As i said in my last blogpost, i started to build the lineair amplifier alongside.
And the first part you make is a AC to 12v DC switch with an LM317.... pretty basic stuff , but proven technology. I build my power supply with a mil spec one.
Anyway.... the supplied 2200uf capacitors are 50v's ones. The schematic says 25v, but they packed 50v's instead.
This offcourse is not bad as 25 is just enough, so a bit more is only a good thing. BUT! the PCB is drilled for a 25v size, not for a 50v size.
So thy wont fit neatly next to each other.... that kinda made me a bit grumpy.... Especially when i found out that the 1uf next to it was too big on the PCB....
So i started to make it fit as nicely as possible... which i succeeded in, but i kinda forgot the 1uf capacitor.. now at this point i needed to start testing.... so i switched on my power supply and started to measure the voltage coming out of the lm317.... it was not what i expected so i turned off the power supply. A big bang was the next thing that happened and the 2200uf was blown :(
Ohh well... tuff luck i guess and a stoopid mistake on my side... this weekend ill get some new capacitors, and ill continue again....
i'll keep you all posted :)
73's
Alex
Sorry to hear that, Alex. Fortunately, you know exactly where the problem is and don't have to troubleshoot a finished kit.
ReplyDeleteAlex,
ReplyDeleteHet zit even tegen zo te lezen. Ga rustig door.
Mijn ervaring is, even opzij leggen.
73, Tjeerd