Tube head help!

Hi! I have a small amp head. A Marshall dsl1 and it doesn’t have a stand by switch. I don’t know if it needs 1-2 minutes for the tubes to be warm before open the volume and play. Does anyone have an idea? Thanks

This? DSL1C -

The manual doesnt mention any warm up time

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Yes indeed. I just read it. Thanks a lot @RobDickinson :pray: