Guineafowl's latest activity

D777 lofted about 2.5m higher, and not much better. Discone?

Yes, I’ll get a pole to loft it higher. As I say, the broomstick (positioned lower down, as you can see) did receive the odd marine...

Would it be correct to call the D777 a vertical whip? It’s not working any better than the dipole, so do I take from both the above...

I’m mainly interested in the 120 and 150 MHz ranges, for now. A Discone antenna will apparently cover more frequencies, but looks at...

I live about 3-4 miles from the Moray coast, elevation 24m, and within 20 miles of Inverness airport and an RAF base, so picked up a...

If in V/f mode, as you state, the VFD will automatically lower the output voltage as you drop the frequency. As far as I can see...

I agree, set the motor rated voltage to what it says on the plate. For the 600 rpm mode problem (and maybe the others), It might be...

As you say, the motor plate doesn’t tell you much. Is it still limited to 30 Hz speed?

I can’t open this. I’ve had a look through the manual. I assume this drive was new, and not secondhand, and for the US market...

If you haven’t input the number of poles (12), then the drive shouldn’t be able to display an accurate speed, so I assume the output...

You had it right here: This means a VFD should tolerate running a much smaller motor, so higher-resistance windings, than it’s...

You’re right about the megger. I’d normally do a check as a general precaution on any old motor, especially if I’ve been fiddling with...

Re: windings, I’d be checking the insulation resistance, if you have access to a megger. Sanity check - does the VFD output voltage...

Thanks for that link. We have a couple of similar websites here in the USA: https://www.owwm.org/ and vintagemachinery.org.

The four-speed motor is quite an impressive feature, given the more common pulley arrangement for speed changes. There’s a short article...