TESTS STRONG TELEFUNKEN 12AX7 ECC83 PREAMP AUDIO GUITAR TUBE AMPLITREX 54
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“WE SPECIALIZE IN TONE.”
For your consideration is ONE (1) TESTS STRONG TELEFUNKEN WEST GERMANY RIBBED-PLATE 12AX7 ECC83 GUITAR & AUDIO TUBE with 'O' Getter, 17mm Long Gray Ribbed-Plates, Thick Getter Patch, & Copper Grid Posts. This tube was produced in the Telefunken Factory in Berlin. Has the etched-glass Diamond-Bottom Pyramid. Tested on a Digital Amplitrex AT-1000.
Telefunken 12AX7s... are low-noise tubes that are known for their transparency, wide-band resolution, clarity and accuracy. Many audiophiles favor them for this purpose. I do not recommend Telefunken in most guitar amp applications to use as the main tube... they are too clean and 'clinical' this application. However, Telefunkens are a GREAT 'phase-invertor' tube. Use this tube in the phase-invertor pre-amp slot (usually the closest pre-amp slot next to the power tubes). Many people notice a significant upgrade in tone, feel and string-to-string clarity when using a Tele 12AX7 in the phase invertor-slot! For this reason, the Tele 12AX7 is one of my Top 3 choices for use in a phase-invertor.
Tubes are 100% Guaranteed. Tested Strong on a Digital Amplitrex AT-1000 and B&K 707 Mutual Conductance Tester
Amplitrex Results: 1400/1300 µmhos Min Good: 1040+ µmhos New/NOS: 1500+ µmhos
Full Amplitrex test data available upon request.
B&K 707 Results: 87/81Min Good: 65+ New/NOS: 90+
Examples of the test results can be seen above in the last photos.
FROM OUR TUBE GUIDE:A well known tube amongaudiophiles and guitarists, some people regard the Telefunken ECC83 as theultimate pre-amp tube. It is used more commonly by audiophiles. TheTelefunken is considered a wide-band 'neutral' or 'clear' tube. It doesnot really impart any color to the sound. Therefore, if you have anoverly warm stereo or guitar amp, you may want to consider this tube. There are two main types of Telefunkens: smooth plates and ribbed plates. The smooth plates are usually more desirable and expensive for audiophiles, probably because people consider this type to be more 'neutral'. Telefunkens are not used in guitar amps as much as other ECC83 types. Ihave found that the smooth plate Telefunken lacks personality in a guitar ampand does not really overdrive well. The ribbed plates are a little betterin this regard. However, there is a good place to put a Telefunken smoothplate in a guitar amp... in the phase-inverter slot (usually the last slotclosest to the power amp tubes.) I have found that this can add some'clarity' and '3-D' effect to your overall sound. Genuine Telefunkensalways have an etched diamond shape on the bottom of the tube between the pins, so you must always look out for this. Telefunkens are also commonlyfaked, even with the diamond bottom. Usually these fake Telefunkens willhave perfect labeling that is 'baked-on' and will not rub off with a cloth. The glass is also lower quality and thinner, and the getter patch andhalo getter look different. This is a dead-giveaway that you are dealingwith a fake. The labels on real Telefunkens are always fragile and willeasily rub off. Look out for Telefunkens with other labels: Fisher, Gap-R Computor and others. These are genuine Telefunkens and can usuallybe had at special prices. There are also highly regarded 'Lab Quality'Medical Telefunkens that were produced for Leeds & Northrup Grummond. These will usually have red painted tips, say 'Selected' somewhere on the tube, and are sought after by audiophiles who will pay insane prices for thesetubes.
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'DEFECTIVE' ITEMS AND 'ITEMS NOT AS DESCRIBED'
Descriptions of tubes in our listings as having a certain 'tone' or being 'quiet' are descriptions of that tube type in general, and not the specific tube in the listing. Tubes are ONLY considered 'defective' if they arrive broken or shorted (no sound). Terms like 'microphonic, ' 'hums' or 'noisy' are subjective descriptions (since a tube will perform differently in every circuit), and in no way constitute a 'defective' item or an 'item not as described'. A tube is considered 'item not as described' ONLY when you receive a different brand or type of tube than what was purchased. Please see RETURN POLICY BELOW.
RETURN POLICY
100% SATISFACTION-GUARANTEED RETURN POLICY.
We want our valued Customers to be happy. If you have any questions about returns, please message us. Thank you for your time and consideration.
Testing – How We’re DifferentWe carefully screen all tubes we sell for authenticity, and also listen to the tubes to judge sound quality. We discard 20-25% of tubes other sellers may call “good, ” if they don’t pass our screening standards. All pre-amp tubes are tested for emissions, shorts, gas, and leaks on high-quality, calibrated Mutual Conductance tube testers with line level adjustment, to tweak unit calibration for every tube we test. And whenever possible, we include photos of the test results of your tube so you can see for yourself. Be certain that you are purchasing quality, premium items.While we offer an unconditional money-back guarantee for every tube we sell, we cannot guarantee that you will get the same test results at home, since there are too many variables involved with vintage tube testing, which is more of an art than a science. (For example, differing home voltages can give different readings on the same tube with the same brand and same model of tube tester). You can return a tube for any reason.Shipping:COMBINED SHIPPING within the United States for up to 5 tubes via USPS First Class Mail. Most packages will arrive in 2-3 days within the Continental United States. Our stated processing time is 2 Business Days, although we ship packages out the next day whenever possible. International Shipping is via first Class Mail for a Calculated-rate fee for up to 5 pre-amp tubes. Packages shipped by First Class Mail will usually arrive in Europe within 7-12 days, and to Latin America within 7-18 days depending on your Country’s Customs Regulations. If you have any shipping questions or requests, please email us and we will accommodate you.“We Specialize in Tone”We strive for 100% Customer Satisfaction and the best Detailed Seller Ratings. If you are unsatisfied with a tube for any reason, please return it within 14 days for a refund. (Buyer pays return shipping). If you have any problems or concerns, please email us prior to leaving Feedback and we will resolve the issue.
