In several schematics such as the F5 circuits there are two parallel resistors specified instead of one. For example two source resistors of 1 ohm 3 W each resulting in 0.5 ohms 6W. Is this better in some way than using a 0.5ohm 6W single resistor?
Thanks.
Nash
Thanks.
Nash
two of 3W have more body than one of 6W
sometimes that means lesser temp. changes
and just sometimes you'll hear difference , especially when Pa is doing dimensioning of parts
sometimes that means lesser temp. changes
and just sometimes you'll hear difference , especially when Pa is doing dimensioning of parts
if voltage distortion is a consideration then two series connected resistors can be a benefit.
This advantage does not apply to paralleled resistors.
If power dissipation is a consideration then either paralleled, or series, or series/parallel all benefit equally from the reduced power, after sharing the loading.
This advantage does not apply to paralleled resistors.
If power dissipation is a consideration then either paralleled, or series, or series/parallel all benefit equally from the reduced power, after sharing the loading.
Resistors are affected by temperature so in a high power position sharing the power, thus reducing heat, might make a difference.
If the resistors are wire-wound type, the combined inductance is reduced in half also. That may affect higher frequencies.
Thanks all for the replies. I didn't realize that inductance could also be reduced.
Surely there must be some cons too? Additional solder joints? How well do each of the resistors have to be matched?
Nash
Surely there must be some cons too? Additional solder joints? How well do each of the resistors have to be matched?
Nash
- Status
- Not open for further replies.