RE: [Repeater-Builder] 6m heliax duplexer experiment
OK folks... have done a minor re-write of the duplexer page with a bunch of updated data.. www.k5jmp.us look for the duplexer link on the left-hand side.. moderators, and webmasters of RBTIP heads-up... the URL has changes as well.. 73 Mike Perryman www.k5jmp.us 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] 6m heliax duplexer experiment
At 02:05 PM 04/20/06, you wrote: OK folks... have done a minor re-write of the duplexer page with a bunch of updated data.. www.k5jmp.us look for the duplexer link on the left-hand side.. FYI ... The Sams web site link is dead... BTW, wanta try a UHF duplexer using 6 3/8 heliax? Mike WA6ILQ 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] 6m heliax duplexer experiment
Sorry - that was supposed to be a email to Mike, not the list... ...new keyboard can't type any better than the old one... 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] 6m heliax duplexer experiment
Thanks Mike just looked and some of the pic,s are missing 73 Steve - Original Message - From: Mike Perryman [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Thursday, April 20, 2006 10:05 PM Subject: RE: [Repeater-Builder] 6m heliax duplexer experiment OK folks... have done a minor re-write of the duplexer page with a bunch of updated data.. www.k5jmp.us look for the duplexer link on the left-hand side.. moderators, and webmasters of RBTIP heads-up... the URL has changes as well.. 73 Mike Perryman www.k5jmp.us Yahoo! Groups Links -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.385 / Virus Database: 268.4.4/320 - Release Date: 20/04/06 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] 6m heliax duplexer experiment
Good show Mike! Q: What would be the effect of using high quality 75 ohm cable (say double shielded RG-6) for the interconnect cables? At 03:05 PM 4/20/2006, you wrote: OK folks... have done a minor re-write of the duplexer page with a bunch of updated data.. www.k5jmp.us look for the duplexer link on the left-hand side.. moderators, and webmasters of RBTIP heads-up... the URL has changes as well.. 73 Mike Perryman www.k5jmp.us Yahoo! Groups Links Thanks, Robin Midgett K4IDC 615-322-5836 office - rolls to pager 615-835-7699 pager 615-301-1642 home [EMAIL PROTECTED] http://www.people.vanderbilt.edu/~robin.midgett/index.htm 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] 6m heliax duplexer experiment
I would guess that the resulting impedance mismatch would mess with the current nodes somewhat... In order to acheive peak effeciency, you really want to stay on the odd numbered 1/4 wave current nodes. Not really sure what the effect on velocity of propagation would be.. you will definately need that bit of information to cut the length properly. I strongly suggest sticking with 50 ohm high quality cable. I have found that the little details are what will kill an effort regarding this project.. The series resonant notch is very sensitive, so it doesn't take much of a change to wander from resonance... and you need every dB you can wring out of this design. If I get a chance, I will look into it.. I think I have some RG6 around here... the foil may become an issue as well over time. Just not real sure. 73 Mike K5JMP www.k5jmp.us -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] Behalf Of Robin Midgett Sent: Thursday, April 20, 2006 7:11 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] 6m heliax duplexer experiment Good show Mike! Q: What would be the effect of using high quality 75 ohm cable (say double shielded RG-6) for the interconnect cables? At 03:05 PM 4/20/2006, you wrote: OK folks... have done a minor re-write of the duplexer page with a bunch of updated data.. www.k5jmp.us look for the duplexer link on the left-hand side.. moderators, and webmasters of RBTIP heads-up... the URL has changes as well.. 73 Mike Perryman www.k5jmp.us Yahoo! Groups Links Thanks, Robin Midgett K4IDC 615-322-5836 office - rolls to pager 615-835-7699 pager 615-301-1642 home [EMAIL PROTECTED] http://www.people.vanderbilt.edu/~robin.midgett/index.htm 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] 6m heliax duplexer experiment
Lathes and the use of them are no problem for me...and I'm state side. At 07:13 AM 4/19/2006, you wrote: Well, it requires machining custom piston-style capacitors from brass rod, and teflon rods... If you don't have access to a lathe, it could be a very expensive approach to the issue. I will post a how-to article for the RBTIP page when everything has been proven and tested. So far, I only have one of the filters. It is currently under stability testing, and will take time to evaluate the design. I am ordering more teflon rod stock, which has to be shipped to the UK for machining by my counterpart in the experiment.. Brian has been extremely helpful, and I could not have gotten this far without his expertise. I will keep folks on the list up to date with our progress... but it will be a while before I am ready to publish anything.. For the time being.. initial results are looking very promising!! 73 Mike Perryman www.k5jmp.us -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] Behalf Of Robin Midgett Sent: Tuesday, April 18, 2006 6:45 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Re: Dayton Hamvention Hi Mike, I'm interested in your efforts..I'm planning to build some 6m heliax duplexers...please share. At 02:23 PM 4/18/2006, you wrote: Jeff, I am cooking-up a pet project to stabilize the 6m heliax duplexer... And I think I have it licked. Will let you know how it works out. I have a filter in my repeater under test now... even the Brown-Shirts couldn't make this thing move around in tuning.. hehehe mike -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] Behalf Of 'Jeff DePolo WN3A' Sent: Tuesday, April 18, 2006 4:12 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Re: Dayton Hamvention Avoiding it like the plague Sir!! If you don't go, how are you going to earn any Dayton spending money? WN3A's Las Vegas motto: There's no such thing as a loser, just winners that quit too early. --- Jeff -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.385 / Virus Database: 268.4.3/317 - Release Date: 4/18/2006 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.385 / Virus Database: 268.4.3/317 - Release Date: 4/18/2006 Yahoo! Groups Links Yahoo! Groups Links Thanks, Robin Midgett K4IDC 615-322-5836 office - rolls to pager 615-835-7699 pager 615-301-1642 home [EMAIL PROTECTED] http://www.people.vanderbilt.edu/~robin.midgett/index.htm Yahoo! Groups Links Yahoo! Groups Links Thanks, Robin Midgett K4IDC 615-322-5836 office - rolls to pager 615-835-7699 pager 615-301-1642 home [EMAIL PROTECTED] http://www.people.vanderbilt.edu/~robin.midgett/index.htm 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] 6m heliax duplexer experiment
I was working on a Econo-plexer. Does anyone know where to get Johansen style piston trimmer capacitors for cheap? I am looking for the kind that has the screw retaining nut for ground and just the little round dimple on the other side. 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] 6m heliax duplexer experiment
Try Nebraska Surplus. They have Johanson and other mfgrs. Nice photos/descriptions of each on their website. Still aren't cheap at $5 to $10+ each depending on the pf range. Unfortunately, they don't have the exact Johanson P/N 5602 I'm looking for to fix a couple of DB prod VHF cans. However, they do have something similar that could work in a pinch. Ralph W4XE -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] Behalf Of DCFluX Sent: Wednesday, April 19, 2006 1:34 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] 6m heliax duplexer experiment I was working on a Econo-plexer. Does anyone know where to get Johansen style piston trimmer capacitors for cheap? I am looking for the kind that has the screw retaining nut for ground and just the little round dimple on the other side. 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/
