> I have been around a lot of amps ..... Every amp that had a parasitic
>blowup episode used a 3-500Z . I'm talking TL -922 , SB-220 , AL 80 , AL
>80a ,AL82, SB-1000 , Drakes, Viewstars & more ... If it has a 3-500z
>....it WILL someday hand grenade, I had two go off next to me , my friends
>SB220 & AL80.... blowing parts everywhere & dreaded grid to filament
>shorts.......I have no confidence in that tube. Every time I use an amp with
>a 3-500z in it , I am waiting for the big bang .....
Coming back to this "rules of evidence" thing: how do you *know* it was
a parasitic, from the evidence it left behind?
73 from Ian G3SEK 'In Practice' columnist for RadCom (RSGB)
Editor, 'The VHF/UHF DX Book'