I did other tests including checking input volts to the IC, and there was still plenty of headroom there, the volts on the smoothing cap had dropped to just over the RMS volts from the transformer, which was 16 volts
I used a massively overrated transformer for these tests to ensure there was no possibility of the transformer voltage sagging.
No I am certain the current was being limited by the regulator at just over 1 amp, in other words they are\NOT 5 amp regulators
I have ordered 2 more LM338T regulators, these look different to the first lot, They are branded as National Semiconductor and have V4 stamped in a small circle on the body just over the ADJ pin.
The faulty/fake ones have MJC stamped in a small circle in the body just over the OUT pin.
Mike
I used a massively overrated transformer for these tests to ensure there was no possibility of the transformer voltage sagging.
No I am certain the current was being limited by the regulator at just over 1 amp, in other words they are\NOT 5 amp regulators
I have ordered 2 more LM338T regulators, these look different to the first lot, They are branded as National Semiconductor and have V4 stamped in a small circle on the body just over the ADJ pin.
The faulty/fake ones have MJC stamped in a small circle in the body just over the OUT pin.
Mike
