10-12-2020, 09:35 AM
(This post was last modified: 10-12-2020, 09:37 AM by Murphyv310.)
Hi.
An early start this morning. I decided to retry the centre tap in the toroid primary but this time directly to 12v +. This dropped the resultant output on the secondary by 15%. Trying a series resistor on the feed and decoupling the centre tap again brought in distortion and lower level, around 300 ohms and lower the distortion cleared up. I've tried another chip just in case the one I was using was faulty but no. So either it's an effect of the vero or the 3.3k's as pins 6 & 12 are in fact the optimal values stated by the manufacturer in the data sheet. I'll leave it as is I think.
An early start this morning. I decided to retry the centre tap in the toroid primary but this time directly to 12v +. This dropped the resultant output on the secondary by 15%. Trying a series resistor on the feed and decoupling the centre tap again brought in distortion and lower level, around 300 ohms and lower the distortion cleared up. I've tried another chip just in case the one I was using was faulty but no. So either it's an effect of the vero or the 3.3k's as pins 6 & 12 are in fact the optimal values stated by the manufacturer in the data sheet. I'll leave it as is I think.
