On 11/29/14, 10:36 AM, David Robbins wrote:
You want some lossy coax? I have a couple old rolls where both the center
conductor and shield are nichrome. VERY lossy stuff!
What would they use nichrome coax for? Some sort of test jig for heating?
For use in a refractory or corrosive environment? I think I've seen
hastelloy or something other superalloy.
I've seen stainless steel coax for cryogenic applications (very low
thermal conductivity going in and out of a dewar), but it had a thin
silver plating. For microwave frequencies, the plating was thicker than
skin depth.
I've also seen delay line coax, where the center conductor is a tight
helix: the inductance/unit length is high so the propagation speed is
slow (and the Z is high, too). That stuff was quite lossy, although not
in a "dB/wavelength" sense.
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|