Description

Up for grabs is an outstanding pair of the rare Mullard EL84/6BQ5 tubes. rX3 series tubes with grey plates and O-getters. MATCHED and super strong tubes with tons of life remaining. Not that far off from new spec with just light prior use. Highly desirable early production tubes with the sooty glass. Great solid set of tubes here! Made in the famous Mullard Blackburn factory. Matching date/batch codes of rX3/B4K3 and rX3/B4G1 and shown in photos. These Mullard EL84 tubes are the secret to that famous VOX chime in their amps. These tubes will wake up the tone of any vintage or newer production tube amps using the EL84/6BQ5 tubes that typically come with low quality JJ, Russian or Chinese tubes stock. Tubes will ship in the new Mullard boxes as shown. Don’t miss out on these!!! Tubes undergo dual testing procedures whenever possible. Analog tested on a fully calibrated and modernized Hickok 539c and 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 sale. ************************************************************************ Hickok 539c results T1= 10,905 gm / 45.7 la T2= 10,155 gm / 42.8 la Hickok minimum = 5650 gm NOS spec = 11,300 gm / 48.0 la ************************************************************************ Tubes have passed all the following tests: 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 I will respond promptly. USA SHIPPING ONLY. Please check my other auctions for other rare and hard to find tubes that are also available. All items will be very well packed and shipped the next day whenever possible. Although I DO NOT ACCEPT RETURNS because of the sensitive nature and personal tastes associated with vacuum tubes, I will certainly work with any buyer to address any problem that may occur such as a tube that arrives damaged in shipping etc. I require any buyer that encounters a problem to notify me within 72 HOURS after receipt of a pending issue. If as a buyer, you feel you can not adhere to the sales terms of my listings, I kindly and respectfully ask that you do not purchase tubes from me. Unless specifically stated in the listing and commonplace amongst the majority of tube sellers, I do not warranty or make any guarantees related to noise, hum or microphonics. As is commonly understood, tube testing results do not translate between different brands of testers and the different approach each manufacturer used to achieve their test results. As a result all tubes listed for sale are sold “As-Is” and represented and sold 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 yearly by the best techs in the business. Calibrations are checked regularly using bogie tube sets dedicated for each tester. All of which 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 I will not guarantee or compare the results off any other testers nor will partial refunds ever be granted especially based off unknown testers and their obviously unknown condition and accuracy. As a courtesy, every tube I sell is cleaned and treated with Deoxit to remove 50+ years of corrosion and grime. ***IMPORTANT NOTICE TO OVERSEAS BUYERS MUST READ!!!*** Please Be Aware….All my listings are sold strictly for shipping only in the USA. If you are an overseas buyer that registered the ebay global shipping program depot or other 3rd party shippers address as your formal address registered with ebay to be able to circumvent the USA only shipping policy, be aware that as the seller I WILL NOT be held responsible for any items rerouted overseas. You do so at your own choosing and OWN RISK!! I can only guarantee the packages safe arrival at the USA address listed on your ebay account. I WILL NOT BE RESPONSIBLE for any lost or damaged packages outside of the continental USA borders. For Best Results DEOXIT Your Sockets!! FEEDBACK: I will leave excellent feedback for the buyer once I receive their feedback indicating they have received their item in good condition and are satisfied with the transaction and their buying experience.