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Resistor Question

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F1nut

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SILVER-7 TUBE AMP

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Post Thu May 15, 2014 11:16 pm

Resistor Question

Ok, so I've got some emitter resistors in an old SS amp that I need some help identifying.

Marked on two separate lines as follows;
M2 0.5ohm
Noble 02

They are axial with a white ceramic tubular body, which is about 5/8" long and 1/4" in diameter. Obviously they are 0.5 ohm and I think they are 2 watt, but I'd like to be sure. I called Noble who was absolutely no help, said they are too old. Is anyone familiar with these markings?
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hewlew1

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Post Fri May 16, 2014 9:11 am

Re: Resistor Question

Since noble said they are to old and cant be of assistance . I would throw in a .5 ohm 5 watt ceramic resistor and call it a day.
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radioeng2

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Post Fri May 16, 2014 12:14 pm

Re: Resistor Question

You could also measure the voltage drop if you're functional and calculate the wattage dissipated. Then throw on the typical "more than X 2" headroom required for the continuous duty. It's nice to let a resistor run at less than half it's capability.

Mark
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F1nut

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SILVER-7 TUBE AMP

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Post Fri May 16, 2014 12:59 pm

Re: Resistor Question

I found the schematic. They are 0.5 ohm, 2 watt.
Political Correctness...defined

A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end.



In a recent press conference, President Obama remarked, "If I had a city, it would look just like Detroit."

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