Guineafowl's latest activity

Thanks! I did have CT surgery about ten years ago. This is more a side-issue of deep thenar pain, maybe tenosynovitis or basal joint...

I found some 1 mm##^2## magnet wire. My LCR meter (actually an ESR meter with L as a side function) is quite limited, so I ended up with...

Thanks - I’ll get on with building the inductors when I get a chance. I have adjusted the probes using the CAL terminal, and they were...

The ferrite toroids have arrived. Should they be wound with magnet wire, and what size, or could I use the existing rubber single flex...

Got it. Trace 1 to show CH1+CH2, invert 2 to get CH1-CH2.

Fluke manual. https://media.fluke.com/c3705bf5-ce6e-4b79-8f55-b10800bf4fdc_original%20file.pdf

Yes, it’s been two house moves since I last saw the Hameg manual. As I remember it, the ADD/CHOP button selects dualling options: ADD...

I’m not sure either of these have the subtract function, but willing to be corrected. My earthing is TN-S, ie N and E linked at the...

One final problem: the VFD output is mains-referenced, so connecting the probe across phases will trip the RCD. Unless the motor earth...

Cheap and cheerful, I’m afraid: https://www.aliexpress.com/item/1005006427487406.html I have a Hameg HM203-5 20 MHz CRO, and a...

Thanks - I see the difference between an RC LPF and the snubber. I’ve ordered a 20-pack of ferrite rings at those dimensions, and have...

Here is a crude first guess at what you need. It has max attenuation at VFD 3 kHz, 0 dB at 50 Hz. The motor model is a guess, now...