All EL84 include our 6 month replacement warranty. For best results replacing 7189, we suggest Sovtek EL84-M, or JJ EL84. Sovtek EL84 Standard grade EL84/6BQ5, fine for old radios, etc, also Standard issue in many new amplifiers. JJ 6BQ5/EL84 A best buy, good tone and reliability for a very reasonable price. 7189/EL84M Sovtek A heavy duty EL84 that's a good replacement for 7189 as well. These sound a little more powerful in EL84/6BQ5 applications. Used by Matchless. 6BQ5/EL84 Types 6bel71elsv 6BQ5 EL84 Tesla/JJ (Slovakia) Matched Quad Nice version of EL84 6BQ5 made by JJ Electronic in the Slovak Republic. el84jjmq 6BQ5 EL84 Tesla/JJ (Slovakia) Matched Pair Nice version of EL84 6BQ5 made by JJ Electronic in the Slovak Republic. el84jjmp 6BQ5 EL84 Tesla/JJ Single Tube Nice version of EL84 6BQ5 made by JJ Electronic in the Slovak Republic. el84jj Triode, USA Customer Service M-F 9AM-4PM CT 1-800-774-3201 Email us Anytime: questions@triodestore.com