Banggood "Tube Amp 2" Kit

[ken]

I've just got back to this today. I connected it up, ran it for about 5 mins, then removed one valve. The results surprised me a little. When I pulled the valve both the rhs and lhs channels dropped out then after may be 5- 10 secs one side came back but not the other. Now if one valve is pulled the other loses its heater supply so how can the side that keeps going still it continued to work. When I plugged the valve I had removed back in both channels returned. I perhaps should have pulled both valves to see what happened but I did not think of it at the time. Can I also ask those that have looked at the circuit diagrams provide by Andy and Rob if they can see the connections to the valves or the valves themselves clearly. I can't but I'm running an old laptop on linux using opera as a browser so the problem might be there.

Regards,

Ken.