[Amps] Bleeder Resistor Inquiry

[R@contesting.com]

On Apr 24, 2005, at 8:21 AM, TexasRF at aol.com wrote:

> Much more can be said about the voltage rating of these power 
> resistors. The
> failure mode resulting from over voltage operation is an open turn 
> (and there
> are a bunch of turns, increasing the probability that one will open).
>
> Why this happens is unknown to me

With finer Ni-Cr wire, more turns, and more V, perhaps a turn to turn 
arc burns the wire open?

> but I have seen it happen in my own ?
> equipment frequently enough that I will not use them any longer. On 
> the other hand,
> many lower powered Metal Oxide type resistors in series have proven to 
> be
> highly reliable; just a bit more work to install.

Indeed, Gerald.  I do not trust higher-value WW resistors at their 
published V-rating.
>
> ...


Rich Measures, 805.386.3734, AG6K, www.somis.org