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And they are not "continuous" like oscillators. They operate in pulses.
When the input voltage goes down, the power goes down a lot. For here, 120vac is the norm but lower that to 100vac and there is a BIG difference in the cooking power.
That's because the heater voltage goes down accordingly, so the magnetron doesn't run properly.
As for 'inverter' ovens - they are light to carry, and that's the only advantage.
Repair wise they are a complete disaster, every one is scrap if it goes faulty. The normal failure in them is the magnetron, but in every case I've seen it takes the PSU with it - and while the mag is expensive, the PSU is really expensive.
You mean less weight so when you lift it it is easier to lift and carry to a new location? What makes it lighter?
I havent had to repair one yet but noticed they dont give an option to turn off the beeping so it requires internal modification to get it quiet.
Yes, what makes it lighter is removing the massive (and heavy) mains transformer, and replacing it with a SMPSU.
The mains transformers were seriously reliable, the SMPSU's die at the slightest provocation
I don't recall any microwave ovens having that option?.
Yeah i an hoping it lasts as it was more expensive than my last 100 microwaves (ok just three i think before this one)
Two of mine had a button sequence to turn off the beeping. One (really old one) was an Emerson, the other was a Sharp. Both long gone now.
In case you want to look for one, you can find out in the manual as i am sure you know, and sometimes they post the manual on line somewhere so you can find it and look in the manual to find the button sequence. It's been a long while now but the Sharp had some button sequence and i had to hold one button in for a few seconds if i remember right. If the house 120ac power went out though i had to do the sequence all over again when it came back on.
I would bet that you just never had to do that, that's all. The beeping bugs me so i like to turn it off or defeat it some other way.
You mean with the flipping digits like the old digital alarm clocks?mechanical digital clock
You mean with the flipping digits like the old digital alarm clocks?
It's a more expensive way to make a PSU.
Mine 'dings' - it's an old Toshiba, and has a mechanical digital clock - so no beeping noises
And they are not "continuous" like oscillators. They operate in pulses.
However, they would be completely unsuitable for WiFi.
I supposed you could amplitude modulate it, for what that is worth but frequency probably does not vary that much.
Wow havent seen an oven like that in a long time now. I suspect it is low power?
it has been done and varies well enough for ATV which is reasonably wideband ...
I do have the paperwork for a project presented in 73 Amateur Radio mag of some years back, that an amateur radio op used for doing ATV on 2.4GHz using around 500W microwave magnetron
Dave
It's 650W, as were all ovens of that time (about 35 years ago) - I'm fairly dubious about the claims of modern ovens, I suspect mostly the increased power (800 or 900W) is imaginary, and obtained by a different method of measurement.
The oven i have now is rated for 1200 watts cooking power and i estimate the input current at around 16 amps. I never use it at that power though i always set it much lower because the line cant really take 16 amps here as there are other things plugged in and in the summer months the line voltage gets pulled down quite a bit too so i wont get full voltage anyway.
Hi,
Sorry for the delayed reply
You don't get domestic ovens that powerful over here, and commercial ones are simply two domestic ovens in one box - so two magnetrons (and everything else) for double the power, with a single control system.
Obviously over here we can get over 3000W from a standard mains socket, so we aren't as power limited.
Power testing is simple, and is commonly done as part of the servicing procedure - this site explains how to do it.
http://www.celtek-electronics.com/microwave-leakage/microwave-oven-power-test