Amps
[Top] [All Lists]

Re: [Amps] turns = henries question

To: Gary@doctorgary.net, amps@contesting.com
Subject: Re: [Amps] turns = henries question
From: Radio WC6W <wc6w_amps@yahoo.com>
Reply-to: wc6w_amps@yahoo.com
Date: Sat, 21 Feb 2009 12:41:52 -0800 (PST)
List-post: <amps@contesting.com">mailto:amps@contesting.com>
Hi Gary,

The coil as you've described should be about 80 uH.

A 3" winding, other dimensions remaining constant, will provide 60 uH.

Calculations performed on an American Hydromath Calculaide Frequency Computer 
(circular slide format), 1955 vintage.

FYI: At 45 TPI, the wire is likely #24 enameled.

73 & Good afternoon,
   Marv WC6W 

http://wc6w.50webs.com/


--- On Sat, 2/21/09, Gary Smith <Gary@doctorgary.net> wrote:

> From: Gary Smith <Gary@doctorgary.net>
> Subject: [Amps] turns = henries question
> To: Amps@contesting.com
> Date: Saturday, February 21, 2009, 11:21 AM
> 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
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps


      
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps

<Prev in Thread] Current Thread [Next in Thread>