The ATU that I am making for Vince has finally neared completed. My mate Paul completed the drilling of the metalwork for me; after my recent experience with drill bits I decided to let someone who knows what they are doing have a go!
So here are some pics of the nearly finished article:
An initial attempt at getting past this problem by using some isolating washers (the kind of thing you would use to isolate a TO3 transistor from a heatsync) between the screws and the two other metal bits has resulted in a rather spectacular light show at about 40-50 watts. Clearly no good, and even if it worked electricaly, the metal part of the turns counter would still be at full RF potential, dead ATU users makes for little or no repeat business, so this is no use whatsoever!
I'm going to get my aforementioned chum Paul to try and make be a plastic shaft coupler... we will have to see how that works out.
You can see the offending article at the very top centre of this picture, it's all at full RF potential:
To finish, here's a recent picture of the Geddy cat:
Al good fun though, egh?