[turretslug]

I'm assuming that David (Radio Wrangler) was discussing the general outer limits of 'scopiness (the time-honoured analogue CRT variety, that is)- the limitations when dealing with hundreds of MHz, rather than hundreds of kHz. I know that 'scopes have always held something of a fascination for many, representing the optical interface between electronics and humans, and as such, they were eager embodiments of whatever was new and clever in electronic development. Our physics teacher had done something important and leading-edge at CERN before the ignominious come-down of dealing with oiks like us and it took little encouragement to divert a lesson into the esoterics of high-end 'scopes- he reckoned that delay-line tubes could stretch to a couple of GHz.