What about using a string of 3 LEDs? Maybe 3 white ones?^^^ That's where I learned this tip.
If I did go down either the Zener or the LED route then can I not just delete the 33uF caps?
Thanks again
What about using a string of 3 LEDs? Maybe 3 white ones?^^^ That's where I learned this tip.
Also looks worth reducing the 100R resistor to 68R, pushing the setting pin current up to 20mAone low voltage zener will have a lower dynamic impedance whn run at c 10mA. The cap in parallel only helps : )
Without a lab PSU I cant see how I can measure the Zeners. Any suggestions?
As a further development on this PSU I've recently replaced each of the Zeners with 5 large green LEDs, giving exactly 10.7V and 12V at the rails. The Zeners will not be going back.one low voltage zener will have a lower dynamic impedance whn run at c 10mA. The cap in parallel only helps : )
Thanks, good to know.Don't bother, green are lowest noise. Assuming they're not just in a green lens.
Thanks Simon, yes please. Might be the case that what I have now is just as good. Only one way to find out.When Joachim and Co were designing the paradise they tested a whole range of options for the ccs in the shunt, of all the topologies tried the leds had the lowest noise and the quietest ones were the 2mA kingbright pale green. I can look up the part number if you want, I'll have it on file