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Loud hum is likely a missing ground connection and you can check the cable continuity with a multimeter. Very low (power supply) hum is normal. 2nd & distant choice would be a power supply capacitor has failed to an open circuit and you can check this by shunting it with a known good cap of...

I find your remarks defamatory. And false. And if you know they're false then you are lying. Tsk, tsk, tsk. . .

IIRC, 15 Air Changes per Hour are recommended for kitchens but you'd need an airflow meter to check this.

The power rating should be on the alarm system nameplate and can be confirmed by measuring the volume of the transformer and comparing this with the volumes of 230vac transformers of known power ratings from online catalogs. The secondary voltage can be inferred from the voltage rating of the...

Power rating or output voltage?

[/url] Of course, the minds of the experimenters were affecting [their interpretation of] the results.

"Biting the newbie"?

If it takes 8 hours to achieve temp at 3 kW and it leaks 0.3 kw and you use it infrequently (<each 80 hours) it might pay to leave it off. You can use an analog 230v electric clock wired across the heating element to measure heat loss. If the 3 kw heater is on 5 minutes out of every 50...

I had two customers that I had given estimates to (and they declined) call me back after they found out what things really cost. They ordered, ordered!, me to show up on Monday morning at 9AM. Both women. When I didn't show up they left messages how they had ordered me to show up and I...

Now that it's working and for future reference you might want to get a thermistor/thermocouple and a meter and map out pipe temperatures at critical points while the pump is running.

When I has this problem with an IKEA bed I got the strongest, hardest & stiffest wood from the lumberyard and cut a few extra strips. I didn't bother attaching them to the two cloth strips that held the other slats together.

It might make sense if the tub were perfectly insulated. Something that big probably loses ~300w or 1000 BTUs/hr.

The problem with Alien Abduction and Russell's Teapot is that it's not falsifiable, not yet, anyway. There's a place where the sun's gravity cancels out the earth's gravity and so that is likely where the teapot is! :D

You guys are pretty informed, I must say. 8)

What I don't get is how they had those notches stay open long enough to lay the pipe.

You make the horizontal strips into T cross sections with vertical members that go almost the whole span. No floor contact. Two or three screws per slat should do it. It has to do with the strength of material in the shape of a slat. Doubling the width of a horizontal slat doubles the...

I've gotten two more-or-less independent suggestions to use contact cleaner for this device. This symptom doesn't fit with my experience as to dirty pots but I don't fix radios for a living and it's quick and it's cheap and can possibly save me hours. In any case, I'll take voltage...

If the slats themselves sag, putting a vertical strip under most of the length of each will greatly reinforce them, such that the cross section of the composite looks like a T.

The 'sheds' guy is on my ignore list but by quoting him his posts are again visible. This is maybe a software bug that I've seen on other forums. When the conduct of people I meet stands out, I look for a description of them in the DSM-V, but I don't know the UK equivalent of this book...