We get FFT issues if we run fatigue tests fast on a triangular waveshape. If we go above 7Hz, we get rounding in the peak and trough of the wave. Its a right old nightmare, the hydraulic servovalve cannot react fast enough to give a sharp turning point.
"Is that the Cambridge Portable Potentiometer, Grayson?" "Whiy yes, Mr Cholmondley Warner. I believe it is"
Love the round the corner thermometer to measure the temperature near the terminals. The concept of balancing voltages to measure them without disturbing the circuit you are testing was important when you could only get fancy batteries as voltage references where you could not draw current from these. Nowadays we use scaled transistors in precise ratios and the band gap energy of silicon to produce a 1.2 volt reference..
They were one of the suppliers of equipment that we ordered stuff from - could usually only afford to get one CRO a year - needed about 10 of them for 6th form pracs - by the time we had 10 , the first one was on the blink.
Definitely a name from my childhood. Every bit of science kit at school was made by Griffin and George.
My Beckman is getting tired now after many years of showing electricary happenings. Gone over to Laptop USB powered one now much easier to record wave forms. Although still use a Velleman handheld for when I'm out and about.
Yes, very collectable, however, there's a Dutch chap who did a modern version you build up yourself. I've had a go of one, it is/was very a good alternative. I hope he's still doing them, I don't keep up as much as I used to with valve world, the day job got too close to the hobby and I bought a Beetle instead
