From: "Terrell W. Fritz"
Date: Sun, 10 Mar 2002 13:49:41 -0700
Subject: Re: [TSSP] short H/D
Hi Bart, I was thining of that but I kind of like that coil :-)) and may use it for some three coil stuff. I really don't want to chop it up. I will probably just go make a new tapped coil. It is not that much harder or anything. I could also use it as a tapped variable inductor which would be useful beyond Paul's test. Cheers, Terry At 12:15 AM 3/10/2002 +0000, you wrote: >Terry - > >The sonotube coil I sent you (the 1:1 sonotube) might be able to be used as is. >It would be a matter of using an exacto knife to slice into the spar varnish >(peels off easily), snipping the wire in predetermined points, making a 90 deg >bend up. Each wire with a 1/4" of protrusion should yield a 1/2" of spacing >between the two. The ends of the wire might be able to be sliced down the >center (it's somewhat large wire) to fit in resistor leads. The only real >advantage is that the rest of the coil is already set in place and held by the >coating. > >Just a thought. May be easier to simply wind a new coil on a Home Depot bucket. >If you do, that carpet tape may still come in handy (if you know what I mean). > >Take care, >Bart > >"Terrell W. Fritz" wrote: > >> Hi Paul, >> >> Sounds reasonable. >> >> I have 24 gauge wire and the taps can be those little clip jumpers they use >> in computers to set hard drives / mother boards and such. I can easily get >> that stuff from DigiKey. I have all sizes of surface mount resistors but >> they make them in all values. >> >> I would propose a fairly large coil to eliminate little defects and such. >> Perhaps a 12 inch Sonotube or a large plastic trash can or something. The >> large cans tend to be a little cone section shaped with the base smaller >> than the top which may be a problem. Sonotube has odd losses but they are >> stable for a short time frame. >> >> Don't mention flat coils to me :o)) I must have fallen down a spiral stair >> case or something as a child. I am just not a flat coil guy. Spinning >> those things drive me nuts and I have no talent for it... Others will have >> to figure that out. >> >> How about a 12 inch diameter Sonotube wrapped to the length of your choice >> with #24 wire and taped say every inch. If you could give me a rough >> resistor value that would help too. I think the taps should be evenly >> space since if they are not, someone may blame the current profile on non >> uniform taps messing with something. I think I have the measurement >> instruments part covered but if there is a special technique you like let >> me know too. >> >> If you could give me an idea of good sizes, resistor values, and such I can >> work on this and get it going. >> >> Cheers, >> >> Terry >> >> At 10:16 PM 3/9/2002 +0000, you wrote: >> >Hi Terry, >> > >> >I'm looking for unequivocal experimental evidence that the current >> >in a resonating coil can exceed the base current by quite a >> >noticeable amount in some geometries. This would provide an >> >experimental answer to Antonio's question to me from the pupman >> >list today: >> > >> >> Can Les be greater than Ldc? >> snip.... >
Maintainer Paul Nicholson, paul@abelian.demon.co.uk.