[Amps] turns = henries question

[Missouri Guy]

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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