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

ms660 · 7th May 2022, 6:58 pm

Most valve radios that work on AC with an isolation transformer will have a transformer primary resistance of below 100 Ohms.

Those that work on mains/battery with an isolation transformer such as 1.4 volt filament valves are likely to have a primary resistance of several hundred Ohms.

Lawrence.

7th May 2022, 6:58 pm	#11
ms660 Dekatron Join Date: Apr 2011 Location: Cornwall, UK. Posts: 13,454	Re: GEC BC5050 receiver. Most valve radios that work on AC with an isolation transformer will have a transformer primary resistance of below 100 Ohms. Those that work on mains/battery with an isolation transformer such as 1.4 volt filament valves are likely to have a primary resistance of several hundred Ohms. Lawrence.