"Bob Parker"
** Not the same one - I built the simpler May '66 version, with 2MHz bandwidth.More compact, case less than half the size (5 x 7.5 x 8.5 inch) and used only 5 valves:
1x12AT7 Schmitt trigger, 2x6BL8 for horizontal sweep and 2x6GH8 for the vertical amp.The shift, focus and astig pots were moved to the rear.
The 1S/cm time was left out as was DC coupling, illuminated graticule, filter choke and brightness pot.
But the Mu-Metal CRT shield was kept and it uses a custom Ferguson tranny ( with copper strap) for all voltages.
The overall DC voltage on the CRT was increased to 650V, making the trace quite bright and sharp.
I still have it and it still works with the original CRT.
It even got a recent up-grade with a BNC socket on the front !
.... Phil