What’s that part?

[MadNat]

I know they are resistors (I’m no sparky ok!)


2 are supposed to be 2.2k and one 10k I think.?! What would my friend need to order as replacements?

Sorry for the basic question!

Thanks

 

[strobey]

What are they for? The only other thing you usually spec is their power rating.

Photo?

 

[Markjduk]

I think you may have answered your own question, 2 x 2.2k resistors and a 10k resistor. If you are unsure of the power rating, let me know what pin they are for and I will have a look.

 

[MadNat]

Just realised the photo didnt come through from my phone

Sorry I should have mentioned - they’re not from a pin. My friend has a PA/Speaker and we’re trying to repair it/

No documentation to provide power rating info unfortunately. They do measure 15mm long (.596"). Does that help? Probably wasting your time.

 

[Judderman]

Just realised the photo didnt come through from my phone

Sorry I should have mentioned - they’re not from a pin. My friend has a PA/Speaker and we’re trying to repair it/

No documentation to provide power rating info unfortunately. They do measure 15mm long (.596"). Does that help? Probably wasting your time.

This should sort you out.

 

[MadNat]

It does sort the Resistance - thanks very much. They are 10k and 2.2k with 5% tolerance.

How can I work out the power rating?

 

[Markjduk]

22k 2 watt & 10k 2 watt I would say looking at the size of them.

 

[Markjduk]

You can take the calculated wattage and multiply it by 2 or even 3 for safety. So if you calculate a 1/8W resistor then use a 1/4W. Going larger will only hurt your available physical space as a general rule.

 

[MadNat]

Ahh got it - we have quite a bit of space being 15mm long.

Thanks for your help [emoji106]

 

[Judderman]

How can I work out the power rating?

Ha-ha - no idea, not even sure what the term means (I'm no sparky, either & I'm going from what I dimly remember from my physics A-level, 40 years ago & don't remember a power rating being mentioned). Is it the max power (volts x amps?) that the resistor can cope with, without burning out? That leads me to V=IR & W=VI, so W = VxV/R. R is now known 2.2k/10k, so does that give me the power rating from the voltage?

Is this right or utter nonsense (for both meaning & calculation)? I'm trying to firm up my knowledge a little here.

Stew

 

[Markjduk]

Ha-ha - no idea, not even sure what the term means (I'm no sparky, either & I'm going from what I dimly remember from my physics A-level, 40 years ago & don't remember a power rating being mentioned). Is it the max power (volts x amps?) that the resistor can cope with, without burning out? That leads me to V=IR & W=VI, so W = VxV/R. R is now known 2.2k/10k, so does that give me the power rating from the voltage?

Is this right or utter nonsense (for both meaning & calculation)? I'm trying to firm up my knowledge a little here.

Stew

Have a look at https://www.robogaia.com/how-to-calculate-resistor-wattage.html

 

[Judderman]

Have a look at https://www.robogaia.com/how-to-calculate-resistor-wattage.html

Cheers Mark - very useful - even my algebra was right