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5703 WB RAYTHEON VACUUM TUBES MATCHED PAIR Lot NOS Electron Valves Ampfilier TV7, US $93 – Picture 0
5703 WB RAYTHEON VACUUM TUBES MATCHED PAIR Lot NOS Electron Valves Ampfilier TV7, US $93 – Picture 1
5703 WB RAYTHEON VACUUM TUBES MATCHED PAIR Lot NOS Electron Valves Ampfilier TV7, US $93 – Picture 0
5703 WB RAYTHEON VACUUM TUBES MATCHED PAIR Lot NOS Electron Valves Ampfilier TV7, US $93 – Picture 1

5703 Wb Raytheon Vacuum Tubes Matched Pair Lot Nos Electron Valves Ampfilier Tv7

US $93

  • Covington, Georgia, United States
  • Oct 29th
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The test results for the tubes showed a minimum good of 25 (3125 mho) and a datasheet nominal new of 40 (5000 mho). However, these tubes tested at 42 and 42 (5250 and 5250 mho), making them a strong and even testing pair. The seller has other listings for different quantities of these tested matched 5703 tubes, and international buyers need to provide a physical shipping address due to country-specific customs import fees. This article is about a lot of vintage JAN 5703WB vacuum tubes made by Raytheon in the USA. The tubes are subminiature and come in a matched pair, with matching codes from 1982, black plate, and foil getter. This lot is the ruggedized version of the 5703 that was made for the military. To ensure their quality, the seller allows the tubes to warm up before testing and tests them twice, checking for any shorts or gas. The tubes were tested on a TV-7D/U, which is a dynamic mutual conductance type service tube tester with a meter. The numbers on the meter are relative to the test settings in the set-up manual and for many amplifier tubes, these test numbers can be converted to micromhos (mho) for relative comparison. The seller's TV-7D/U has been completely refurbished, upgraded and calibrated, and is checked on a regular basis to ensure its accuracy.

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