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+++ B&K 707 Tube Tester MUTUAL CONDUCTANCE +++ WORKS +++, US $550 – Picture 0
+++ B&K 707 Tube Tester MUTUAL CONDUCTANCE +++ WORKS +++, US $550 – Picture 0

+++ B&k 707 Tube Tester Mutual Conductance +++ Works +++

US $550

  • Bradenton, Florida, United States
  • Jun 9th
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Here is a nice tube tester I ran across the other day, a mutual conductance B&K 707 model. It is tested, at least partially.  I checked it with a 12au7 and my 6L6 reference tube (pic is of the 6L6 testing.)  Test results were as expected (6L6 reference tube = 100% of new) and close to my calibrated Hickok 547A. It looks to have been recapped by a previous owner as the electrolytics under the face plate have been updated. Has a big RCA 83 tube also, updated (not the B&K labled original.) I don't think this one was used at a tv shop as the 12au7, 12at7, 12ax7 socket #8 is tight, not loose. Has a few nicks in the blue covering material. I noticed the pilot lamp looks to be burned out (no light.) I haven't checked every function, nor every socket, nor tried to calibrate it since it gave good test results. It's being sold as is.  Any marks on the meter face are actually scratches on the clear meter lens and can be polished out. Look carefully at the pictures to determine cosmetic condition. Latches, hinges, and handle work great, four original rubber feet on the bottom. Comes with the reprinted manual and tube set-up charts as seen in the pics. Includes the grid/plate cap connector (forgot to get it in the pics.) Shipping Priority mail insured and well packed.

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