The dimensions of the box are 32 x 20 x 20 cm (h,w,d) Made of 3mm thick
Grid plate is made out of 3mm brass.
The plate line is a 10cm dia. copper tube 12cm long, from bottom of cooler to top of line.
Plate tuning disk is 50mm diameter opposite a 60mm x 60mm plate with a layer of teflon sheet
fastened to it.
Loading disk is 35mm (+/- 5mm) diameter opposite teflon sheet mounted on anode line.
Air barrier is 1.6mm epoxy PC board with all copper stripped off.
Input tuned circuit is 10mm x 40mm brass strip with fingerstock connection to cathode. A
0.5-3pF capacitor is in series with the input, and C to ground is 2 disks, 30mm diameter.