[Amps] turns = henries question

[Gary Smith]

Gents,

Thanks for the on & off list replies. It appears the schematic has 
lied saying the choke is 60uH, one can only assume why. What does 
exist is the dimensions I mentioned below. I'm assuming as long as I 
have the same number of turns I can use 22 instead of 23 Gauge wire 
and have about the same uH and it will be about the same uH. Unless I 
hear otherwise, that's what I'm going to do. 

Wish I had the smarts I used to have when I was a teenager...

heh...

Gary
KA1J


> Gary,
> 
> To get 60uh on a .676" dia form you'll need a close-wound 
> coil, 45 tpi, about 3" long.  That per my ARRL LCF/Coil-winding 
> Calculator.
> 
> 73,
> Charlie, N0TT
> 
> On Sat, 21 Feb 2009 14:21:35 -0500 "Gary Smith" <Gary at doctorgary.net>
> writes:
> > Hi,
> > 
> > For you math whizzes out there (math is not my strong point)...
> > 
> > I need 60uH for a plate choke. 
> > 
> > The existing coil apparently uses 23 guage wire and the coil form is 
> > 
> > .676" OD. There are 45 turns per inch and the length of the windings 
> > 
> > on the coil form is 4.052" long.
> > 
> > Accdording to wikipedia
> > 
> > http://en.wikipedia.org/wiki/American_wire_gauge
> > 
> > My wire measures .022" so acording to the chart, I call that 23 
> > gauge. Radio shack has enameled wire but the closest guage is 22 
> > Gauge and that measures .025" which also jives with the chart.
> > 
> > I don't know how many turns of the 23 guage on this coil form will 
> > give me 60uH. Can anyone help me out on this?
> > 
> > Thanks,
> > 
> > Gary
> > KA1J
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> > 
> > 
>  
>