Rich says:
>To find out if it was a parasite, measure the value of the VHF
parasitic >suppressor resistors. Much increased ohms with no outward
sign of damage >indicates VHF energy payed a visit.
This leads to a question: Why is there no outward sign of damage? Is it
a pulse type failure, where the energy is large enough to alter/destroy
the carbon comp, but nor enough to cause heating of the case? Is it
something to do with current concentration being different indifferent
parts of the resistor? Is the effect the same on all types of resistor?
It just seems an 'unusual' failure mode - but there may well be a very
good explanation.
73 es HNY
Peter G3RZP
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