This listing is for a Trio of Matched 6JB6 Final Tubes for the RL Drake TR-4 series transceivers.You can also use a pair in the T-4 Transmitters and have a matched spare.
These are mixed brands, matched the same way the on line suppliers match them.
They are new old stock in boxes.These are tested on my new computer based tester for mutual conductance and idle current.When you are matching tubes for use in a radio, the idle current matching is the most important part of the matching.
The readings are as follows:#1 GE gM=7040, Current = 210 mA.#2 Pro/Comm gM=7920, Current = 212 mA.#3 RCA gM=7216, Current = 205 mA.
Thus the tubes are matched to within +/- 3.5% for current and +/- 7% for mutual conductance.I am happy to answer your questions to the best of my ability.PHOTO SHOWS ACTUAL ITEM FOR WHICH YOU ARE offerDING! NO EMAILS WILL BE ACCEPTED IF THEY DO NOT COME THROUGH \'S EMAIL SYSTEM. PLEASE PASS ALL CORRESPONDENCE THROUGH . NO OTHERS WILL BE RECEIVED. ALL CORRESPONDENCE FROM ME TO YOU WILL ALSO GO VIA THE MAILING SYSTEM. OUS buyers alert: Don\'t ask me to lie on a customs declaration form as I will not do it. If there are any problems in your getting your winning buyer email, call me immediately on the telephone number I have on file at . offers from buyers with excessive negative response will be canceled. NO COD!!

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