>I have been paging thru the new Newark catalog and came across a few
>interesting items that are "new" to me.
>
>Ohmite 50 and 100W non inductive resistors, including 50 Ohms. The caveat
>is that they give an inductance rating! That would lead me to assume
>that they are not HF RF rated but maybe for LF, audio and switcher
>supplies. Anyway the 50W is rated at 0.8uh and the 100W at 1.6uh.
>Has anyone experimented with these at HF, tuning out the XL, etc. ? The
>prices are a reasonable $9.19 and $16.81 respectively.
>
There is no such thing as a non-inductive resistor. The resistors we use
in the suppressor retrofit kits (100 ohm, 3w Matsushita, MOF-type) have
about 10nH - according to Wes, N7WS. The longer the resistor, the more
L. A 100 ohm 100w globar-type has roughly 100nH [0.1uH]. At 28MHz, this
amounts to only 17 ohms of X. However, 1.6uH [1600nH] would be a bit
much L, methinks.
R. L. Measures, 805-386-3734, AG6K
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