Description: Made by Sylvania for the US Military. Ribbed black plates, D shape bottom getter. Green printing indicates military grade.Test results from a calibrated Hickok 539A.Updated parts 5/2022.539A Hickok minimum test rating is Gm 800 (65%). Test Gm 1500/1350.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 shortsGm 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.6 month guarantee on defective tubesAlways free return shipping.
Price: 65 USD
Location: Madison, Wisconsin
End Time: 2025-02-02T01:56:18.000Z
Shipping Cost: 10 USD
Product Images
Item Specifics
All returns accepted: ReturnsNotAccepted
Brand: SYLVANIA
Type: Rectifier Tubes
Model: 5U4G
Country/Region of Manufacture: United States
