[Amps] Guidelines.....toroids for tank ckts

[John Lyles]

Peanut butter at least has low magnetic loss tangent. I would think it would have a high and unstable dielectric loss tangent as it heats readily at 2450 MHz.  Sometimes I heat it to get it flowing again, after being refrigerated. The cheap plastic jars around here have that foil seal on the lid. When it is opened, undoubtedly there is a metal strip remaining on the edge of the jar. When I stick that into my RadarRange, it always arcs and sparks, dang it.  
73
K5PRO



> Date: Mon, 26 Mar 2012 00:44:15 +0000
> From: Manfred Mornhinweg <manfred at ludens.cl>
> Subject: Re: [Amps] Guidelines.....toroids for tank ckts
> It might be rather lossy. The resistive permeability might be larger 
> than the inductive one. But once the jelly is hot, eat it, it tastes 
> good when hot. That will leave you with a high-Q donut.
> 
> A year ago I was on a trip on a sailboat, and the autotuner of my TS-450 
> absolutely didn't want to tune up the backstay on 80 meters. So I wound 
> a loading coil on a peanut butter jar. A few days later we ate the 
> peanut butter, forcing me to move the turns a little closer together on 
> the empty jar, to maintain proper resonance. There didn't seem to be 
> much difference in performance. Peanut butter has low permeability, and 
> apparently pretty low loss too.