The factory codes on these tubes are: AAA3 B3J5 AND AAA3 B4I5

Made by Mullard in Blackburn, England

These are 3 mica gray plate tubes stenciled GT-Britain  

Write a review

Please login or register to review

40KG6A PL509 Philips Mullard Made Vacuum Tube Pair

  • Brand: RCA
  • Product Code: Philips Mullard 40KG6A
  • Availability: 1
  • $39.99 USD
  • $33.99 USD


Related Products

RCA 6202 Full-wave Rectifier Ruggedized 6X4 Vacuum Tube

RCA 6202 Full-wave Rectifier Ruggedized 6X4 Vacuum Tube

Black Plate NOS Guitar Amp full-wave rectifier Date Code 6930..

$12.99 USD

Telefunken EL84 / 6BQ5 Diamond Bottom Pair Vacuum Tube

Telefunken EL84 / 6BQ5 Diamond Bottom Pair Vacuum Tube

This is a pair of used EL84 tubes, made in Germany. Tubes tested 8000 and 6750 with minimum new..

$37.99 USD

SK3011 NPN Germanium Transistor RCA SK Series

SK3011 NPN Germanium Transistor RCA SK Series

New Old Stock In Original Package ..

$3.99 USD

Telefunken 6GW8 / ECL86 Matched Pair Vacuum Tube

Telefunken 6GW8 / ECL86 Matched Pair Vacuum Tube

Used tubes from same audio channel, made in Germany. Results from test on Hickok 752A: 7000/725..

$44.99 USD

Telefunken EL84 / 6BQ5 Diamond Bottom Vacuum Tube

Telefunken EL84 / 6BQ5 Diamond Bottom Vacuum Tube

Tested 6750 mhos on Hickok 752A, where the minimum new is 4750Made in West Germany and has halo gett..

$28.99 USD

Tags: 40KG6A, PL509, Vacuum Tubes