Author Topic: Question on Resistors (Compound)  (Read 862 times)

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Offline codemonkeyrawksTopic starter

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Question on Resistors (Compound)
« on: July 18, 2018, 04:05:02 am »
I have a quick question about Metal Oxide Resistors:

A repair project (amp) I am working on calls for a 3W (10Ω RSS P type) Metal Oxide Resistor. Looks like it needs to be around 200 F at most I was curious what the "RSS P-Type" is referring to. Does anyone know where I might find two resistors in matching up.
 

Offline Jwillis

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Re: Question on Resistors (Compound)
« Reply #1 on: July 18, 2018, 05:39:15 am »
RSS are small sized metal oxide film resistors.Metal oxide handle higher temperatures than carbon or thin film . For example a 1/2 watt RSS is the same size as  1/4 watt RSF. I believe P type resistors increase resistance as the temperature rises.  So really what your looking for is  3 W metal oxide resistor in a smaller form than a standard.

 

Offline codemonkeyrawksTopic starter

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Re: Question on Resistors (Compound)
« Reply #2 on: July 18, 2018, 01:11:10 pm »
I think I will see if I can find some online (tricky to find) - I could see this because of the tight spacing on the board I am working on and when I measure a few other's that are similar the temp sits around 160 F but they are also +73V and -73V rails vs being on +2V rail on the final output but at a high current.

My best guess is that this acts as an overload : https://www.manualslib.com/manual/1132095/Alto-Pbm8-250-Mkii.html?page=16#manual - (R1_22) back into the circuit or a final filter stage.

Thank you!
 


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