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livefornow851

54 posts

Master Geek


#192363 8-Mar-2016 13:13
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Hi there.

 

 

 

I am repairing an amplifier and have sourced replacements for most parts except for one of the resistors. The colour code does not conclude with any matches when using online tools. The resistor has likely been damaged and does not read with a multimeter.

 

 

 

From what I can see, it has four visible bands but has a space for an extra one/two. Red, Black, Grey (could also be faded black), Gold. The closest match I can find is a 20ohm E24 resistor. Would somebody mind looking at the picture and confirm that this is what is likely.

 

 

 

https://cdn.geekzone.co.nz/imagessubs/7b191f03454416a98b71d52e3ef32379.jpg


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ubergeeknz
3344 posts

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Vocus

  #1508739 9-Mar-2016 11:11
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livefornow851:

 

The resistor is currently open circuit and a multimeter is no help, cheers for the advice, I agree it is most likely 20ohm.

 

So it turns out that finding a 20ohm 1W resistor in the right is pretty hard. The resistor in the picture measures 15.8mm in length and 4.5mm in diameter suggesting 1W. If I were to obtain a 20ohm 5W would that have bad any effect on the circuit? or am I best to join two 10ohm 1W in series?

 

My electronic knowledge is somewhat limited when it comes to component wattage.

 

Cheers for the advice.

 

 

If you can fit a 2W or a 5W that would be fine (5W are usually pretty big tho).  So would 2 x 10 ohm 1/2W or higher in series because each one will dissipate half the power. (edit: corrected)


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