are a wonderful addition to the JJ line and it's great to finally have a real
new production KT66 that has all of the sonic qualities of the original! A very
thick and rich sound with lots of harmonic complexity and a wonderfully smooth
breakup when driven into saturation. These are killer in the Dr Z RT 66 along with all the other classic KT66 applications. We are
also using these in Mesa Dual and Triple Rec's all by themselves and in
combination with KT88's and 6L6GC's. We have researched the proper grades to
get the bias right where is should be with no bias mod. You can find kits in
the online store!
In case you have heard horror stories about the metal bases being connected to a pin and causing shorts, the culprits are the sovtek KT88 and KT66 tubes. This is NOT the case with the JJ Electronic KT66's and KT88's where the bases are isolated as they should be.
After a 24 hour burn in all power tubes are tested for noise and matched at multiple operating points for plate current (± one milliamp) and transconductance.