Can I use a 40w PSU with a 50w tube ?

[Want2build1]

cut a full day ... no problems ..

obsevations ..

added a mA panel meter to observe tube power output .. stayed constant at 18mA throughout

PSU transistors were getting hot to the touch
Took side panel off the machine and pointed desk fan at it ... stayed cool
Will add extra cooling permanently :)

will keep you updated :)

[Want2build1]

another update ... 40w suply worked ok, the short time it was installed.... and will keep as a backup :)

Fitted the 60w PSU that arrived yesterday ... very impressed with it ... fro Cole-Tech ... ordered fri, arrived Mon, and looks like a decent bit of kit ! :)

1st test output 25 odd mA ... so had to reduce output to 63% to get a safe 20mA (Which I guess , in theory is the max I should push through ? )

done several hours with it so far ... it's cutting approx 40% faster than the original PSU (but I didn't have a mA meter hooked up) ... so all goo so far :)

all happy here :)