UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Problem with telephone 248 and bellset 44.

Dave Moll · 27th Feb 2021, 11:05 am

The only oddity I can spot there is that T9 should connect to B31 and B32, as B31 is connected internally to nothing other than B32, though this connection only serves to enable the dial to be shorted out in the "extn to exch" position.

The move of T2 (orange) from B27 to B14 bypasses the internal 2μF capacitor in order to use the external one connected by the blue wire from the master socket.

Just to double-check, you are using this setup with the selector switch set to "spk to exch" I presume.

27th Feb 2021, 11:05 am	#16
Dave Moll Dekatron Join Date: Feb 2005 Location: West Cumbria (CA13), UK Posts: 6,127	Re: Problem with telephone 248 and bellset 44. The only oddity I can spot there is that T9 should connect to B31 and B32, as B31 is connected internally to nothing other than B32, though this connection only serves to enable the dial to be shorted out in the "extn to exch" position. The move of T2 (orange) from B27 to B14 bypasses the internal 2μF capacitor in order to use the external one connected by the blue wire from the master socket. Just to double-check, you are using this setup with the selector switch set to "spk to exch" I presume. __________________ Mending is better than Ending (cf Brave New World by Aldous Huxley)