Some time ago I made a 8877 amplifier for 6m. It was a little low on
efficiency, it turned out that you cannot use brake pipe as it contains
nickle.
Ever since then I have used soft copper or silver plated copper and
brass in my VHF amplifiers and I have used brass fasteners throughout.
In my latest 3CX800 6m amp which goes live this weekend I have
fabricated my own tune C from some pieces of aluminium and a few parts
stolen from another capacitor. Need I worry about the brass screws used
to fasten the copper strap to these aluminium plates? It will be bone
dry in the anode compartment so I am hoping that corrosion cannot occur
as there will be no electrolyte. I could coat the fasteners in some nice
HV varnish that I have to keep any air out if anyone thinks that it is
necessary.
Comments?
Regards
Conrad PA5Y
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