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Military Signal Corps I-177-B Mutual Conductance Tube Tester - works !
Military Signal Corps I-177-B Mutual Conductance Tube Tester - works !
Military Signal Corps I-177-B Mutual Conductance Tube Tester - works !
Military Signal Corps I-177-B Mutual Conductance Tube Tester - works !
Military Signal Corps I-177-B Mutual Conductance Tube Tester - works !
Military Signal Corps I-177-B Mutual Conductance Tube Tester - works !
Military Signal Corps I-177-B Mutual Conductance Tube Tester - works !
Military Signal Corps I-177-B Mutual Conductance Tube Tester - works !

Military Signal Corps I-177-B Mutual Conductance Tube Tester - works !

$ 49.08

Availability: 95 in stock
  • MPN: Does Not Apply
  • Country/Region of Manufacture: United States
  • Brand: Hickok
  • Model: I-177-B
  • Condition: Hickok designed and spec'd WWII I-177B tube tester working. ID tag shows this unit was mfd by Simpson Co and assigned to 430 COMM of the Army Air Corps? Electronics in good working condition with a single break in the insulation of the power cord. Octal test socket needs a little cleaning as a tube inserted there sometimes needs jiggling to make proper contact. Metal case has spots of rust and could use a little cleanup and painting. Numbers and lettering are bright and clear. Controls all work easily and as designed. Manual and tube settings included. No adapters included but an addendum sheet is included showing how to make simple adapters for common 9 pin tubes of the era such as the 12**7 series etc.Tester is shown testing a calibrated 6L6 tube with results matching.
  • All returns accepted: ReturnsNotAccepted
  • Modified Item: No

    Description

    Serial #4528. I don't know the meaning of the flying eagle symbol with three stars overhead and clutching three arrows(?) but I believe it may be Army Air Corps. 430 Comm. Anyone with corrective knowledge is welcome to comment and I will add to the listing. The tube under test is a 6L6 and when the controls are set to read GM (Mutual Transconductance) directly the results are right on the money. When set to read the good/bad scale it reads in the mid range of the good scale. The power cord has a crack right at the hinge and although it has not bothered anyone recently using the tester, it should be replaced sometime in the future.
    This item is being sold in "as is where is" condition with no returns allowed due to age and rigors of shipment. Shipping to the CONUS only via UPS ground or USPS ground and insured for value. It will be well packed to minimize any chance of possible damage. Please ask questions prior to bidding.