[Elecraft] KPA100 smelling....

[Don Wilhelm]

Karsten,

R38 and R39 will get quite warm - they are rated at 3 watts for a good 
reason.
Since you said they were not too hot to hold your fingers on, they are 
operating well within their limits.
The other resistor that gets quite warm is R13.

73,
Don W3FPR

Karsten Eppert (DK4AS) wrote:
> Hi,
>
> I?ve been using my KPA100 for a while and suddenly had a strange smell 
> in my nose - like something being very hot from too many amperes. I 
> opened the unit, could not find anything burnt or molten but found 
> resistors R38/R39 in the final stage hot. I still could touch them 
> without burning my fingers but they were the hottest components I 
> could identify.
>
> Has anybody an idea, how hot these R?s may go or whether they may heat 
> up at all?
>