19-07-2020, 05:53 PM
Thanks Rob.
With V3 in place does the hum return.
To test for ripple switch the input (X) on your scope to AC , turn the scope to the highest position and clip the probe on the positive of the cap (C4 and then C14) power up the amp and adjust the input till you see the ripple on the screen, you'll need to adjust the sweep and trigger to lock it up.
With V3 in place does the hum return.
To test for ripple switch the input (X) on your scope to AC , turn the scope to the highest position and clip the probe on the positive of the cap (C4 and then C14) power up the amp and adjust the input till you see the ripple on the screen, you'll need to adjust the sweep and trigger to lock it up.
Cheers.
Trevor
MM0KJJ. Member of, RSGB, GQRP, WACRAL, K&LARC.
Trevor
MM0KJJ. Member of, RSGB, GQRP, WACRAL, K&LARC.