6 yr old GE Profile Spacemaker microwave oven, no microwaves

Hi...

We have a 6 year-old GE Spacemaker microwave that has stopped microwaving. The fan, lights, turntable, etc all still work - just no microwaves.

a) Is this worth repairing or is replacing the only good option?

b) What would the cost of the tube be, and is this a repair that can be done DIY? I know there's a big capacitor in there I have to watch out for, but other than that?

Thanks Mark

Reply to
mmodrall1
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Reply to
dave

it's probably quite fixable if you just want the satisfaction of fixing it yourself.

Not that they're a replacement for what you need, but I recently saw $39 microwave ovens at Menards. I'm not sure how anybody makes money off something like that.

Reply to
Cydrome Leader

No picture, no sound? Check the faq,

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Michael

Reply to
Michael Black

** Hi Mark,

do you look like Alfred E. Neuman - by any chance ??

.... Phil

Reply to
Phil Allison

Check the high voltage fuse ? Mine got that problem, replaced it with the same fuse from eBay, and now it's working.

(Be sure to discharge the capacitor is discharged ?)

Reply to
cLx

fuse?

do you mean high voltage rectifier- the black thing with two leads?

Reply to
Cydrome Leader

Later microwave ovens often had another black thing with 2 leads, and a symbol on it similar to that for a tranzorb - they frequently fail S/C for no apparent reason, if you're lucky the fuse pops before you get shorted turns on the transformer.

Another cause of blown fuse is the safety interlock switches on the door - 2 of the switches cut the mans, the third is a failsafe that shorts the transformer primary if both the breaker switches weld shut.

Slamming the door shut can cause bounce on the shorting switch - another potential fuse blower.

The most expensive part I've ever bought for a microwave is a bulb, one plus side of living in a flat is the communal bin rooms, microwaves get dumped every now and then, if the dish etc is missing I scrap it for spares. There's a couple of spare microwaves stored in the garage, the most recent find was a fully working (except the bulb) grill/microwave which I took indoors to replace the existing one - but that's not showing any sign of conking out just yet!

If the fuse is blown; pull the wire off the HT tag on the transformer and try another fuse, if that's OK you then have to eliminate the diode & capacitor.

The HT winding is 2kV at 1/2A - it could probably show Old Sparky how its done!!!

Reply to
Ian Field

Imagine a typical 500 watt oven pumping 2400MHZ CW into a directional antenna and aiming it at your food, or your neighbor for that matter. Lenny

Reply to
captainvideo462009

Legend has it the concept of cooking with microwaves came when someone was working on a microwave dish with power going to it, and the chocolate bar iin his pocket melted, showing the value of microwave for heating things.

The legend never says how much power was going into that dish.

Remember though that power drops off significantly with distance. You need high power to bounce a signal off the moon because by the time it hits the moon, the power is miniscule, and made even tinier by the return trip. Benig right next to a high power transmitter can be a bother, ifnothing else it may overload your receivers and audio amplifiers may start rectifying the signal so they act as "crystal" radios, but not that far away, the signal has diminished by quite a bit. The fuss over cellphones is because the power is really clsoe to your brain, even if it was kept on the belt and operated remotely, the power would be significantly less.

Michael

Reply to
Michael Black

Michael Black forklarede:

Instead of having a cellphone tower near the school, people want it far away. Therefore the phones of 1000 kids have to "shout louder" to reach the tower.

Is that the right choice?

Leif

--
Husk kørelys bagpå, hvis din bilfabrikant har taget den idiotiske  
beslutning at undlade det.
Reply to
Leif Neland

No. I mean fuse. Like this one:

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(the current depending of the microwave oven's power)

- c.

Reply to
cLx

All the microwave point to points I've worked on have had transmitter outputs in the hundred milliWatts range. A single dish can have many transmitters multiplexed, but there is nothing approaching enough Watts to heat anything up significantly.

RADAR, on the other hand...

Reply to
dave

There is no RF increase near the base of a tower. The antennas transmit sideways. Downward lobes were eliminated by spacing bays 1/2 wavelength (180 degrees) apart, rather than a full wavelength (360 degrees). The beam tilt determines where the energy meets the ground.

School towers are not dangerous to students, provided they are above them.

Reply to
dave

Never seen those before. Is this a new thing they add to make appliances fail more often?

Reply to
Cydrome Leader

Nothing new at all - the spring pulls the gap open, and hopefully - quenches the arc.

Reply to
Ian Field

Someone actually had a design for a microwave oven magnetron transmitter published on their website.

Last time I looked, it had been taken down.

Reply to
Ian Field

At least one of the ham magazines had an article like that, maybe as much as 20 years ago. Of course, they locked it to a frequency standard thtough some method.

Michael

Reply to
Michael Black

but what for?

If anything goes horribly wrong in a microwave oven, those slow acting fuses on the mains sure do seem to work ok.

Reply to
Cydrome Leader

Wrapped in the standard aluminum foil packaging? How could he carry a chocolate bar in a pocket, without it melting?

--
Anyone wanting to run for any political office in the US should have to 
have a DD214, and a honorable discharge.
Reply to
Michael A. Terrell

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