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 Resistor wattage
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 Return to top of page · Post #: 1 · Written at 8:46:00 PM on 22 February 2019.
Labbytech's Gravatar
 Labbytech
 Location: Perth, WA
 Member since 22 February 2019
 Member #: 2334
 Postcount: 1

Hi there,

Im in the process of restoring a Kriesler stereo 6 11-133b there is a resistor which is visibly burnt out and when I took off and tested it, it became more obvious it was defunct, it is thought quite a long, robust with thick leads too, meaning it should be able to handle a large amount of watts, question how do I know what wattage the new resistor should be made to withstand? is there a way to tell from the mere size of the resistor? any thoughts would be appreciated.
 
 Return to top of page · Post #: 2 · Written at 9:05:44 PM on 22 February 2019.
Ian Robertson's Gravatar
 Ian Robertson
 Location: Belrose, NSW
 Member since 31 December 2015
 Member #: 1844
 Postcount: 2527

The bigger the resistor the more watts it can dissipate.

What the resistor is made of matters too.

A general answer for a general question.....
 
 Return to top of page · Post #: 3 · Written at 9:35:32 PM on 22 February 2019.
GTC's avatar
 GTC
 Location: Sydney, NSW
 Member since 28 January 2011
 Member #: 823
 Postcount: 6803

Are you referring to the HT dropping resistors?

If so, try a 20 watt ceramic cement type resistor if the correct ohmage and you'll probably be in safe territory. Just make sure it gets plenty of air -- not jammed up against another component.
 
 Return to top of page · Post #: 4 · Written at 12:24:23 PM on 23 February 2019.
Robbbert's avatar
 Robbbert
 Location: Hill Top, NSW
 Member since 18 September 2015
 Member #: 1801
 Postcount: 2116

The only 2 resistors that could possibly fit that description (according to the schematic) are R30, 220 ohm, and R27, 1.5k. Other resistors that carry some power are R4, 27k ; R25, 100 ohm ; and R28, 10k, but 5 watts would be more than enough for them.

If the replacement starts smoking, then you have a bigger problem than a mere resistor.
 
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