UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

frsimen · 20th Oct 2011, 7:56 pm

Andrew,

Ah, the works as a lash up, but not when tidied up syndrome! When you said you lengthened the leads, I wonder if you have increased the distance between the LM386 and the 220uF capacitor? The capacitor must be connected close the the LM386, otherwise there is a risk it will oscillate. The other thing to watch is that you keep the output (loudspeaker) wiring away from the input. Sort those issues out and it should work well again.

Paula

20th Oct 2011, 7:56 pm	#73
frsimen Heptode Join Date: Jan 2011 Location: Croydon, London, UK. Posts: 773	Re: Toshiba IC70 Andrew, Ah, the works as a lash up, but not when tidied up syndrome! When you said you lengthened the leads, I wonder if you have increased the distance between the LM386 and the 220uF capacitor? The capacitor must be connected close the the LM386, otherwise there is a risk it will oscillate. The other thing to watch is that you keep the output (loudspeaker) wiring away from the input. Sort those issues out and it should work well again. Paula