[Amps] Mica cap substitute \ alternative

[Peter Chadwick]

So we are  told that some manufacturers derate some mica caps above 5MHz. Others have caps that in slightly different applications have ratings that are high. Some mica caps can handle high currents in the VHF range. Dissipation factor wouldn't, prima facie. seem to be the critical parameter between all these products.
I can't say that I'm any the wiser - possibly a little better informed.
73
Peter G3RZP