In stock: tubes from Mesa Boogie, Sovtek, JJ, Electro Harmonix, Tung Sol & others. NOS tubes: 6V6 Sylvania, 12AT7
6L6 types in stock: Mesa Boogie STR440, Tung Sol 6L6GC, Sovtek 5881WXT
EL34 types in stock: Electro Harmonix, Mesa Boogie STR447
EL84 (6BQ5) types in stock: Electro Harmonix, Tung Sol, JJ, Mesa Boogie
6V6 types in stock: Mesa Boogie 6V6, Tung Sol 6V6GT, Electro Harmonix 6V6GT
6550 types in stock: Electro Harmonix.
12AX7 types in stock: Sovtek 12AX7WA, JJ 12AX7, Mesa Boogie 12AX7
Other small 12A types & less common in stock too. Call if not listed here
Bring in your output tubes for free testing on our Maxi Matcher 2. This shows 2 parameters on digital display, plate current, and transconductance, tested at 325 or 400 volts.
We also have a tube curve tracer to test any tube, power or preamp, however we do not offer free testing of preamp tubes at this time.
Older tube testers from the 50's & 60's often test tubes at a lower voltage than they see in circuit, and often miss certain failure modes. Older tube testers do not account for noise or micro-phonics. Matched tubes are a wise investment for output tubes. Matching within a few milliamps bias current is about the best you can do. Tubes drift over time, so whether they are perfectly matched when you install them, within hours of playing time, they can start to drift a bit.