Hi,

just put a Marshall JCM2000, DSL100 on the bench.

Looks nice .....

3 output valves installed, 6CA7EH ( Electro-Harmonix, 02/12), only one of
which works.

Two, large mirror burn marks on the glass of one of the dead ones, but the
OT and rest of amp seem OK.

Pulled all the 6CA7s and checked the bias voltage on pin 5 of all 4 sockets
= -43V at max setting.

Played hot air onto the PCB near the octal sockets for about 20 seconds and
re-checked.

Pin 5 voltages had dropped to between 28V & 14 V.

Oh **** !!!!!

How did this amp ever survive for this long with such massive PCB leakage
???

The grid feed resistors are all 220kohms too !!!!

Do Marshall actually have spare PCBs for this god awful POS any more ??

What sort of cost delivered to Sydney Australia ?


..... Phil