thank you all for the good documentary - after reading 12 pages I think I know which way to repair my 2 R1000 (this time, repaired internal PSU failed again): external PSU. Maybe someone could help me in verifying my components:
As most DC/DC-Converters have lots of heat loss, I tried to find a converter being able to have more than 1A on the output (for secure startup of the device) and not too much heat loss (don't want to place an external heatsink on the Radio) - available in Germany.
- my favorit: adjustable DC/DC-Converter, output max. 3A, but 29,95 Euros
Traco Power TSR 3-24150 (somewhere between 90-95% effectiveness - I think I won't need a heatsink)https://www.distrelec.de/schaltregler-4 ... daechj010uhttp://www.reichelt.de/index.html?;ACTI ... 2FTSR3.pdf
-expensive one (39 Euro), said not to need a heatsink though only 85% effectiveness
1,5 A PowerTrends 78 SR 109 VC I(out) 1.5 A http://www.conrad.de/ce/de/product/1470 ... Detail=005
- adjustable DC/DC, needing a heatsink 8,95 Eurohttp://www.elv.de/kemo-m015n-spannungsw ... erbar.html
- cheap one (0,61 Euro) needing heatsink:
ST Microelectronics L 7809 CV 9 V I(out) Max. 1.5Ahttp://www.conrad.de/ce/de/product/1560 ... Detail=005
What about this one: http://de.rs-online.com/web/p/dc-dc-wan ... t/4944285/
A flower lot of Pins, but it's even cheeper...
Which one would you choose? Will there be a feelable advantage of the expensive options?
Thank you for your help,