GERMANY TUBE AMP DOCTOR (TAD)- USA Authorized Dealer 4 X SELECTED TUBE EL84M-R MATCHED QUAD EL84M TAD-Tubes, Premium Matched – Military Grade Tube – Russian Made Your 1st Choice When Dependability is Your Major Goal! The TAD EL84M offers strong mids and defined bass response. Even, when played at lower volume or in a complex stage sound situation, your sound will prevail. This is the most reliable and longest-lasting military grade EL84 on the market and operates up to 10,000 hours. Unfortunately, this tube is not being produced anymore. Grab them, while they last! Our company CTech Electronics stands behind all of our products and services. Should you ever have a problem with our products or services, we will work with you to resolve it as quickly as possible. We are not just tube sellers but service the equipment they are used in. We are here with technical help for you should problems development with your equipment. Check our feedback and bid with confidence. Shop our Ebay Store for more fantastic electronic products and services. On Dec-05-09 at 07:43:41 PST, seller added the following information:Note: International Buyers are responsible for all import duties and taxes for the country this item is shipped to. Please consult your customs dept.officials to determine what you will need to pay. CTech Electronics assumes no responsibility for any of these fees. If you cannot pay the fees do not purchase this product as your item will remain in customs and you will not be able to get it out without personally paying the fees.
Item Tag: Tubes
MATCHED PAIR E80F Philips SQ Gold Pin TESTED WITH ROETEST V10 BY CURVES NEW
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. Roetest does this quickly and with great precision.
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Pair of 6084 (E80F) Tubes, By Philips of Holland, Gold Pin Class
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E80F Philips SQ pair gold pin +/-1% NOS/NIB Matched by curves, RoetestV10 tested
E80F Philips SQ pair gold pin +/-1% NOS/NIB matched by curves, RoetestV10 tested For sale is a pair of E80F SQ Philips gold pin in Zaerix boxes,2 tubes that have wonderful superimposed curves.The tubes passed all quality tests (vacuum, leaks, shorts etc.), measured with Roetest, curves analyzed, maximum accepted spread for this selection is +/-1% , the buyer will get all data, actual datasheet – test protocol, for each tube.In photos you can see example of data for a wonderful pair.Condition for test: 250V/150V/-2V typical 100% results 3mA and 1.85mA/V. 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. 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. 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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E182CC/ 7119 PHILIPS SQ GOLD PIN IN ADZAM BOX TESTED WITH ROETEST V10 NOS/NIB
E182CC/ 7119 PHILIPS SQ GOLD PIN TESTED WITH ROETEST V10 NOS/NIB Lot of 1 Pcs. NOS/NIB Lot of 1 Pcs. Buyer will receive the exact tube seen in photos. 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, 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. 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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E182CC/ 7119 VALVO TESTED WITH ROETEST V10 NOS/NIB Lot of 1 Pcs.
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. NOS/NIB Lot of 1 Pcs.
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E180CC 7062( 5965, 12AT7) Tube, Philips “SQ” special quality pinched waist
“SQ” special quality rare find.
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One Matched Pair Early 12AT7WC / 6201 Tubes, From GE
One matched pair of 12AT7WC/6201 tubes by GE, all tested good. New tubes at about 90-100 (a big swing among most of the ST tubes). Most of my tubes were U.S. made.
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One Lot of Four Military 12AT7WC/6201 Tubes, GE, Grey Plate, Solid Disc Getter
Grey plate and solid disc getter. The green print for 12AT7WC mostly off due to age. One lot of four military heavy duty 12AT7WC/6201 tubes by GE. Most of my tubes were U.S. made.
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Pair of 5814A Tubes, GE 5-STAR, Good Ratings
One pair of 5814A tubes by GE, 5-STAR ranking, one from USA, one from Canada, but similar plate designs. One 4-pole and solid disc getter, one 2-pole and 0-getter.