Description

Tested Pair of 6BL8 Mullard Audio Receiver Preamplifier Vacuum Tubes Country of origin: Great Britain Production era: 1960s Model: 6BL8 Manufacturer: Mullard Type: preamp Plate type: gray with copper rods Base type: 9 pin Spacers: two Filaments: standard Getter frame: D type wire Getter flash: top flashes Glass: Clear with seams Stencils: very good, minimal wear Condition: excellent (one tube is NOS NIB), same construction Original carton: one only Usage estimate: minimal Quantity: 2 Please review the photos for more detail Test results: Excellent strong balanced test results for Gm: 6.0 / 5.3 and 6.8 / 6.1 For Gm, the suggested minimum value is: 3.6 / 2.9 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