Re: [Repeater-Builder] Still after
On Sun, 24 Jul 2005, DCFluX wrote: Plastic cans were a great concept, until the spray copper micro arcs and causes desence when any signifigant amount of power is ran thorough them. Ooo! Ooo! I've got it! I've got it! Aluminum Foil wrapped around a plastic cylinder! /me wonders what was in the water this morning; potato juice? -- Kris Kirby [EMAIL PROTECTED] BIG BROTHER IS WATCHING YOU! This message brought to you by the US Department of Homeland Security Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Still after
The surface is not constant enough to make the correct impedence, and then you have to take the tempreture coefficent into account. On 7/25/05, Kris Kirby [EMAIL PROTECTED] wrote: On Sun, 24 Jul 2005, DCFluX wrote: Plastic cans were a great concept, until the spray copper micro arcs and causes desence when any signifigant amount of power is ran thorough them. Ooo! Ooo! I've got it! I've got it! Aluminum Foil wrapped around a plastic cylinder! /me wonders what was in the water this morning; potato juice? -- Kris Kirby [EMAIL PROTECTED] BIG BROTHER IS WATCHING YOU! This message brought to you by the US Department of Homeland Security Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Still after
Hey Kevin You have any Picsof this Or Diagrams On making the loops and Pass Notch info Caps ect. Ive Been looking for a while for 6 meter cans.. I have 1 5/8 hardline was going to Build a Helix Duplexer. How long are the cavites? why not just Use Stovepipe and Cap both Ends? Neal Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Still after
8 or 12 Aluminum Irrigation pipe will work. but god help you if you don't have a friend that can Tig weld, And most welders will burn right through the thin material. A welding shop is not a machine shop, There is a difference. Machine shops use 3 decimal place inchs, Welders usually measure stuff with cubits. Aluminum solder is practically useless. It is more fessible to form the ends with a bent lip and rivit them into the pipes. Which is probably what you would have to do as the inner conductor would still be formed from copper, which will not weld to aluminum. It is also fessible to form the end of the pipe into a wall for the top and bottom, but I am sure this requires some large piece of equipment and some heat. Some of the so called aluminum solder claims to bond aluminum to copper, but don't try it unless you are willing to waste your material. On 7/23/05, Neal Newman [EMAIL PROTECTED] wrote: Hey Kevin You have any Picsof this Or Diagrams On making the loops and Pass Notch info Caps ect. Ive Been looking for a while for 6 meter cans.. I have 1 5/8 hardline was going to Build a Helix Duplexer. How long are the cavites? why not just Use Stovepipe and Cap both Ends? Neal Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
RE: [Repeater-Builder] Still after
Neal, I do not have any Pic's that I can locate. This was built before digital cameras were affordable to the common man. We did take Polaroid's, but whoever has them by now are well faded. There is one fellow ( forget his name) on this list that took my description and made a very nice set of cavities. He really went all out, he had machining skills and equipment. He almost duplicated a DB products can when he was complete. He used fancy finger stock and piston caps. Very nice job. Maybe we will get him to chime in. The example I followed to make the loop was the write up on converting the db products pass cavity to a pass/notch. I have seen many articles on the web on making the loops for the cans. A very good write up on this by Jeff DePolo can be found at this link. http://www.repeater-builder.com/loband/ I did not use his method of using coax stubs to make the notches. But this is a good source of information and constructions techniques. The project was done by myself and a hand full of other hams. We took a look at a wacom duplexer and did the best we could with common parts to make something like it. Each person in the group had certain skills or equipment for making the parts. The first one we completed checked out on an IFR 800A with 22db of notch with .6 or so db of insertion loss. (not bad, could be better. Maybe using Jeff's notch setup would be better?) We compared this to others that had made these duplexers. What we found was the construction of the top plate was the most critical part of how well the cavity would work. It was common to make the top with a paint can lid or sheet metal. Theses all has poor notches and high insertion loss. The thick aluminum plate seems to work the best. Also the plexi-glass stabilizer in the can prevents the long tuning rod from moving around. Also we were the only folks to use the stove pipe crimp to fit the cans. This made the cavity very strong. all others just soldered the cans with a butt joint. We used no drawings just looked at the wacom and other coffee can cavities and went from there. I was not the first to make a set of coffee can duplexers but think we took them up a notch! (pun intended) I think I might be the only repeater still running a set. Currently the longest running set. The picture on the repeater site on my web page does not show the duplexers well as they are back in the corner behind the repeater racks and coupler array. I will see if I can get some better pictures. It is ruff as I am on the east coast now and repeater is on the west coast. I have not been to the site in 7 years. The next set was done with irrigation pipe, Yet to be finished. Still sitting here somewhere. I think I am using one tube to hold all my mobile antennas! If you have someone that is good with a tig you can weld them up. If not then just make the bottom just like the top. This is how crafty we got. to make the top plate we did not have a lath to make a clean round disk. We chucked up the square plate in a drill press at low speed and made a cutter that was held in place with the bench vice! Touched it up on the sander and bingo! It is not that critical when making LB cavities. You do not need invar or copper plating or anything like that. It is just not that much difference at these frequencies. Now vhf hi and up and you bet! It is very critical what you use and how you build it. Shoot look at the heliax cavities out there! You can not get much cruder than that in construction. Kevin King SCSA BSCIS ARS KC6OVD GMRS KAG0378 EIEIO 2722 Acworth Georgia -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] Behalf Of Neal Newman Sent: Sunday, July 24, 2005 2:55 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Still after Hey Kevin You have any Picsof this Or Diagrams On making the loops and Pass Notch info Caps ect. Ive Been looking for a while for 6 meter cans.. I have 1 5/8 hardline was going to Build a Helix Duplexer. How long are the cavites? why not just Use Stovepipe and Cap both Ends? Neal Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Still after
Wanna hear what some co's doing ? plastic cans :( Mark A. Holman AB8RU ARRL Life Member [EMAIL PROTECTED] - Original Message - From: Dave VanHorn [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com; Repeater-Builder@yahoogroups.com Sent: Friday, July 22, 2005 2:34 PM Subject: Re: [Repeater-Builder] Still after At 01:21 PM 7/22/2005, Kris Kirby wrote: On Fri, 22 Jul 2005, Jeff Condit wrote: Standard coffee cans solder together pretty easily because of the tin plating they usually used, provided you have a soldering iron with a good sized copper tip. A few of them started being plastic coated and these didn't solder well at all. Is there an observed effect on the quality of the duplexer from the surface discontinuties? Would it be worth copper plating? Can it be copper plated? I'd be very worried about stability, given the overall cheesiness of the materials. Copper pipe is probably workable, though expensive. Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Still after
At 07:09 PM 7/24/2005, Mark A. Holman wrote: Wanna hear what some co's doing ? plastic cans :( Sounds like wine in a bag, or a pocket full of gasoline, not a terribly good idea. Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Still after
Plastic cans were a great concept, until the spray copper micro arcs and causes desence when any signifigant amount of power is ran thorough them. On 7/24/05, Dave VanHorn [EMAIL PROTECTED] wrote: At 07:09 PM 7/24/2005, Mark A. Holman wrote: Wanna hear what some co's doing ? plastic cans :( Sounds like wine in a bag, or a pocket full of gasoline, not a terribly good idea. Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
RE: [Repeater-Builder] Still after
First get a stove pipe crimping tool, and a stack of big coffee cans.cut the rim off one end and use the crimpier to prep the edge cut the bottom out of the next can and rim as above. stick the crimped edge into the bottom of the next can, check for fit. do this till you have a stack taller than 54". Make four of them. wire wheel the joint to prep it for soldering. Assemble the stack of cans, use three pop rivets around each seam to hold it till soldered. Then get your propane torch and plumbing solder, sweat the joints. Oh yes, in the third can from the bottom, mount a disk of plexi-glass with a 9/16th hole in the middle. This will steady the tuning rod later. To make the top of the can use 3/8ths or 1/4 inch aluminum plate. Fit it flush with the top of the can. drill and tap or use self taping 8-32 screws to hold the top around the top. Now that you have this complete let's get some plumbing done. Get 2 each 8ft sections of 1/2 and 3/4 copper pipe. 4 1/2 copper pipe caps 4 4ft sections of 5/16ths all thread rod with a bag of nuts to fit., 4 3/4 pipe to 3/4 treaded copper fitting. four 3/4 threaded pipe caps. By now you should be getting a picture of this. cut the pipe in half so you have 4ft sections. take one end of the 3/4 pipe and cut small long triangles around the end. you with squeeze this to make it like fingers down to the 1/2 size pipe to slide through. take a 1/2 pipe cap and drill it to let the all thread through. take two nuts and secure the all thread to the cap. solder this to the end of the 1/2 pipe. now solder the threaded fitting to the top of the 3/4 pipe that you made the fingers on the opposite end. Feed the 1/2 pipe with all thread into the top of the 3/4 pipe. gently push it through the fingers you made. Test this for good even firm contact. I used so no ox here just before I did the finial tune. Take your top plate and drill a hole to accept the threaded top of the pipe. Drill and tap the 3/4 pipe cape in the center top to take the all thread. put this on and secure to the top using spacers as needed to secure the top to the pipe securely. Get some nice knobs at a swap meet and you now have a basic cavity. There are many ways to make the pickups. I made my cans pass/notch and used a so239 panel mount tuning caps out of the finals of a RCA car phone. and the loops were made from left over 1/2 pipe. I flattened it and sanded the sides to separate it into two flat peaces. We made the loops 2 3/4 inches long or 5 and 3/4 memory fades. try it and see what works it is cheep to try. We had to tack some silver mica caps across the tuning cap to get the notch where we needed it. I have a set of these on the 52.6 -500 repeater in Bakersfield California. it is a 100 watt micor base running at 75 watts with a pre-amp. It has been in service for about 16 years. This is not meant to be complete instructions to build a duplexer. It is just meant to get you a usable platform to experiment with. with good construction skills and test equipment it is very easy to make 6 meter duplexers. You can take this basic setup and replace components and materials based on your skills and availability. Lowband is a fun world to play in. Don't let folks tell you you can't do it or it wont work. IT will, it does and you can. Kevin King SCSA BSCIS ARS KC6OVD GMRS KAG0378 EIEIO 2722 Acworth Georgia -Original Message-From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED]On Behalf Of SteveSent: Friday, July 22, 2005 6:33 AMTo: Repeater-Builder@yahoogroups.comSubject: Re: [Repeater-Builder] Still after Hi Kevin please tell me more. Diagrams etc 73 Steve - Original Message - From: Kevin King To: Repeater-Builder@yahoogroups.com Sent: Friday, July 22, 2005 2:45 AM Subject: RE: [Repeater-Builder] Still after Try a set of coffee can duplexers. 20 bucks of plumbing hardware and bingo Kevin King SCSA BSCIS ARS KC6OV GMRS KAG0378 EIEIO 2722 Acworth Georgia -Original Message-From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED]On Behalf Of SteveSent: Thursday, July 21, 2005 9:40 AMTo: Repeater-Builder@yahoogroups.comSubject: [Repeater-Builder] Still after Hi Iam still after a 6mtr heliax duplexer. Iam in Liverpool UK So if any can or knows somebody who could make one, please email me direct. I have been told that the heliax ones can be troublesome but I cant afford 1200 UKP for a commercialy made one. 73 Steve M1SWB No virus found in this incoming message.Checked by AVG Anti-Virus.Version: 7.0.323 / Virus Database: 267.9.2/55 - Release Date: 21/07/05 YAHOO! GROUPS LINKS Visit your group "Repeat
RE: [Repeater-Builder] Still after
hmm good point! I guess one shows his age by coffee being in a can! Ok so go to a restaurant and see if they have the big cans that tomato sauce or vegetables may come in. Is that still packed in a can? Kevin King SCSA BSCIS ARS KC6OVD GMRS KAG0378 EIEIO 2722 Acworth Georgia -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] Behalf Of Kris Kirby Sent: Friday, July 22, 2005 11:04 AM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Still after On Thu, 21 Jul 2005, Kevin King wrote: Try a set of coffee can duplexers. 20 bucks of plumbing hardware and bingo Can you still buy coffee in cans? How do you weld those suckers together? -- Kris Kirby [EMAIL PROTECTED] BIG BROTHER IS WATCHING YOU! This message brought to you by the US Department of Homeland Security Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Still after
Many thanks sounds fun :-) Steve - Original Message - From: Kevin King To: Repeater-Builder@yahoogroups.com Sent: Saturday, July 23, 2005 8:51 PM Subject: RE: [Repeater-Builder] Still after First get a stove pipe crimping tool, and a stack of big coffee cans.cut the rim off one end and use the crimpier to prep the edge cut the bottom out of the next can and rim as above. stick the crimped edge into the bottom of the next can, check for fit. do this till you have a stack taller than 54". Make four of them. wire wheel the joint to prep it for soldering. Assemble the stack of cans, use three pop rivets around each seam to hold it till soldered. Then get your propane torch and plumbing solder, sweat the joints. Oh yes, in the third can from the bottom, mount a disk of plexi-glass with a 9/16th hole in the middle. This will steady the tuning rod later. To make the top of the can use 3/8ths or 1/4 inch aluminum plate. Fit it flush with the top of the can. drill and tap or use self taping 8-32 screws to hold the top around the top. Now that you have this complete let's get some plumbing done. Get 2 each 8ft sections of 1/2 and 3/4 copper pipe. 4 1/2 copper pipe caps 4 4ft sections of 5/16ths all thread rod with a bag of nuts to fit., 4 3/4 pipe to 3/4 treaded copper fitting. four 3/4 threaded pipe caps. By now you should be getting a picture of this. cut the pipe in half so you have 4ft sections. take one end of the 3/4 pipe and cut small long triangles around the end. you with squeeze this to make it like fingers down to the 1/2 size pipe to slide through. take a 1/2 pipe cap and drill it to let the all thread through. take two nuts and secure the all thread to the cap. solder this to the end of the 1/2 pipe. now solder the threaded fitting to the top of the 3/4 pipe that you made the fingers on the opposite end. Feed the 1/2 pipe with all thread into the top of the 3/4 pipe. gently push it through the fingers you made. Test this for good even firm contact. I used so no ox here just before I did the finial tune. Take your top plate and drill a hole to accept the threaded top of the pipe. Drill and tap the 3/4 pipe cape in the center top to take the all thread. put this on and secure to the top using spacers as needed to secure the top to the pipe securely. Get some nice knobs at a swap meet and you now have a basic cavity. There are many ways to make the pickups. I made my cans pass/notch and used a so239 panel mount tuning caps out of the finals of a RCA car phone. and the loops were made from left over 1/2 pipe. I flattened it and sanded the sides to separate it into two flat peaces. We made the loops 2 3/4 inches long or 5 and 3/4 memory fades. try it and see what works it is cheep to try. We had to tack some silver mica caps across the tuning cap to get the notch where we needed it. I have a set of these on the 52.6 -500 repeater in Bakersfield California. it is a 100 watt micor base running at 75 watts with a pre-amp. It has been in service for about 16 years. This is not meant to be complete instructions to build a duplexer. It is just meant to get you a usable platform to experiment with. with good construction skills and test equipment it is very easy to make 6 meter duplexers. You can take this basic setup and replace components and materials based on your skills and availability. Lowband is a fun world to play in. Don't let folks tell you you can't do it or it wont work. IT will, it does and you can. Kevin King SCSA BSCIS ARS KC6OVD GMRS KAG0378 EIEIO 2722 Acworth Georgia -Original Message-From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED]On Behalf Of SteveSent: Friday, July 22, 2005 6:33 AMTo: Repeater-Builder@yahoogroups.comSubject: Re: [Repeater-Builder] Still after Hi Kevin please tell me more. Diagrams etc 73 Steve - Original Message - From: Kevin King To: Repeater-Builder@yahoogroups.com Sent: Friday, July 22, 2005 2:45 AM Subject: RE: [Repeater-Builder] Still after Try a set of coffee can duplexers. 20 bucks of plumbing hardware and bingo Kevin King SCSA BSCIS ARS KC6OV GMRS KAG0378 EIEIO 2722 Acworth Georgia -Original Message-From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED]On Behalf Of SteveSent: Thursday, July 21, 2005 9:40 AMTo: Repeater-Builder@yahoogroups.comSubject: [Repeater-Builder] Still after Hi Iam still after a 6mtr heliax duplexer. Iam in Liverpool UK So if any can or knows somebody who could
RE: [Repeater-Builder] Still after
Most of the local restaurants gets their Hershey's syrup (for topping ice cream or for the milk shakes) in cans - 6 and an eighth inches diameter and 7 tall. I use them for covering 5 and 6 fireworks tubes while setting up the big shows. Yes, I'm one of the crazies that gets paid to makes things go BOOM in the night. Mike WA6ILQ At 12:59 PM 7/23/05, you wrote: hmm good point! I guess one shows his age by coffee being in a can! Ok so go to a restaurant and see if they have the big cans that tomato sauce or vegetables may come in. Is that still packed in a can? Kevin King SCSA BSCIS ARS KC6OVD GMRS KAG0378 EIEIO 2722 Acworth Georgia -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] Behalf Of Kris Kirby Sent: Friday, July 22, 2005 11:04 AM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Still after On Thu, 21 Jul 2005, Kevin King wrote: Try a set of coffee can duplexers. 20 bucks of plumbing hardware and bingo Can you still buy coffee in cans? How do you weld those suckers together? -- Kris Kirby [EMAIL PROTECTED] BIG BROTHER IS WATCHING YOU! This message brought to you by the US Department of Homeland Security Yahoo! Groups Links Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Still after
Hi Kevin please tell me more. Diagrams etc 73 Steve - Original Message - From: Kevin King To: Repeater-Builder@yahoogroups.com Sent: Friday, July 22, 2005 2:45 AM Subject: RE: [Repeater-Builder] Still after Try a set of coffee can duplexers. 20 bucks of plumbing hardware and bingo Kevin King SCSA BSCIS ARS KC6OVD GMRS KAG0378 EIEIO 2722 Acworth Georgia -Original Message-From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED]On Behalf Of SteveSent: Thursday, July 21, 2005 9:40 AMTo: Repeater-Builder@yahoogroups.comSubject: [Repeater-Builder] Still after Hi Iam still after a 6mtr heliax duplexer. Iam in Liverpool UK So if any can or knows somebody who could make one, please email me direct. I have been told that the heliax ones can be troublesome but I cant afford 1200 UKP for a commercialy made one. 73 Steve M1SWB No virus found in this incoming message.Checked by AVG Anti-Virus.Version: 7.0.323 / Virus Database: 267.9.2/55 - Release Date: 21/07/05 YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
RE: [Repeater-Builder] Still after
On Thu, 21 Jul 2005, Kevin King wrote: Try a set of coffee can duplexers. 20 bucks of plumbing hardware and bingo Can you still buy coffee in cans? How do you weld those suckers together? -- Kris Kirby [EMAIL PROTECTED] BIG BROTHER IS WATCHING YOU! This message brought to you by the US Department of Homeland Security Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Still after
Just solder them together. using some electrical tape to start, create some tack solder joints, then go around the circumfrince with a high power iron and make a bead. Use oven mitts unless your hands have heat resistive qualitys that NASA would be proud of. On 7/22/05, Kris Kirby [EMAIL PROTECTED] wrote: On Thu, 21 Jul 2005, Kevin King wrote: Try a set of coffee can duplexers. 20 bucks of plumbing hardware and bingo Can you still buy coffee in cans? How do you weld those suckers together? -- Kris Kirby [EMAIL PROTECTED] BIG BROTHER IS WATCHING YOU! This message brought to you by the US Department of Homeland Security Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Still after
Standard coffee cans solder together pretty easily because of the tin plating they usually used, provided you have a soldering iron with a good sized copper tip. A few of them started being plastic coated and these didn't solder well at all. Jeff Condit - Original Message - From: Kris Kirby [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Friday, July 22, 2005 8:03 AM Subject: RE: [Repeater-Builder] Still after On Thu, 21 Jul 2005, Kevin King wrote: Try a set of coffee can duplexers. 20 bucks of plumbing hardware and bingo Can you still buy coffee in cans? How do you weld those suckers together? -- Kris Kirby [EMAIL PROTECTED] Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Still after
A small torch and solder works great. Just like soldering copper pipe. Vincent N6OA/2 - Original Message - From: DCFluX [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Friday, July 22, 2005 12:41 PM Subject: Re: [Repeater-Builder] Still after Just solder them together. using some electrical tape to start, create some tack solder joints, then go around the circumfrince with a high power iron and make a bead. Use oven mitts unless your hands have heat resistive qualitys that NASA would be proud of. On 7/22/05, Kris Kirby [EMAIL PROTECTED] wrote: On Thu, 21 Jul 2005, Kevin King wrote: Try a set of coffee can duplexers. 20 bucks of plumbing hardware and bingo Can you still buy coffee in cans? How do you weld those suckers together? -- Kris Kirby [EMAIL PROTECTED] BIG BROTHER IS WATCHING YOU! This message brought to you by the US Department of Homeland Security Yahoo! Groups Links Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Still after
Hi Jeff to get back to my origional question, how would you use the tins to make a 6mtr duplexer, considering commercial ones are over 5ft long 73 Steve - Original Message - From: Jeff Condit [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Friday, July 22, 2005 5:43 PM Subject: Re: [Repeater-Builder] Still after Standard coffee cans solder together pretty easily because of the tin plating they usually used, provided you have a soldering iron with a good sized copper tip. A few of them started being plastic coated and these didn't solder well at all. Jeff Condit - Original Message - From: Kris Kirby [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Friday, July 22, 2005 8:03 AM Subject: RE: [Repeater-Builder] Still after On Thu, 21 Jul 2005, Kevin King wrote: Try a set of coffee can duplexers. 20 bucks of plumbing hardware and bingo Can you still buy coffee in cans? How do you weld those suckers together? -- Kris Kirby [EMAIL PROTECTED] Yahoo! Groups Links -- No virus found in this incoming message. Checked by AVG Anti-Virus. Version: 7.0.323 / Virus Database: 267.9.3/56 - Release Date: 22/07/05 Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Still after
On Fri, 22 Jul 2005, Jeff Condit wrote: Standard coffee cans solder together pretty easily because of the tin plating they usually used, provided you have a soldering iron with a good sized copper tip. A few of them started being plastic coated and these didn't solder well at all. Is there an observed effect on the quality of the duplexer from the surface discontinuties? Would it be worth copper plating? Can it be copper plated? I sense that there will soon be no coffee cans left in my town. As it is, we currently buy Folgers in large plastic jugs 10 in diameter. -- Kris Kirby [EMAIL PROTECTED] BIG BROTHER IS WATCHING YOU! This message brought to you by the US Department of Homeland Security Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Still after
At 01:21 PM 7/22/2005, Kris Kirby wrote: On Fri, 22 Jul 2005, Jeff Condit wrote: Standard coffee cans solder together pretty easily because of the tin plating they usually used, provided you have a soldering iron with a good sized copper tip. A few of them started being plastic coated and these didn't solder well at all. Is there an observed effect on the quality of the duplexer from the surface discontinuties? Would it be worth copper plating? Can it be copper plated? I'd be very worried about stability, given the overall cheesiness of the materials. Copper pipe is probably workable, though expensive. Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Still after
On Fri, 22 Jul 2005, Dave VanHorn wrote: Copper pipe is probably workable, though expensive. onlinemetals.com -- 1' brass pipe, 6 diameter... $303! I'm starting to think that copper sheet rolled into a cylinder would be a better idea. a 7 diameter duplexer is 22 in circumference. a 24 x 48 piece of copper sheet would yield 7 duplexers at 440 MHz. At 18 GA, the width of the material is 0.048. At 1MHz, the skin depth is 0.0026 in, and decreases with frequency. 0.0135 is the smallest size that onlinemetals.com stocks (which is 28 GA) and costs $71.15 in a 36 x 48 sheet. Suddenly that $1K price tag on the used 6m duplexer doesn't look so bad. -- Kris Kirby [EMAIL PROTECTED] BIG BROTHER IS WATCHING YOU! This message brought to you by the US Department of Homeland Security Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Still after
Yeah, we made a 6 meter cavity out of some dryer ventalation hose. It had a beautiful notch right where it should be, until you walked around the room. On 7/22/05, Kris Kirby [EMAIL PROTECTED] wrote: On Fri, 22 Jul 2005, Dave VanHorn wrote: Copper pipe is probably workable, though expensive. onlinemetals.com -- 1' brass pipe, 6 diameter... $303! I'm starting to think that copper sheet rolled into a cylinder would be a better idea. a 7 diameter duplexer is 22 in circumference. a 24 x 48 piece of copper sheet would yield 7 duplexers at 440 MHz. At 18 GA, the width of the material is 0.048. At 1MHz, the skin depth is 0.0026 in, and decreases with frequency. 0.0135 is the smallest size that onlinemetals.com stocks (which is 28 GA) and costs $71.15 in a 36 x 48 sheet. Suddenly that $1K price tag on the used 6m duplexer doesn't look so bad. -- Kris Kirby [EMAIL PROTECTED] BIG BROTHER IS WATCHING YOU! This message brought to you by the US Department of Homeland Security Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Still after
Hi Kris at those prices yes $1000 for a 6mtr is fair, in UK money that is about £650... I know a chap in the UK who origionaly used heliax for a 6mtr duplexer, and due various things happening it was forever going off tune. In the end the repeater group saved up and bought a commercial Procom duplexer, and problems solved, no more rx desense 73 Steve - Original Message - From: Kris Kirby [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Friday, July 22, 2005 8:20 PM Subject: Re: [Repeater-Builder] Still after On Fri, 22 Jul 2005, Dave VanHorn wrote: Copper pipe is probably workable, though expensive. onlinemetals.com -- 1' brass pipe, 6 diameter... $303! I'm starting to think that copper sheet rolled into a cylinder would be a better idea. a 7 diameter duplexer is 22 in circumference. a 24 x 48 piece of copper sheet would yield 7 duplexers at 440 MHz. At 18 GA, the width of the material is 0.048. At 1MHz, the skin depth is 0.0026 in, and decreases with frequency. 0.0135 is the smallest size that onlinemetals.com stocks (which is 28 GA) and costs $71.15 in a 36 x 48 sheet. Suddenly that $1K price tag on the used 6m duplexer doesn't look so bad. -- Kris Kirby [EMAIL PROTECTED] BIG BROTHER IS WATCHING YOU! This message brought to you by the US Department of Homeland Security Yahoo! Groups Links -- No virus found in this incoming message. Checked by AVG Anti-Virus. Version: 7.0.323 / Virus Database: 267.9.3/56 - Release Date: 22/07/05 Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
RE: [Repeater-Builder] Still after
Try a set of coffee can duplexers. 20 bucks of plumbing hardware and bingo Kevin King SCSA BSCIS ARS KC6OVD GMRS KAG0378 EIEIO 2722 Acworth Georgia -Original Message-From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED]On Behalf Of SteveSent: Thursday, July 21, 2005 9:40 AMTo: Repeater-Builder@yahoogroups.comSubject: [Repeater-Builder] Still after Hi Iam still after a 6mtr heliax duplexer. Iam in Liverpool UK So if any can or knows somebody who could make one, please email me direct. I have been told that the heliax ones can be troublesome but I cant afford 1200 UKP for a commercialy made one. 73 Steve M1SWB YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
