60%

Sylvania 5U4GB Matched Pair Rectifier Tube Hickok 539B Tested

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Original price was: $66.00.Current price is: $39.60.

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Type : Rectifier Tubes
Brand : SYLVANIA
Country/Region of Manufacture : United States
Seller Notes : “Test NOS, 30 Day Guarantee”

Hickok minimum test rating is Gm 800 (65%). These test, Gm 1500/1450 and 1500/1375. Ribbed black plate, Halo getter, Chrome top. Test results from a Hickok 539A. Tester warms up for 30 minutes to stabilize before tests. All tubes preheat minimum of 5 minutes before testing. Test is conducted on a fully heated tube. Checked for shorts Gm value I test using digital read outs for accurate A/C voltage adjustment verification. . My tubes are marked with documented identifiers to prevent false return claims. Shipping Insured Priority Mail. 30 day guarantee on defective tubes. Always free return shipping.

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