Fender Blues Jr Dead on Arrival
A Fender Blues Jr Mk III arrived in the workshop. It was dead. The amp was opened up. One EL84 output valve was completely destroyed. The other had most of the getter gone in the valve , suggesting long hours of use. The white material inside the valve indicated a slow gas leak that eventually killed the valve. The EL84 failure had blown one of the screen resistors on the main pcb and this resulted […]