Hi all ,
I found in old german magazine - ELRAD - this ancient project , may be an semiclone of BGW1000 , it could be the project that was the basis of Elektor PA300 from the same author, Anton Riedl.
I hope not to infringe copyright, otherwise ask the moderator to censor my attachment.
Enjoy !
Attachments
In the PDF above I described how I solved the cooling problem. it was done similarly in the original article.
I used four crappy and cheap heatsinks, about 300mm x 100mm x 30mm with vertical fins and mounted them as the four side walls of a "tunnel" using L-shaped bars. Then I mounted 3 devices on each heatsink and a big powerful fan at the front side. Using a fan increases efficiency of a heatsink so much that you can really use those tiny heatsinks even for continious full output power.
If you want to use the amp at home and don't like the idea of a fan making background noise, you can rely on the fact that you probably don't need continious full output power. It's a class AB design after allHave a look at the photos in the original article of PA-300. The heatsink shown there is at the limit, but definitely enough for home use.
hi oliver, this amp do not need an inductor in series with the output?
