im not lazy i searched for about 2 bours and i found the original telefunken modul schematics and some others, so i have schmatics for a 24v psu.
probably i asked wrong. i search for a schematic that other people use with their siemens w295 or other compareable gear and its well tested. and it should be simple, not like the telefunken psu.
but if this post ist disturbing, delete it. :wink:
Depending on your current draw, you may want a larger first reservoir capacitor. The 1000uF is fine up to some 200mA or so - if you use more current, add more capacity.
Also, the second 100uF capacitor, is a bit large - the regulation in the 78XX's don't really like to look into too large a capacitor at their output. A 1-10uF would probably make the circuit more stable...
[quote author="gyraf"]
Also, the second 100uF capacitor, is a bit large - the regulation in the 78XX's don't really like to look into too large a capacitor at their output. A 1-10uF would probably make the circuit more stable...
Jakob E.[/quote]
Thanks Jakob, that's actually something I always wondered about. Is it the same with TL317 or TL783 regulators?
[quote author="Rossi"]
Is it the same with TL317 or TL783 regulators?[/quote]
Yes, I believe it is..
Though on the G9 HT psu, I have a second, large, reservoir capacitor after the '783. But this is AFTER a 470R resistor - so it shouldn't influence regulation..