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2.) Put a USB port on it and provide data output so you could draw curves for the tubes and print data-sheets for the individual tubes. I don't know if the testing process yields something along those lines. But the device does appear to operate the tubes throughout much of their active region of interest. Maybe even just an excel output for ... The Svetlana 6L6 Medium tubes have the classic Sylvania STR sound.Soft, medium, and hard style descriptions refer to break up modes of the tube for an overdriven guitar signal. Soft-rated tubes break up easier and have the least headroom, yielding a heavier, harder distortion. Also, your numbers don't match the data sheets I have (or those on the DuncanAmps site). The Amperex EL34 sheet shows 11.5/22.5 mA per tube (zero-signal/full power), while the GEC KT66 sheet shows 2.5/9 mA - at a higher-voltage operating point. These numbers suggest that EL34s draw between two and three times the screen current of KT66. It really is still a tube tester that is fast, and easy to use. Should you own a B&K 707, do ‘look after it’, and make sure you have the owner’s manual. All in all, I really do like B&K tube testers, as well as B&K tube tester advertising. With preamp tubes, such differences can cause different volume settings (for example) to achieve a given sound level, but using a different control position, has now likely changed the response of the circuit, and therefore, the character is the sound. The tube did cause the change, but only indirectly in this example. Buy JJ EL34 Burned In Vacuum Tube, Apex Matched Quad: Tubes - Amazon.com FREE DELIVERY possible on eligible purchases Just Google the type of tube you want followed by "data sheet". Below is the EH 6ca7 data sheet. You can see the maximum parameters. Here's a quick link that shows the generic parameters for various types of tubes. Use the index on the left to select the tube type. Keep in mind a tube type (6l6, el34, kt77) all have design parameters.