I have two components on the board that have designator GT that I am unfamiliar with. They look like glass diodes but diodes on this board are labeled with D. My search so far leads me to suspect they might be gas discharge tubes for transient suppression but they don't look quite like any gas tubes I have seen before. I hope somebody will know what they are.
They are about 4mm long and each has different color bands.
They are about 4mm long and each has different color bands.
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