Do they loose “grunt” with age? It seems that my old clunker is taking longer to heat up my morning bowl of muslie to the required temperature.

bob(from black rock) said:

Do they loose “grunt” with age? It seems that my old clunker is taking longer to heat up my morning bowl of muslie to the required temperature.

There’s a lot of them tossed out on the side of the roads.

• Do they loose “grunt” with age?

Every now and then you have to tighten “grunt” up …

roughbarked said:

bob(from black rock) said:

Do they loose “grunt” with age? It seems that my old clunker is taking longer to heat up my morning bowl of muslie to the required temperature.

There’s a lot of them tossed out on the side of the roads.

But that could be cos they have stopped working, but more likely ‘cos the “Lady of the house” wants to spend more of the “meal tickets” money.

they do, the magnetron valve – reduced cathode electron emission with age.

bob(from black rock) said:

roughbarked said:

bob(from black rock) said:

Do they loose “grunt” with age? It seems that my old clunker is taking longer to heat up my morning bowl of muslie to the required temperature.

There’s a lot of them tossed out on the side of the roads.

But that could be cos they have stopped working, but more likely ‘cos the “Lady of the house” wants to spend more of the “meal tickets” money.

you know this isn’t the 1950’s right?

Arts said:

bob(from black rock) said:

roughbarked said:

There’s a lot of them tossed out on the side of the roads.

But that could be cos they have stopped working, but more likely ‘cos the “Lady of the house” wants to spend more of the “meal tickets” money.

you know this isn’t the 1950’s right?

Shit No, what the fuck happened? has St Kilda won another Flag?

thermionic valves have a cathode, which is heated either directly or indirectly, which produces a space charge of electrons, these electrons are what flow to the anode, though in a megnetron valve there’re resonant cavities, which with the various fields results in (self oscillation I suppose) a radio wave output ~2.45 gigahertz without any external mudulation (no grid input).

something ike that

And for a while the microwave oven tricked astronomers into thinking they had found a signal.

bob(from black rock) said:

Do they loose “grunt” with age? It seems that my old clunker is taking longer to heat up my morning bowl of muslie to the required temperature.

I have the exact opposite problem. My now discarded old microwave oven heated food at least 20% faster than my new one, despite the new one having 1000 watts as against 700 watts for the old one.

In my case, most of the problem with the new one is that the vent fans don’t seem to work properly. Water in the food is evaporated, condenses on other parts of the oven, is re-evaporated, and the energy spent in re-evaporation robs the food of most of its energy. Another part of the problem may be that the interior of the new oven is larger and doesn’t appear to be as well shielded.

Dirt build-up inside an old microwave oven will rob the oven of some of its energy, as the microwaves heat the dirt rather than the food.

So my guesses in order are:
1. Is the space between the vent outlet and the next object at least 3 cm?
2. Are the vent fans working? Check the interior of the microwave for condensation.
3. Is the interiour of the microwave oven spotlessly clean?
4. Your magnetron might be going. In the old days magnetrons could develop an instability that robbed them of power.