Description

Tested Trio of 13DR7 Mixed Brands NOS NIB Audio Receiver Preamplifier Metal Vacuum Tubes Country of origin: USA Production era: 1960s Model: 13DR7 Manufacturer: RCA, Raytheon & Westinghouse Type: preamp Plates: black/gray Getter frames: halo Getter flash: top Base type: 9 pin Stencils: excellent Condition: excellent Original carton: two excellent and one poor Usage: NOS (new) Quantity: 3 Please review the photos for more detail Test results: Excellent strong balanced test results for Gm: 2.2 / 6.2, 2.2 / 6.2 and 1.65 / 5.9 For Gm, the suggested minimum value is: 1.4 / 4.2 Shorts: None detected For testing, a calibrated Triplett 3444A tester was used Compatibility: Suitable for vintage tube-based equipment ideal for use in tube amplifier power supplies and vintage audio / test equipment The tube will be carefully packed to ensure safe shipping Estimated delivery time within the USA is 3 to 7 business days Standard shipping service is US Postal 1st class Shipping is combined when applicable Please feel free to contact us if you require any additional information