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

AdrianH · 17th Jun 2021, 10:48 pm

The metal based valve has a heater resistance of 44 Ohms cold so a slight difference between the two. This is more difficult to see into as the top is a lot darker from the getter firing.

Adrian

17th Jun 2021, 10:48 pm	#5
AdrianH Octode Join Date: Mar 2020 Location: Blackburn with Darwen, Lancashire, UK. Posts: 1,573	Re: Identifying vales help Mazda/brimar/? The metal based valve has a heater resistance of 44 Ohms cold so a slight difference between the two. This is more difficult to see into as the top is a lot darker from the getter firing. Adrian __________________ Asking questions and learning, or trying to! Youtube EF91Valve