[Texasrocker]

All very good advise indeed Exray!! Also, if ever a old chassis-design could ever benefit from making sure orig "tube-shields" arent missing,and actually used where needed, the TRFs are a classic case of needing them in most cases! As a old-timer radio tech once told me,all mfgrs TRFs chassis are: " as touchy as a old-maid at a stagg-convention"! (hee hee) No wonder most Atwater Kents used metal-cabinets as a overall chassis shield with a pop-off top lid? All my TRFs work well with approx 25' outdoor longwire antenna. Seems to balance well with all my personal sets. Todays more powerful AM local broadcasters transmitters also wreak-havoc on all the old TRFs for overloading the antennas. Thats where your suggestion of adding the cap helps alot too!! Ive used many a aluminum beer-can with both ends cut off to mfgr tube-shields for these type sets with good results also. The TRFs are super-touchy indeed in todays world of mass generated RF! Most better TRF chassis designs can even receive RF generated by most nearby neighbors washing-machines during the spin-cycle also!