|
"¼ the size of what they are replacing, and will most likely last much longer!"
Also, a certain bridge to Brooklyn is 1/4 the size it used to be, but carries as much traffic.
If they are that much smaller, they will run that much hotter. Its the laws of physics.
Because they are hotter they may well not last any longer than the old ones.
But worse ... being hotter, they are more likely to damage other parts close to them.
You need to space the new ones out so that they are centered exactly where the old
one was. Even then the spot directly above them gets hotter.
In general, if an old resistor is rated more than 1/2 watt, I make sure the new one
is roughly the same size, even if much higher rated. If the old one was 1/2 watt,
I just check and make sure the new one is running at less than 1/3 its rating, and is long enough to take the peak voltage across it. Of course lots of old 1/2 watt carbon resistors were run at far less than 1/2 watt.
|