kΩ Output power …… not less than 3.8 W The coefficient of nonlinear distortion …… 14% The resistance in the grid circuit is the first limit …… 0.5 MΩ Input capacity …… 9.5 pF Output capacity …… 5,4 pF Container capacity …… not more than 0,7 pF The decoration …… a glass miniature.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.

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