16-03-2013, 10:33 AM
(13-03-2013, 08:37 AM)Radio Fixer Wrote: What is the source for the resistors? Are they approved back to a recognized standard? I'm always dubious about buying stuff from Ebay be it HK or anywhere else. Whats the point of building in possible future faults to save small bucks?
Gary
Gary, before I order a couple more resistor values, I'm just wondering if you have any specific concerns based on a bad experience of packs from HK.
Certainly the resistors are anonymous, without any paperwork. But if we assume the resistance value measures correctly (in tolerance) which would be grounds for asking for a refund, how might they be defficient? Bearing in mind that although rated at 3W, they will typically be used where a 0.5 or 1w carbon composition resistor was originally specified.
I suppose they might be less stable or noisier than a 'quality' metal film resistor, but probably still better than the old carbon types?
What are the failure modes of metal film resistors?
Many thanks,
Andy
