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DMcMahon · 24th Feb 2020, 3:18 pm

Hi Ricard,

Definitely only 2 HT rectifiers with AC from transformer for the EF804/86 heaters. This is shown in all the TK 819 documentation I have seen and also in the documentation for similar models 820/823/830/920 etc.

I mentioned in one of those earlier posts about the fact that EF86 was not very bright, I will have to have a look to see if I have an EF86 in another of my recorders, if so then will be able to do comparison of brightness level and anode voltage etc and swap the valves over also for comparison.

24th Feb 2020, 3:18 pm	#190
DMcMahon Dekatron Join Date: Apr 2019 Location: Worthing, West Sussex, UK. Posts: 6,603	Re: Grundig TK 819 Any Useful Info Hi Ricard, Definitely only 2 HT rectifiers with AC from transformer for the EF804/86 heaters. This is shown in all the TK 819 documentation I have seen and also in the documentation for similar models 820/823/830/920 etc. I mentioned in one of those earlier posts about the fact that EF86 was not very bright, I will have to have a look to see if I have an EF86 in another of my recorders, if so then will be able to do comparison of brightness level and anode voltage etc and swap the valves over also for comparison.