I also have a 25Mhz Dual Trace Oscilloscope which I sometimes use to trace out signals in one of my Pedal builds, I bought it new from Dick Smith Electronics back in the late 90's, back then, it cost me around $700.00 or so, it's a great bit of test gear, I also have a small single-trace 10Mhz Oscilloscope, next year I'm going to look at buying a new Digital Oscilloscope , and I'll also start ordering some new components for a Soldano SLO 50 amp head I'm going to be working on, the chassis is currently sitting on top of my Marshall amp, it uses five 12AX7 twin-triodes, and two EL34 power pentodes, should sound pretty cool once it's finished and working.