[AMPS] Re: resistance

[Rich Measures]

>
>hi all,
>
>rich wrote...
>
>> If your amplifier arced mysteriously, it might be interesting to measure 
>> the resistance of the VHF parasitic suppressor resistor.  
>
>it is perhaps important to note that an increase in the resistance of 
>a composition resistor (or a film resistor, too) can increase when 
>the resistor gets too hot.  (rich has said this, too.)  it doesn't 
>have to be so hot that it bakes the color bands to new colors.  the 
>point i want to convey is that it doesn't *have* to be a parasitic 
>oscillation that causes this change.  i've seen resistors in dc power 
>supplies increase by a factor of 3 or 4 by chronic overheating, but no 
>smoke was emitted.
>
>73,
>George T. Daughters, K6GT
>
George:  were the damaged resistors parallelled with a 90nH coil of #16 
gauge copper buswire?
Rich...

R. L. Measures, 805-386-3734, AG6K   


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