Rare NOS RT 12AX7 ECC83 SELECTED Tubes MATCHED Amplitrex Test RTC 7025 12AX7S For Sale

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Here we have for sale is a very rare set of NOS 12ax7 ecc83 tubes. These are Radiotechique Corp. RT 12AX7 ECC83 tubes. Red dot Selected tubes of the highest quality. Premium quality European tubes made in France. Great tubes NOS tested. Tubes are a Platinum MATCHED pair with Platinum Balanced triodes just as a selected tubes should have. Best of the best! 14mm grey plates with the dual mounted O-getter. 2x tested with included Amplitrex testing with results shown in photos and listed below. Both tubes received a quality/matching grade of 8 on the Divo tester again showing them as excellent matched and NOS tubes. Don’t Miss This One!! Tubes will ship promptly and professionally packed in their original tube boxes as shown. Please read the description page and sale terms fully below. Kindly ask any questions or concerns prior to purchase and we will respond promptly. Thanks for looking!!

Tubes undergo dual testing procedures whenever possible. We utilize fully calibrated and modernized Hickok 539c, AVO 163 or Triplett 3444-A and Amplitrex testers. Then digitally tested and displayed on the Divo/Orange tester for its ease of interpretation by buyers. As a result, you are assured to be getting some of the finest quality, fully tested and proven vintage tubes available for have undergone and passed all the following testing

Heater filament test: Short circuit

Heater filament test: Open circuit

Heater filament test: Tolerance check

Heater cathode insulation: Leakage

Heater cathode insulation: Short Circuit

Tests for heater current abnormalities

Amplification factor

Voltage gain

Power gain

Screen grid test

Mutual conductance test

Dual test for double triodes

Emission

Inter electrode leakage

Inter electrode short circuit

Flash-over (arc detection, high voltage breakdown)

Gas ionisation test

*** SALE TERMS - PLEASE READ COMPLETELY ***

Please ask any questions or concerns and we will respond promptly. USA SHIPPING ONLY. Please check our other listings for more rare and hard to find tubes that are also available. All items will be very well packed and shipped the next day whenever possible. Due to the fragile and sensitive nature of vintage tubes we DO NOT ACCEPT RETURNS because of a myriad of factors including but not limited to the buyers unknown equipment condition, bias settings, misuse or mishandling etc. We will however certainly work with any buyer to address a problem that may occur such as a tube that arrives damaged in shipping. We require any buyer that encounters a problem to notify us within 72 HOURS after delivery of a pending issue. As a prospective buyer, please be aware that if you feel you can not adhere to and honor the sales terms of our listings, we kindly and respectfully ask that you DO NOT purchase tubes from us. Unless specifically stated in the listing and commonplace amongst the majority of tube sellers, we do not warranty or make any guarantees related to noise, hum or microphonics. As is commonly understood, tube testing results do not necessarily translate between different brands and models of tube testers and the different approach each manufacturer used to achieve their test results. As a result all tubes listed for sale are represented and sold on a AS-IS basis and STRICTLY off the results shown and provided by the testers used in the listings. All the testers used are some of the most respected models ever produced and are professionally calibrated regularly by top techs in the business. Calibrations are checked routinely using bogie tube sets dedicated for each tester. All the aforementioned factors ensure solid and accurate results for the tubes tested and confidence for the buyer in the vintage tubes being purchased. Therefore please let it be understood that we will not guarantee or compare the results off any other tube testers. Partial refunds or returns will NOT be granted based off claims made from unknown testers and their obviously unknown condition and accuracy. As a courtesy, every tube we sell is cleaned and treated with Deoxit to remove 50+ years of corrosion and grime.