[AMRadio] Coils
Hello Don I would like to purchase your Coil Forms and receiving coil Box ($140) and the box of and Mini-Ductors and Air-Dux coils ($75). Please tell me the total to 97520 Thanks, Bob K2GLO __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] coils
Well, with thicker tubing, the outer layer will be thicker! How much thicker would it be? As I understand it, the frequency determines how deep the current flows. 73 Jim W5JO
RE: [AMRadio] coils
Well, with thicker tubing, the outer layer will be thicker! It would also be stronger and not sag if you have a longer larger coil. No, I don't plan on coating the coil with anything. Brett N2DTS -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Edward B Richards Sent: Sunday, January 08, 2006 11:27 PM To: amradio@mailman.qth.net Subject: Re: [AMRadio] coils 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
Re: [AMRadio] coils
On Mon, 9 Jan 2006, [EMAIL PROTECTED] wrote: Sand?? Doesn't this make it solid state??? klc Well, u - tube envelopes are made out of. ? Cheers John KB6SCO
Re: [AMRadio] coils
Sand?? Doesn't this make it solid state??? klc - Original Message - From: John Lawson <[EMAIL PROTECTED]> Date: Sunday, January 8, 2006 9:21 pm Subject: Re: [AMRadio] coils > > > > > > - Original Message - From: "Edward B Richards" > <[EMAIL PROTECTED]>>> > >> 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. > > > A trick to making smooth bends in soft metal tubing, is to fill > it with > fine sand first. > > Now - I understand this can be tedious with long lengths of > small-diameter stock, but if you have no other mandrels or > fixtures to > wind it on, sometimes this can help from developing a kink in the > pipe. > Then, you can blow the sand out, or just leave it in there - > won't hurt > the electrical specs of the coil... > > Cheers > > John KB6SCO > > __ > AMRadio mailing list > Home: http://mailman.qth.net/mailman/listinfo/amradio > Help: http://mailman.qth.net/mmfaq.html > Post: mailto:AMRadio@mailman.qth.net > AMfone Website: http://www.amfone.net > AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb >
Re: [AMRadio] coils
Thanks, John. 73, Ed Richards K6UUZ Simi Valley, Ca 93065 Home of the Air Force 1 pavilion On Sun, 8 Jan 2006 21:21:34 -0500 (EST) John Lawson <[EMAIL PROTECTED]> writes: > > > > > > - Original Message - From: "Edward B Richards" > <[EMAIL PROTECTED]> > >> > >> 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. > > >A trick to making smooth bends in soft metal tubing, is to fill > it with > fine sand first. > >Now - I understand this can be tedious with long lengths of > small-diameter stock, but if you have no other mandrels or fixtures > to > wind it on, sometimes this can help from developing a kink in the > pipe. > >Then, you can blow the sand out, or just leave it in there - > won't hurt > the electrical specs of the coil... > >Cheers > > John KB6SCO > > __ > AMRadio mailing list > Home: http://mailman.qth.net/mailman/listinfo/amradio > Help: http://mailman.qth.net/mmfaq.html > Post: mailto:AMRadio@mailman.qth.net > AMfone Website: http://www.amfone.net > AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb > >
Re: [AMRadio] coils
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 <[EMAIL PROTECTED]> 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: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Edward B > Richards > Sent: Sunday, January 08, 2006 8:46 PM > To: amradio@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 > <[EMAIL PROTECTED]> 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@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@mailman.qth.net > AMfone Website: http://www.amfone.net > AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb > >
Re: [AMRadio] coils
Thanks, Jim. 73, Ed Richards K6UUZ Simi Valley, Ca 93065 Home of the Air Force 1 pavilion On Sun, 8 Jan 2006 20:02:19 -0600 "Jim Wilhite" <[EMAIL PROTECTED]> writes: > Ed, have you considered the 1/8 inch copper tubing? It is not > commonly > available but is easier to work with as you wind. > If you are interested, go here: > http://www.plumbingworld.com/coppertubing.html > > Buy by the foot.. > > 73 Jim > W5JO > > - Original Message - > From: "Edward B Richards" <[EMAIL PROTECTED]> > To: > Sent: Sunday, January 08, 2006 7:45 PM > 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 > > > > > __ > AMRadio mailing list > Home: http://mailman.qth.net/mailman/listinfo/amradio > Help: http://mailman.qth.net/mmfaq.html > Post: mailto:AMRadio@mailman.qth.net > AMfone Website: http://www.amfone.net > AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb > >
RE: [AMRadio] coils
Thanks to everyone on the list who responded with great ideas and sources including the ebay seller KQ4BY. I will probably go that route since I intend to use the middle section of the coil for the link, so I will need a fairly large coil. Greg W5RY -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Brett gazdzinski Sent: Sunday, January 08, 2006 5:49 PM To: 'Discussion of AM Radio' Subject: RE: [AMRadio] coils 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@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb
RE: [AMRadio] coils
In case anyone wants to look at the other equipment, here is the parent directory... http://wa5bxo.shacknet.nu/N2DTS Brett
RE: [AMRadio] coils
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: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Edward B Richards Sent: Sunday, January 08, 2006 8:46 PM To: amradio@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 <[EMAIL PROTECTED]> 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@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb
RE: [AMRadio] coils
Mark, It's a 40 meter only class C RF deck, two 4D32 tubes in parallel pie net output. I use the vernier drives because they have numbers and pointers, so I can reset things to where they need to be. On the other multi band rigs, I mount a chart that lists the settings for each band. This rig is only one band, but I wanted it to match the others. I use the same meters, the same knobs, the same switches, lights, etc. on each rig. I had the rig in the picture on the air a few weeks ago, using a modulator from another rig. The rf deck, control deck, and power supply are done, I need to build the modulator deck, and its power supply. I was running it at 1200 volts at about 300 ma for about 250 watts out, and tried 1500 volts for a while. It seemed to work quite well. Brett N2DTS -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of W1EOF Sent: Sunday, January 08, 2006 8:10 PM To: Discussion of AM Radio Subject: RE: [AMRadio] coils Hi Brett - Nice looking work. You must take your time, and I'm guessing enjoy some wine as you build. :-) Is that an amplifier or an exciter? I'm curious about the vernier dials. I've never seen them used except on a self-excited radio where the tuning is *VERY* critical. Otehrwise it would seem like a real pain to have to twist the knob so many times to go from one band to another. 73, Mark W1EOF
Re: [AMRadio] coils
- Original Message - From: "Edward B Richards" <[EMAIL PROTECTED]> 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. A trick to making smooth bends in soft metal tubing, is to fill it with fine sand first. Now - I understand this can be tedious with long lengths of small-diameter stock, but if you have no other mandrels or fixtures to wind it on, sometimes this can help from developing a kink in the pipe. Then, you can blow the sand out, or just leave it in there - won't hurt the electrical specs of the coil... Cheers John KB6SCO
Re: [AMRadio] coils
Ed, have you considered the 1/8 inch copper tubing? It is not commonly available but is easier to work with as you wind. If you are interested, go here: http://www.plumbingworld.com/coppertubing.html Buy by the foot.. 73 Jim W5JO - Original Message - From: "Edward B Richards" <[EMAIL PROTECTED]> To: Sent: Sunday, January 08, 2006 7:45 PM 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
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 <[EMAIL PROTECTED]> 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
RE: [AMRadio] coils
Hi Brett - Nice looking work. You must take your time, and I'm guessing enjoy some wine as you build. :-) Is that an amplifier or an exciter? I'm curious about the vernier dials. I've never seen them used except on a self-excited radio where the tuning is *VERY* critical. Otehrwise it would seem like a real pain to have to twist the knob so many times to go from one band to another. 73, Mark W1EOF > -Original Message- > From: Brett gazdzinski [mailto:[EMAIL PROTECTED] > Sent: Sunday, January 08, 2006 6:49 PM > To: 'Discussion of AM Radio' > Subject: RE: [AMRadio] coils > > 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 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.371 / Virus Database: 267.14.15/223 - Release Date: 1/6/06
RE: [AMRadio] coils
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] COILS - WAS (no subject)
Hi Greg, I just posted a large list with loads of those coils for sale on here. You must have missed it! Once again - the descriptions of the coils, along with photos and prices, can be found at: http://www.af4k.com/coils.htm On 7 Jan 2006 at 19:24, Greg Schultz Sr wrote: > Does anyone know of a source for winding air core coils similar to the > old B&W types?? I need two 2-3in diameter with about 60-70 turns for a > tuner - at least 12ga. There was a seller on ebay several months ago > who wound coils to your specs but I lost his email address. Anyone know > of this person?? > > > > Greg W5RY > > __ > AMRadio mailing list > Home: http://mailman.qth.net/mailman/listinfo/amradio > Help: http://mailman.qth.net/mmfaq.html > Post: mailto:AMRadio@mailman.qth.net > AMfone Website: http://www.amfone.net > AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb >
[AMRadio] coils needed
Howdy Men I am in need of a 40jel and a 80jel coil set.. I have sockets. Even if they need repair.. anyone have any of these to part with? thanks Ronnie
