Sony SA-CT60 soundbar component ID

[jssamp]

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.

[SMDFlea]

Re: Sony SA-CT60 soundbar component ID

They`re Gas discharge Tubes for overvoltage surge protection.

[jssamp]

Re: Sony SA-CT60 soundbar component ID

Would you happen to know what the color bars mean?

[R_J]

Re: Sony SA-CT60 soundbar component ID

SPG spark gap. The color bar is the DC spark-over voltage rating. Here is one brand

[jssamp]

Re: Sony SA-CT60 soundbar component ID

Thank you, R_J, I've read up on SPG and it is a perfect fit. Knowing what the component is and what it does is helping me figure out the circuit.