The Four Metres Website
Home Operating People Equipment Technical Contests Photos Links Forum
Equipment

70 MHz Big Wheel

By Peter OE5MPL and Rudi OE5VRL

Mechanical dimensions

Not drawn is the fixing point of the female N-connector and the center conductor on upper part of hub. We fixed the antenna with a 50 mm diameter aluminium pipe, which was welded onto the lower hub.

Bill of material

8 pcs bolts M8x20 mm for insulator fixing

12 pcs bolts M8x30 mm for lambda/4 spacers

2 pcs bolts M8x10 mm for matching stub

24 pcs nuts

all stainless steel

6 pcs square aluminium 15x15x1,5 mm

3 pcs aluminium rod 2160x8 mm for the arcs

1 pcs aluminium sheet 120x20x2 mm for matching stub

2 pcs aluminium plates 160x160x8 mm for hub

4 pcs polyamide insulators 40 mm long, 30 mm diameter

6 pcs square aluminium 1065x15x15 mm, 1,5 mm wall thickness for spacers

For further information please contact: oe5mpl or oe5vrl both at @oevsv.at



Site created and maintained by David G4ASR, Stewart GM4AFF and Bo OZ2M