[Amps] [BULK] - Drake L-4B PSU burned resistor

[Steve Thompson]

R.Measures wrote:
> On Oct 31, 2005, at 2:04 PM, Steve Katz wrote:
> 
> 
>>BWH is a molded wirewound device.  Pretty good writeup here:
>>
>>http://n8sfc.com/bwh.html
>>
>>For high surge applications, you don't want conventional film 
>>resistors;
>>they fail under normal conditions.
> 
> 
> The MOF resistors we use in our suppressor retrofit kits are rated by 
> Matsushita at 100-ohms, 3W, 70ºC.  In free air, they will dissipate 12W 
> for one hour with a resistance change of less than 10%.  At 12W, they 
> glow red in a darkened room.
But that's only 35V across them. Many metal film resistors are a spiral 
on the form, and the gaps might arc if hv beyond the rating is applied.

I'm with you all the way on their capacity to withstand overload. I used 
to like the Dow FP2 and FP3 - you could run them until you couldn't see 
the colour codes any more, but they would still be within a few %.

Steve