I constructed my k8060
At first i didnt had any colophony…and i had to solder all resistors without it, and after I over-soldered them so the looked perfect…everything else was soldered perfectly too…
it should run on my toroidal transformer 120va 2 x 30v / 2 x 2.00a, and it has all right colored wires, i attached them like it was said in the manual…and every time i try to start it by plugging on, the fuse blows…
There must be some assembly problem and/or the power transistor are already damaged.
ok i’ll try to assemble it all again…if this doesnt help then i’ll probably have to replace power-trans’s…
Check other posts on this item.
Make sure to test circuit with lightbulb in series as indicated in manual.
I have just joined the forum. I tried to get the K8060 kit to work some months ago, but gave up as it kept blowing the fuse. I have now built a lot of chip amps and modified Class D amps, and with the knowledge that I have gained thought I might be able to get it working. Answer…No…the light bulb still shines brightly !
I am not using a Velleman transformer, but a 120va 30+30. I cannot see why the tags on the board are marked AC and AC0, when the suggested transformer is a dual secondary without a centre “0” tap ?
How can you get the wires round the wrong way ? Both secondary’s carry 30v AC.
I see that you suggest checking the power transistors in nearly every post that has had this problem. Are they mostly faulty ? I will desolder and check mine, but would be intersted in your answer to the way the tranny is wired.