After replacing the tubes in my V.Jr head in November, I kept getting the itch to do something else to it. So I ordered a Hammond 125DSE output transformer. The Hammond is larger than the stock OT, plus it's wired for 5K impedance, which is much closer to what the EL84 tube likes than the stock 7.5K transformer that comes with it. $32.00. I pulled the chassis out of the amp, wired in the Hammond, did a little wire tie cleanup, and put it back together. It helped the sound quite a bit. I think I'll change a few resistors out and see if it "opens up" the sound as much as the "mod squad" guys say.