torguny
New member
Hello,
Lately I found 46 pcs. ECC83 Telefunken, d.mark, smooth anode in a box of 100. All they looked new, the prints were OK and they had no stains. So I assumed they were new, because, as you know telefunken prints are so easy to wipe. After testing them I found that their Ia (anode current) vary 0,95 - 1,25ma and S is between 1,45-1,65 ma/V. All tubes were marked with two marks on the top. They looked like yellow and blue dots. Can you tell me what these marks were made for? Do you think the manufactorer made them to specify terms of use, or their quality?
Thank you in advance and exuse my poor English...
Lately I found 46 pcs. ECC83 Telefunken, d.mark, smooth anode in a box of 100. All they looked new, the prints were OK and they had no stains. So I assumed they were new, because, as you know telefunken prints are so easy to wipe. After testing them I found that their Ia (anode current) vary 0,95 - 1,25ma and S is between 1,45-1,65 ma/V. All tubes were marked with two marks on the top. They looked like yellow and blue dots. Can you tell me what these marks were made for? Do you think the manufactorer made them to specify terms of use, or their quality?
Thank you in advance and exuse my poor English...
