The next amp I will be reporting on is a Marshall JCM2000 DSL50.  The amp works but the output valves/ tubes are being cooked.

I checked the EL34 bias current and cannot be adjusted below 90 mA on one side and 60mA on the other.

I put the valves on my tester and they ( surprisingly check out as ok).  Watch out for how I fixed this and I will also put links to where you can find out how to test this on your DSL series amp.

By the way it is truly a super sounding amp 🙂

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