I'd be? more? worried? about? the? current? rating..vs? V? rating.? ?What? bands are? you? planning? to? use..and? what? tube(s) ?? ?If? u? are? using? tubes? with? typ stray? C? between? anode? and? grid (assuming a GG? triode...or? ?tetrode..strapped? like a? high? ?mu? triode)....? the? current? through the? plate blocker? can? get? pretty? high? on? the? upper? bands? like? 10m.....? it's? easy? to? calculate? plate? block? current.? ?Alpha? just? uses? a pair? of? 6? kv? disc? ceramics? in? parallel? for the? plate blocker.?
Problem? with? mica's? is.... they? rate? em? for? current at? 1? mhz? (and? in? ur? case,? 300? khz) .? U? might? be? able? to? test? by? feeding? RF? through? the? mica...then? into? a dummy? load.? ?200w? is? 2A? into? ? 50? ohms.? Then? try? all? bands.? Current? rating? on? mica's? decreases as? freq? increases.?
Jim? ?VE7RF?
