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Boater Sam · 20th Feb 2017, 1:20 am

The EF89 can be difficult to see the heater glow at the best of times. If the tuning eye works with it in but not with it out, that would suggest to me that it is working!
Are you sure you have the right pins when checking for the heater voltage? If you are checking from the top with the valve out and power on, the pins will number anticlockwise from the gap. If from below, they will be clockwise. Does the EF89 get warm if it is left on for 10 minutes or so?

20th Feb 2017, 1:20 am	#103
Boater Sam Banned Join Date: Dec 2013 Location: Middlewich, Cheshire, UK. & Winter in the Philippines. Posts: 3,897	Re: Tandberg Huldra 8 valve failure The EF89 can be difficult to see the heater glow at the best of times. If the tuning eye works with it in but not with it out, that would suggest to me that it is working! Are you sure you have the right pins when checking for the heater voltage? If you are checking from the top with the valve out and power on, the pins will number anticlockwise from the gap. If from below, they will be clockwise. Does the EF89 get warm if it is left on for 10 minutes or so?