Nick de Smith wrote:


Checked the main reservoir caps - 6800uF @ 25V
- ESR was 0R2 @ 100Hz, seems pretty much ok...



** That figure would be the cap's impedance at 100Hz.

The ESR value is much lower, maybe 0.02 ohms.

Most ESR testers use a frequency between 20kHz and 100kHz, where the impedance and ESR values are near the same.


..... Phil