UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Cossor 494AC. My first proper restoration

Peter.N. · 9th May 2009, 9:47 am

If you have volts on the anode and screen, the only other cause of no cathode volts would be a s/c by pass cap or a hefty negative voltage on the grid (pin 5) but I can't see what could cause that - ohterwise I think you must have two dud valves.

9th May 2009, 9:47 am	#5
Peter.N. Dekatron Join Date: Jul 2008 Location: Charmouth, Dorset, UK. Posts: 3,601	Re: Cossor 494AC. My first proper restoration If you have volts on the anode and screen, the only other cause of no cathode volts would be a s/c by pass cap or a hefty negative voltage on the grid (pin 5) but I can't see what could cause that - ohterwise I think you must have two dud valves.