Couldnt find my previous thread on this so started anew.
Finally cracked it tonight.
One of the bias pots legs hadnt been soldered.
A light knock on the board and the bias pot went o/c and applied full bias to teh output transistors and blew them up.
Just a little sad I didnt spot it earlier.
However i have built up 30 boards with well over a hundred joints on each and this was my first mistake.....
Finally cracked it tonight.
One of the bias pots legs hadnt been soldered.
A light knock on the board and the bias pot went o/c and applied full bias to teh output transistors and blew them up.
Just a little sad I didnt spot it earlier.
However i have built up 30 boards with well over a hundred joints on each and this was my first mistake.....