5687 - 6900 - 7119 - 7044
The 5687 is a great little tube and there are so many equivalents and substitutes you'll never run out of tubes to try with this series!
Compatible equivalents & substitutes: 5687, 5687WA, 5687WB, 5687WC, 6900, 7119, 7044, E182CC, CV2578.
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