Forum power Required

Sooo.....
Here is a summery,
I've phoned the power company a few times about our power.
Some things ( anything electrical and on) pick up noise 0800 - 1600. Monday top Friday. UPS systems SCREAM! They sound ANGRY! I've only RMS Multi-meter to check supply so far.
I'm going to buy a Oscilloscope tonight Line-N and Line to E drop 2-5 volts when it happens. Some of our systems are on UPS my home office is 100% UPS even the desk lamps. Sitting room is on UPS. The drawing room is NOT on UPS.

Sundays I use the Drawing Room. The Radio Caught fire. today. this is in the drawing room.

Safe to say I'm not a happy bunny.

Cracked open the Radio it looks like the switch is on the low side of the transformer. so damage to the transformer could result in a short resulting in HIGH Current that has burnt out the components on the tuner circuit. At least from a visual inspection The only damage I can see is to the Tuner Circuit not the pre or power amps.


I intend to take the power company to court as this was reported and no action to rectify the mains was taken ( they have blamed our water supply( OK yeah I also Like LSD Mate Honest ) and the lack of a smart meter as We as we all know the old legacy meters since they lack the ability to be disconnected by the Chinese change the frequency of the supply willy-nilly.


Any one had slimier issue>? Any one have tips into using a Oscilloscope? Thinking some one near by may have a one-to- three phase adaptor plunged( or hard wired) in that is f**king about with the mains frequency and the current pulling current from my caps. Or is that crazy thought>?

We have in the past suffered mains voltage drops to less than 200v during the winter when people turn their heat pumps on, guess this would cause an increase in current flow but frequency drift is another thing altogether.

One time the power company change our single phase and neutral supply to two phases - super bright lights, blown up washing machine and TV. We got compensation to get things fixed or replaced but the time taken and the hassle is never accounted for.

You need something to log your supply voltage and frequency over at least a 24 hour period.

Good luck

WARNING: if you are not competent with both electrical installations *and* detailed oscilloscope electronics, don't even think about using a scope to investigate the mains - in particular a cheap one off t'internet where you don't know anything about the voltage rating of the supplied probes or the input isolation.

You can get an SPD (surge protection device) fitted to your CU to protect your equipment from bursting into flames - however from what you describe I think you might find yourself changing the cartridge a lot.

You haven't got an old TV have you?

If you want to safely record your power supply then a voltage data logger such as this unit would my suggestion
https://www.omega.co.uk/pptst/OM-DVCV.html
It links to a windows based bit of software to provide a clear record of any variations in supply voltage.

QUOTE letric people. We don't belive the validity.
Won't send a bloke with own o-scope.