by Sanita Kuyper | Oct 15, 2026 | Blog
A valve datasheet describes a particular manufacturer's valve under stated conditions. Read the exact model and suffix before comparing numbers: a family label alone does not make every historical or current version identical. Begin with the document and the base...
by Sanita Kuyper | Oct 15, 2026 | Blog
E88CC and 6922 are commonly paired designations, but a tube-family label is not a blanket substitution approval. Check the exact valve, its manufacturer’s data and the amplifier’s requirements. A nine-pin base alone does not establish compatibility. This Glass Audio...
by Sanita Kuyper | Sep 10, 2026 | Blog
GLASS AUDIO | VALVE NOTES Glass Audio newsletter | Issue 1 | September 2026 A valve is not merely a glowing ornament. It is an active component, and the right replacement begins with the circuit. This issue answers the questions that appear...
by Sanita Kuyper | Sep 3, 2026 | Blog
There are two kinds of people.The first kind sees an old glass tube.The second kind immediately turns it around to check the valve number.If you are in the second group, welcome. You are among friends.Why vacuum tubes still matterFor many music lovers, musicians,...
