From: mystuffs@orwell.net (Metlicka Marc)
Date: Fri, 29 Dec 2000 10:21:16 -0500
Subject: Re: [TSSP] coil measurements
paul, i tried to take some L measurements, but i'm not real secure in the correct nature of these readings. i don't have a manual for the 250 de yet but i'm working on it. i can get a true reading on a known standard but these settings won't match the coils, without knowing the proper setup ?. on the 3k coil, my turns counter was at 30001 when i stopped, then there is 4 wraps in a spiral up the remaining form. i'll keep trying to get a series of R readings with all my test equipment and then maybe we can get a standard from that. and i'll keep trying for an L reading. the #4 coil was given to me last night so use it if you want to, the 10-1 is still set up in it's test position, if you want to concentrate on one at a time i'll setup whichever and duplicate the readings, then we can go from there. marc Paul wrote: > Marc, > > I'm still working on your results. > > Using inductances calculated by estimating the turns from the > Fluke 87 resistance measurements, I get for the first three > coils: > > #1 h/d=9.0, Ldc = 19.0mH > > #2 h/d=10.0, Ldc = 40.7mH > > #3 h/d=4.6, Ldc = 338.8 mH > > Are you able to measure the actual inductances with the coils > in their test positions above the ground plane? You might find > the measured values are a little less than those given above. > > I've not bothered looking at the #4 coil as I believe you > are going to return it. > > Cheers, > -- > Paul Nicholson, > Manchester, UK. > --
Maintainer Paul Nicholson, paul@abelian.demon.co.uk.