Hi Lawrence,
Yes, yes, by all means fit dummy loads to simulate the full-load conditions as a final test 'soak', but prior to that, for fault-finding conditions, we only want enough current flowing so that the cct. has something to 'bite on'. If we were to go straight for a full-load test, the consequent currents might just be enough to burn out a resistor, say, that was on the edge of going O/C, or a valve that has a weak gm and won't work properly at its normal, designed Ia, thus adding to the faults we are trying to locate.
I use that approach when I'm testing / repairing switch-mode PSUs, be they for a computer or in a T.V., e.g. the line O/P stage.
As for my health, etc., things are much the same - just trying to cope with the slowly-worsening arthritis; thanks for the enquiry.
Al.
Yes, yes, by all means fit dummy loads to simulate the full-load conditions as a final test 'soak', but prior to that, for fault-finding conditions, we only want enough current flowing so that the cct. has something to 'bite on'. If we were to go straight for a full-load test, the consequent currents might just be enough to burn out a resistor, say, that was on the edge of going O/C, or a valve that has a weak gm and won't work properly at its normal, designed Ia, thus adding to the faults we are trying to locate.
I use that approach when I'm testing / repairing switch-mode PSUs, be they for a computer or in a T.V., e.g. the line O/P stage.
As for my health, etc., things are much the same - just trying to cope with the slowly-worsening arthritis; thanks for the enquiry.
Al.
