On Fri, 4 Mar 2016 04:31:49 -0800 (PST), Phil Allison
wrote:

wrote:

Here is the Schematic: http://komkris4000.webs.com/lk150%20schematic.gif

It is eating the 150uF @ 75V filter caps - I replaced the OEMs first with 75V, 105F caps, they lasted about 20 hours. Then 100V, they lasted about 30 hours. The manifestation is increased HUMMmm, and the caps start to swell.


** That schem looks wrong.

No way 75V electros should be fed from a 100V AC winding.

75uF @ 150V is more like it.

Is the secondary tapping really 100V rms ?

The hand written " -31 " is wrong too, should be more like -45V.


.... Phil

It's possible that the original rectifier wasn't a silicon diode, and
that an inaccurate replacement has been used.

Should be easy enough to measure the voltage on the caps to determine
stress levels,

RL