

You always have the option of doing that if we cannot come to a satisfactory conclusion on our own... Most tube issues are pin to socket contact issues which means that there is no real problem to begin with... This does not necessarily mean that the tube is new, but tests at or above new tube typical minimums... Tester: recently calibrated Hickok 600A...
Average for new 12AU7's is 2200mmhos and a minimum good of 1400mmhos.. Average NOS test results for a 12AU7 on the Orange tester is 8-10...
AMPEREX ECC82 HOLLAND 12AU7 O GTR TIGHT MATCH PAIR NOS+ NIB MINTY VINTAGE 1965... This listing is for a spectacular condition NIB pair of 1965 Amperex Holland 12AU7/ECC82, branded for Rgers Canada, with close matched Philips Delta Gf8 production codes just weeks apart...
They have tightly matched and balanced triodes, test well in the NOS range, and in my monoblock preamp stages performed flawlessly... They are phono grade tubes, and recommended for any home or pro audio application... A true NIB and well verified pair of one of the true classic 12AU7/ECC82's ever produced.. Tube 1...2350/2475 and 9/8.
Tube 2...2550/2550 and 9/8.