[AMRadio] coils


Edward B Richards zuu6k at juno.com
Sun Jan 8 23:27:00 EST 2006


Thanks, Brett.
I understand that RF only travels through the very outer layer of a
conductor, called "skin effect", so thickness does not matter, just
surface area. BTW, are you going to silver plate or spray some kind of
clear-coat on your coil? 

73, Ed Richards K6UUZ
Simi Valley, Ca 93065
Home of the Air Force 1 pavilion

On Sun, 08 Jan 2006 21:33:42 -0500 Brett gazdzinski
<Brett.gazdzinski at mci.com> writes:
> I don't know.
> I had no problems with kinking, and I think the stuff I used was 
> thick
> walled.
> They make springs you slip over the tubing to bend it without 
> kinking, but I
> did not need it.
> The more copper, the less resistance, so try the thick stuff.
> 
> Brett
> N2DTS
>  
> 
> -----Original Message-----
> From: amradio-bounces at mailman.qth.net
> [mailto:amradio-bounces at mailman.qth.net] On Behalf Of Edward B 
> Richards
> Sent: Sunday, January 08, 2006 8:46 PM
> To: amradio at mailman.qth.net
> Subject: Re: [AMRadio] coils
> 
> Hi Brett;
> 
> I am going to wind a pi section tank coil from 1/4" copper tubing
> tomorrow. Mine will be 4" in diameter and 3" in diameter. Which 
> tubing is
> best (no kink) thick or thin? Thanks.
> 
> 73, Ed Richards K6UUZ
> Simi Valley, Ca 93065
> Home of the Air Force 1 pavilion
> 
> On Sun, 08 Jan 2006 18:48:57 -0500 Brett gazdzinski
> <Brett.gazdzinski at mci.com> writes:
> > If it does not need to be real small, one way to get a good coil 
> > is to wind one out of copper tubing.
> > Home depot sells various types, small/thin, bigger and thicker...
> > I made the pi net tank coil for the pair of 4D32 rf deck out of 
> > copper
> > tubing, 
> > I soldered big wire terminal lugs (the crimp on type) on the ends 
> of 
> > the
> > coil and 
> > bolted it to large ceramic standoff insulators.
> > 
> > Here is a link to a picture:
> > 
> > http://wa5bxo.shacknet.nu/N2DTS/new%20coil-a.JPG
> > 
> > My thanks to wa5bxo who still has my pictures up!
> > The wine bottle in the picture was used to wind the tubing on.
> > The home brew receivers are in the background...
> > 
> > Brett
> ______________________________________________________________
> AMRadio mailing list
> Home: http://mailman.qth.net/mailman/listinfo/amradio
> Help: http://mailman.qth.net/mmfaq.html
> Post: mailto:AMRadio at mailman.qth.net
> AMfone Website: http://www.amfone.net
> AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb
> 
> ______________________________________________________________
> AMRadio mailing list
> Home: http://mailman.qth.net/mailman/listinfo/amradio
> Help: http://mailman.qth.net/mmfaq.html
> Post: mailto:AMRadio at mailman.qth.net
> AMfone Website: http://www.amfone.net
> AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb
> 
> 



More information about the AMRadio mailing list

This page last updated 23 Oct 2017.