UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

russell_w_b · 26th Oct 2011, 8:17 pm

Could you connect to a linesman's test-telephone or a separate 50V d.c. supply away from the line? Just trying to establish if it's hum incoming or hum generated in the telephone itself. Wonder if a few ferrite beads or some chokery somewhere might do the trick?

26th Oct 2011, 8:17 pm	#5
russell_w_b Dekatron Join Date: Jul 2007 Location: Penrith, Cumbria, UK. Posts: 3,687	Re: 1980s Tyco Big Block "Lego" Phone Could you connect to a linesman's test-telephone or a separate 50V d.c. supply away from the line? Just trying to establish if it's hum incoming or hum generated in the telephone itself. Wonder if a few ferrite beads or some chokery somewhere might do the trick? __________________ Regds, Russell W. B. G4YLI.