Re: Looking for help to fix power supply
Posted: Tue Oct 20, 2020 9:46 pm
Martin Walker wrote:jjlonbass wrote:I would say that the 6800 uF smoothing capacitor is most likely duff. Even if your 'scope trace was to scale, around 1.5V of peak-to-peak ripple is excessive.
That was my first thought too.
Me too. It was probably fairly marginal when new and getting worse with age.
The diode data sheet is at
https://www.mouser.co.uk/datasheet/2/11 ... -70454.pdf
which shows they are 6 amp diodes.
The parallel caps are probably 100000pF (100nF or 0.1uF) as the first two numbers are the value and the last number refers to the number of zeros after the first two numbers and this is usually measured in pF.