NOS ITT JAN 8493 Klystron Tube. found one test result.They are very rare. – it is in good condition. The characteristics are as shown in the picture.
Item Tag: ITT
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Vintage ITT Germany Audio Speaker Tweeter LPKH91/19/145FK 8 Ohm
Cool tweeter, looks to be in good unused condition, see all the photos.
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NOS 6SN7 GTB Carbonized Black Plates Ring Getter Mullard Tooling, 1-gold Pin
NOS tubes fall within the Gm characteristic range of an average tube, as published in the RCA RECEIVING TUBE MANUAL, which states “Individual tubes, like any manufactured product, may have characteristics that range above or below the values given.