[Repeater-Builder] Re: 6M duplexer wanted in UK
Hi Ian, All points noted and I do appreciate that a few 6M repeaters in the UK do use the heliax design but I do wonder how stable and efficient they are compared with a set of 4 Wacoms or similar. I must admit that I have 8 suitable lenghs of LDF750 that has been donated by our understanding aerial riggers but have not yet got a soldering iron to them! I do however intend to make one stub and see how that looks on a spectrum anyliserI suppose in this weather I could leave it out in the cold for a couple of hours and test it and let it warm back up and test it again to see it's stability. Having spoke to those that have got proper cans on their repeaters they all recommend going down the can route (despite the expence) Cheers Dave UZN ps.Still looking for someone with a set of cans for sale. --- In Repeater-Builder@yahoogroups.com, IM Ashford [EMAIL PROTECTED] wrote: Dave, Having looked at the GB3FH website,this duplexer looks to be self compensating. Any expansion due to heating of the heliax inner should be compensated by expansion of the linking feeder inner,pushing the tuning bar upwards. I have doubts as to the small effect on tuning that 0.2mm expansion on a 1.3m stub would have (0-40 degC) I also have doubts that an inner constrained and corrugated in foam would self expand in the first place. I think this design could be ideal given some RD time and a little patience..I have my eyes on a 25m piece of 1 5/8 at the moment in the Oxford area.. I just need to persuade the owners that I am not a scrap metal capitalist and need the stuff for a genuine non-profit purpose.. will keep you posted Ian G8PWE Walsall UK - Original Message - From: dave_g7uzn To: Repeater-Builder@yahoogroups.com Sent: Thursday, December 14, 2006 3:37 PM Subject: [Repeater-Builder] Re: 6M duplexer wanted in UK Are you saying that a duplexer built from heliax can cope with a 0.5MHz plit at any temperature?I somehow doubt it (no invar!) Cheers Dave UZN --- In Repeater-Builder@yahoogroups.com, Matt Beasant g4rky@ wrote: Hi Steve, The 'FH duplexer was built by a very good friend, who doesn't want to build another one!!! But yes, it was built from LDF7-50 1 -5/8 Heliax. Matt - Original Message - From: Steve To: Repeater-Builder@yahoogroups.com Sent: Wednesday, December 06, 2006 5:14 PM Subject: Re: [Repeater-Builder] 6M duplexer wanted in UK Hi Matt What size heliax did you use, I seem to remember that it was built for you, wasn't it. I tried myself with small dia stuff and it was not very good, went slightly off tune and of course rx desense. As I have said, itmay just have been the cable I used. 73 Steve - Original Message - From: Matt Beasant To: Repeater-Builder@yahoogroups.com Sent: Wednesday, December 06, 2006 4:06 PM Subject: Re: [Repeater-Builder] 6M duplexer wanted in UK My heliax duplexer has been in service now for over 2 years at GB3FH without fault or need to re-adjust. I check it every time I visit site and it never moves! Over 85dB rejection on one side and 90 odd dB on the other, works fine for me. You can see pictures of it at www.gb3fh.org.uk Regards, Matt, G4RKY --- Steve steve.m1swb@ wrote: Hi don't get me wrong, Iam not condeming heliax duplexers totaly, but you have to take into account reliability once on site. I did make one but had to scrap it as it was so unreliable causing de sense etc, and every time I had to look at it I had to make arragements to access the site, which could take upto 2 weeks, must point out the one I made used small dia heliax, maybe larger dia would be OK but as I can't get any, I don't know Anyway had my say so end of thread from me Steve - Original Message - From: Barry C' To: Repeater-Builder@yahoogroups.com Sent: Wednesday, December 06, 2006 11:25 AM Subject: Re: [Repeater-Builder] 6M duplexer wanted in UK Being a fan to the exclusion of saving several hundred quid is rather silly when the duplexers work well and are generally quite efficient . From: Steve steve.m1swb@ Reply-To: Repeater-Builder@yahoogroups.com To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] 6M duplexer wanted in UK Date: Wed, 6 Dec 2006 11:07:54 - Hi think you will find that Dave, like me, isn't a huge fan of Heliax duplexers, see my posts about actualy getting hold of ldf 750 73 Steve - Original Message - From: Mr John Lloyd To: dave_g7uzn@ ;
Re: [Repeater-Builder] Re: 6M duplexer wanted in UK
IM Ashford [EMAIL PROTECTED] wrote: Any expansion due to heating of the heliax inner should be compensated by expansion of the linking feeder inner,pushing the tuning bar upwards. I had a set of homebrew 220Mhz duplexers made out copper pipe that would drift with temperature changes. I built a plywood box, put them inside, and added a small lightbulb controlled by a thermostat. This kept them very stable. There's no reason that you couldn't do the same thing for the coax duplexers. Not very pretty, but effective. Too bad the UK is so expensive to ship to. We just pulled out six 200 foot runs of Andrew 1 5/8 VXL7-50 heliax that was damaged at the top of the monople. It got chopped up into 6 foot lengths and dumpstered. (Not much value to this stuff). 73, Joe, k1ike
[Repeater-Builder] Syntor X and DPL
W9TS and K7IC and others have reverse engineered 99% of the Syntor X's code plug (http://home.xnet.com/~pakman/syntor/syntorx.htm). The reason I say 99% and not 100% is that KB8ZQZ discovered that some non-Motorola radios (specifically his Yaesu VX-5R) wouldn't decode the DPL generated by the Syntor with bits 0-2 of byte 5 set to all ones as documented. He also discovered factory programmed code plugs that didn't have the all ones setting. By experimentation Dennis found the bit settings that worked with his Yeasu and incorporated his findings into his excellent syntorxgen program (http://msuarc.egr.msu.edu/syntorx/). A lot of codes worked with more than one setting of the funny bits (what Dennis calls bits 0-2 of byte 5) and he picked the one that worked the best on his HT for his program. This is were I came in. I'm in the process of adding DPL support to my xcat project (http://groups.yahoo.com/group/xcat) and I used Dennis's code as a base. Unfortunately on the air testing was less than successful. The first code I tried (365) worked fine, but the second code (245) failed to be decoded on an Vertex 5000 repeater with a Pacific Research controller. After some head scratching I tired changing the funny bits and found that 0 worked. Dennis's table (http://msuarc.egr.msu.edu/syntorx/dpl_sparebits_data) showed that 0 also worked with his Yeasu. The documented all ones setting for the funny bits did not work either. So here's the pitch: Is there anyone that has access to a suite case programmer with Syntor X support that is willing to generate some test plugs? I'm interested in documenting the golden setting of the funny bits as generated by mother Motorola herself. Hopefully this information will allow code plug data to be generated that will work with radios from other manufactures. Dennis's testing confirmed that the bit patterns in factory generated DPL code plugs he's seen were decoded successfully by his Yeasu. I don't need the code plug themselfs, only the data pattern generated. If you have the equipment but don't have a code plug I'll give you one. Thanks 73's Skip WB6YMH p.s. I apologize for cross posting, the other lists I posted this message to have very low traffic, but are specific to the Syntor audience.
[Repeater-Builder] Re: 6M duplexer wanted in UK
I had a set of homebrew 220Mhz duplexers made out copper pipe that would drift with temperature changes. Inch and Five-Eights hard line should not change value nearly as much as the same circuit home-brew from copper pipe. I built a plywood box, put them inside, and added a small lightbulb controlled by a thermostat. This kept them very stable. Can't argue with the above success unless you're the one paying the power bill. There's no reason that you couldn't do the same thing for the coax duplexers. Not very pretty, but effective. Probably not required. I often use reverse temp caps to track and trim temp changes the other way. cheers, s.
Re: [Repeater-Builder] repeater for sale 2 meter VHF
In a message dated 12/16/2006 7:52:28 P.M. Pacific Standard Time, [EMAIL PROTECTED] writes: What I have for sale is a BridgeCom VHF repeater. At this time it is programmed for 146.7/100 and is set for about 3 to 5 watts. This is a 40 watt repeater. I have the program software for it and it will come with it. Cable is a standard 9 pin male/female computer cable. Is this the CS-540 or a different model?
Re: [Repeater-Builder] repeater for sale 2 meter VHF
I ask because the BridgeCom frequency specs for this model do not include the amateur bands. In a message dated 12/17/2006 3:19:22 P.M. Pacific Standard Time, [EMAIL PROTECTED] writes: yes it is the model CS-540 John - Original Message - From: [EMAIL PROTECTED] (mailto:[EMAIL PROTECTED]) To: [EMAIL PROTECTED] (mailto:Repeater-Builder@yahoogroups.com) Sent: Sunday, December 17, 2006 3:54 PM Subject: Re: [Repeater-Builder] repeater for sale 2 meter VHF In a message dated 12/16/2006 7:52:28 P.M. Pacific Standard Time, [EMAIL PROTECTED] (mailto:[EMAIL PROTECTED]) writes: What I have for sale is a BridgeCom VHF repeater. At this time it is programmed for 146.7/100 and is set for about 3 to 5 watts. This is a 40 watt repeater. I have the program software for it and it will come with it. Cable is a standard 9 pin male/female computer cable. Is this the CS-540 or a different model?
[Repeater-Builder] Re: [Motorola-Metrum-Motrac-Motran-Mocom] Kellogg's FCC Sign Pact
... forwarded ... ;) - Original Message - From: Dave [EMAIL PROTECTED] Date: Sunday, December 17, 2006 10:00 am Subject: [Motorola-Metrum-Motrac-Motran-Mocom] Kellogg's FCC Sign Pact Washington D.C.- It was announced today that Kellogg's and the Federal Communications Commission have signed a pact to issue Amateur Radio Licenses on specially marked boxes of Corn Flakes. In this unprecedented move the FCC believes this will not hurt amateur radio but allow all individuals to receive an amateur radio license without having to demonstrate any skills with the exception of being able to use a pair of scissors to cut out their operating permit from the breakfast cereal box. Kellogg's spokesperson commented that they were proud to have been selected by the government to be the issuer of licenses for amateur radio in the US and hope to soon make an agreement with other cereal loving countries. They also expect that will be issuing certificates of achievement for DXCF for confirmed contacts with 100 corn flakers.
Re: [Repeater-Builder] Re: [Motorola-Metrum-Motrac-Motran-Mocom] Kellogg's FCC Sign Pact
Gentlemen, does this promote our hobby? Steve NU5D On 12/17/06, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: ... forwarded ... ;) - Original Message - From: Dave [EMAIL PROTECTED] Date: Sunday, December 17, 2006 10:00 am Subject: [Motorola-Metrum-Motrac-Motran-Mocom] Kellogg's FCC Sign Pact Washington D.C.- It was announced today that Kellogg's and the Federal Communications Commission have signed a pact to issue Amateur Radio Licenses on specially marked boxes of Corn Flakes. In this unprecedented move the FCC believes this will not hurt amateur radio but allow all individuals to receive an amateur radio license without having to demonstrate any skills with the exception of being able to use a pair of scissors to cut out their operating permit from the breakfast cereal box. Kellogg's spokesperson commented that they were proud to have been selected by the government to be the issuer of licenses for amateur radio in the US and hope to soon make an agreement with other cereal loving countries. They also expect that will be issuing certificates of achievement for DXCF for confirmed contacts with 100 corn flakers. Yahoo! Groups Links -- Ham Radio Spoken Here.NU5D
Re: [Repeater-Builder] Re: [Motorola-Metrum-Motrac-Motran-Mocom] Kellogg's FCC Sign Pact
On Sun, 17 Dec 2006, Steve Bosshard (NU5D) wrote: Gentlemen, does this promote our hobby? Steve NU5D Spreading word about the code being dropped is bringing more people in... I have two more friends who are considering getting into the hobby now that it's just paper tests like the certifications they've already attained and the college degrees they have already recieved -- Kris Kirby [EMAIL PROTECTED]
[Repeater-Builder] Re: 6M duplexer wanted in UK
Arrgh! This place is lousy with people who are looking for 6 or 8 of those pieces. 'JK --- In Repeater-Builder@yahoogroups.com, Joe [EMAIL PROTECTED] wrote: IM Ashford [EMAIL PROTECTED] wrote: Too bad the UK is so expensive to ship to. We just pulled out six 200 foot runs of Andrew 1 5/8 VXL7-50 heliax that was damaged at the top of the monople. It got chopped up into 6 foot lengths and dumpstered. (Not much value to this stuff). 73, Joe, k1ike
RE: [Repeater-Builder] Re: [Motorola-Metrum-Motrac-Motran-Mocom] Kellogg's FCC Sign Pact
Sure doesn't... this is the type of attitude that keeps people from joining our hobby. Richard, N7TGB -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] Behalf Of Steve Bosshard (NU5D) Sent: Sunday, December 17, 2006 6:45 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Re: [Motorola-Metrum-Motrac-Motran-Mocom] Kellogg's FCC Sign Pact Gentlemen, does this promote our hobby? Steve NU5D On 12/17/06, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: ... forwarded ... ;) - Original Message - From: Dave [EMAIL PROTECTED] Date: Sunday, December 17, 2006 10:00 am Subject: [Motorola-Metrum-Motrac-Motran-Mocom] Kellogg's FCC Sign Pact Washington D.C.- It was announced today that Kellogg's and the Federal Communications Commission have signed a pact to issue Amateur Radio Licenses on specially marked boxes of Corn Flakes. In this unprecedented move the FCC believes this will not hurt amateur radio but allow all individuals to receive an amateur radio license without having to demonstrate any skills with the exception of being able to use a pair of scissors to cut out their operating permit from the breakfast cereal box. Kellogg's spokesperson commented that they were proud to have been selected by the government to be the issuer of licenses for amateur radio in the US and hope to soon make an agreement with other cereal loving countries. They also expect that will be issuing certificates of achievement for DXCF for confirmed contacts with 100 corn flakers. Yahoo! Groups Links -- Ham Radio Spoken Here.NU5D
Re: [Repeater-Builder] repeater for sale 2 meter VHF
When I got it from Bridge Com they said it will do the amateur band and there has been no problem to program them in the repeater. I would suggest you give them a call and they can fill you in on that. John - Original Message - From: [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Sunday, December 17, 2006 7:11 PM Subject: Re: [Repeater-Builder] repeater for sale 2 meter VHF I ask because the BridgeCom frequency specs for this model do not include the amateur bands. In a message dated 12/17/2006 3:19:22 P.M. Pacific Standard Time, [EMAIL PROTECTED] writes: yes it is the model CS-540 John - Original Message - From: [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Sunday, December 17, 2006 3:54 PM Subject: Re: [Repeater-Builder] repeater for sale 2 meter VHF In a message dated 12/16/2006 7:52:28 P.M. Pacific Standard Time, [EMAIL PROTECTED] writes: What I have for sale is a BridgeCom VHF repeater. At this time it is programmed for 146.7/100 and is set for about 3 to 5 watts. This is a 40 watt repeater. I have the program software for it and it will come with it. Cable is a standard 9 pin male/female computer cable. Is this the CS-540 or a different model?
[Repeater-Builder] 4W EM Remote
I have an opportunity to establish remote control for several of our ham repeaters that are co-locates with our county microwave system. There are plenty of spare $W EM channels available with the switch from an analog to a digital system. My objective is to remove a little RF from our RACES room and consolodate the current mess into something simple. Ideally, I can hack together a simple pushbutton operated panel: push to select a particular repeater. Think of the old office phones. Anyone out there doing this? Suggestions? Traps? Thanks in advance, Bill - WB1GOT
Re: [Repeater-Builder] repeater for sale 2 meter VHF
Thanks John There's a couple of issues involved here. The first, which you have resolved, is whether the head end will operate in the amateur bands. The second is whether the spurious specs are unacceptably degraded when you do this. Low pass filters are probably not affected but band pass filters could be. I'll see what I can find out. Bruce In a message dated 12/17/2006 8:15:00 P.M. Pacific Standard Time, [EMAIL PROTECTED] writes: When I got it from Bridge Com they said it will do the amateur band and there has been no problem to program them in the repeater. I would suggest you give them a call and they can fill you in on that. John
[Repeater-Builder] Re: [Motorola-Metrum-Motrac-Motran-Mocom] Kellogg's FCC Sign Pact
Anyone that misses the humor here needs new finals... Laryn K8TVZ Washington D.C.- It was announced today that Kellogg's and the Federal Communications Commission have signed a pact to issue Amateur Radio Licenses on specially marked boxes of Corn Flakes. In this unprecedented move the FCC believes this will not hurt amateur radio but allow all individuals to receive an amateur radio license without having to demonstrate any skills with the exception of being able to use a pair of scissors to cut out their operating permit from the breakfast cereal box. Kellogg's spokesperson commented that they were proud to have been selected by the government to be the issuer of licenses for amateur radio in the US and hope to soon make an agreement with other cereal loving countries. They also expect that will be issuing certificates of achievement for DXCF for confirmed contacts with 100 corn flakers.
Re: [Repeater-Builder] 4W EM Remote
At 08:22 PM 12/17/06, you wrote: I have an opportunity to establish remote control for several of our ham repeaters that are co-locates with our county microwave system. There are plenty of spare $W EM channels available with the switch from an analog to a digital system. My objective is to remove a little RF from our RACES room and consolodate the current mess into something simple. Ideally, I can hack together a simple pushbutton operated panel: push to select a particular repeater. Think of the old office phones. Anyone out there doing this? Suggestions? Traps? Thanks in advance, Bill - WB1GOT I spent five years doing installation, repair, adds, moves and changes on those old 1A2 phone systems. In fact I have two of the 30-button (29 lines plus hold) brand new in the box plus a half dozen card shelves and power supplies that were going into the dumpster in the next garage cleanout. BTW the old AUTOVON phone system was a 4w system. So what is the end result that you are trying to accomplish? Mike WA6ILQ
