glip22
Well-known member
Winged C or I like the Groove Tubes e34ls over the JJe34L. Less failures in my experience and the GT sound better. They have added heat sink wings and different grid wire. I have had quite a bunch of NOS. Tesla, Mullards Xf2-4, Phillips DD getters etc,. All of those are nice. Mullard xf2 but the single getters were tops. Siemens RFT made are nice but be careful with screen voltage over 450. Bias them low as they never held together with a higher PV amp from what I remember.
