[Repeater-Builder] Duplxer, tuned cavity question.
I have an APRS station on 144.39. I would also like to run my Packet station on 145.03. So I need someway to run both stations. What would I need to do? Can I build what I would need? If so where would I find that info? Thanks, Kevin Kc7hgn
Re: [Repeater-Builder] Duplxer, tuned cavity question.
Assuming from reading between the lines that you want to use both stations on the same antenna, get a 2 meter duplexer. The seperation between the 2 frequencies is 0.64 MHz. At bare minimum you need a notch (reject) duplexer but a bandpass-band reject type would probably be the better choice. Tune each leg to the respective frequency and connect to the respective radio. Milt N3LTQ - Original Message - From: Kc7hgn kc7...@yahoo.com To: Repeater-Builder@yahoogroups.com Sent: Monday, July 19, 2010 5:48 AM Subject: [Repeater-Builder] Duplxer, tuned cavity question. I have an APRS station on 144.39. I would also like to run my Packet station on 145.03. So I need someway to run both stations. What would I need to do? Can I build what I would need? If so where would I find that info? Thanks, Kevin Kc7hgn Yahoo! Groups Links
Re: [Repeater-Builder] Duplxer, tuned cavity question.
Good advice. The only thing that I would add is that you need to use good quality equipment for the antenna system. This includes the duplexer, jumpers, connectors, cable and antenna. When you have a situation where two transmitters can be on the air at the same time on the same antenna system, you always stand the chance of creating intermod. 73, Joe, K1ike On 7/19/2010 6:55 AM, Milt wrote: Assuming from reading between the lines that you want to use both stations on the same antenna, get a 2 meter duplexer. The seperation between the 2 frequencies is 0.64 MHz. At bare minimum you need a notch (reject) duplexer but a bandpass-band reject type would probably be the better choice. Tune each leg to the respective frequency and connect to the respective radio. Milt N3LTQ - Original Message - From: Kc7hgnkc7...@yahoo.com To:Repeater-Builder@yahoogroups.com Sent: Monday, July 19, 2010 5:48 AM Subject: [Repeater-Builder] Duplxer, tuned cavity question. I have an APRS station on 144.39. I would also like to run my Packet station on 145.03. So I need someway to run both stations. What would I need to do? Can I build what I would need? If so where would I find that info? Thanks, Kevin Kc7hgn Yahoo! Groups Links
Re: [Repeater-Builder] IC-F420
look in your mail box From: jim law lawsign...@yahoo.com To: repeater-builder@yahoogroups.com Sent: Sun, July 18, 2010 10:54:36 AM Subject: [Repeater-Builder] IC-F420 Does anyone have a service manual for a IC-F420 Thanks Jim
Re: [Repeater-Builder] dispatch consoles
On 7/17/2010 12:47 PM, Bill Smith wrote: Used is false economy. You end with someone elses problems and high maintenance costs as well as downtime which is a bad thing for an ambulance company. The 4010 is a nice reliable system, much simpler than the RoIP stuff but not nearly as versatile. The nice part of RoIP is that by using internet connectivity, you can have it loaded on a laptop and set up dispatch anywhere there is an internet connection in the world. Bill The bad news is so can anyone else...
Re: [Repeater-Builder] Controller recommendations
On 7/18/2010 10:28 AM, Steve Jones wrote: Thanks for everyone's input. Controller choice seems to be like a religion. Everybody has their favourite and are reluctant to try another brand. Didn't see anybody mention S-Com! http://www.scomcontrollers.com/ It'll do what you want, and they just run...and run...and run...
Re: [Repeater-Builder] Strange Request
Don't forget that Micor/Mitrek/Syntor/X/Mostar/and just about any other one from that era will work. I think Maxtrac mics will work too...maybe...I know a Maxtrac desk mic can be plugged into an older radio-all you have to do is change the cord...and vice-versa-Maxar desk mics will work on Maxtracs/Spectras with a connector. And I'm pretty sure the new mics (like say a 1225) will work on a Maxtrac... But anyway, there should be tons of Micor style mics out there somewhere... On 7/18/2010 2:47 PM, M.DIETRICH wrote: The mobile mics you are ref to are the motrac / mocom 70 vintage. The elements were made by Shure and are prob still avail. The one used in the GE mstr II were the same units but may have to mod'd a bit to fit. Re: the old desk mics, If you wanted to use on current radios, put an electret element in at and put the amp module in the base. Mike KB5FLX Specialized Communications -Original Message- From: La Rue Communications Sent: Jul 12, 2010 6:58 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Strange Request We have several of the old microphones. Desktop types. Pic attached but not sure if these are the exact units you are referring to. These are model TU532A-1. Where should I begin to look for the element part number? John Hymes La Rue Communications 10 S. Aurora Street Stockton, CA 95202 http://tinyurl.com/2dtngmnhttp://tinyurl.com/2dtngmn - Original Message - *From:* forbespmailto:patrickfor...@mac.com *To:* Repeater-Builder@yahoogroups.com mailto:Repeater-Builder@yahoogroups.com *Sent:* Monday, July 12, 2010 3:09 PM *Subject:* [Repeater-Builder] Strange Request Here's a good one, folks: I'm in need of Motorola Microphone Elements, Part Number 59D82933C02, I think. This should be the mic element for the older mobile (pre-microprocessor transceivers) Motorola microphones. It is the amplified, dynamic cartridge. Most were a metal body with a black cap over the front. Anyone have any gathering dust and taking up valuable space? I need 12 units for another cockamamie scheme of mine. I'll take whole mics, too. Gotta be the 'old' ones, though. Patrick PeoplePC Online A better way to Internet http://www.peoplepc.com
Re: [Repeater-Builder] Controller recommendations
S-Com can be a love/hate relationship. The older models did not have an RS-232 interface, so you needed to keep track of everything religiously on paper. BUT, they seemed to last forever. I have a few of them and they have never glitched..never. The newer S-Com controller has all the bells and whistles, including the computer interface. 73, Joe, K1ike On 7/19/2010 9:32 AM, wd8chl wrote: Didn't see anybody mention S-Com! http://www.scomcontrollers.com/ It'll do what you want, and they just run...and run...and run...
Re: [Repeater-Builder] Controller recommendations
On 7/19/2010 10:02 AM, Joe wrote: S-Com can be a love/hate relationship. The older models did not have an RS-232 interface, so you needed to keep track of everything religiously on paper. BUT, they seemed to last forever. I have a few of them and they have never glitched..never. The newer S-Com controller has all the bells and whistles, including the computer interface. 73, Joe, K1ike heh-RS-232 on a ham controller was a pretty rare bird no matter what...only a few had it...til abt 7-8 years ago or so...
[Repeater-Builder] Re: Controller recommendations
Joe k1ike_m...@... wrote: S-Com can be a love/hate relationship. As can be any controller... The older models did not have an RS-232 interface, so you needed to keep track of everything religiously on paper. There is/was Windows Programming Software for all the early S-Comm Controllers. Yes it used DTMF Control over the and/or over a phone line. Once you wrote the simple text scripts to program the controller the upload was fairly painless. The is an after-market Vyex Digital Audio Board Board upgrade for the 7K, which makes it the Controller and incredible machine. The DAB plays MP3 files stored on a removable MMC (memory module), the supplied firmware upgrade provides some really neat command set and function expansion... and best of all a much appreciated Serial RS-232 Port. I now do all my 7K programming through the DAB Serial Port, save/load the entire controller image or changes I need done and do a transfer to the same or what-ever 7K Controller I need to program. http://www.vyex.com/products.html BUT, they seemed to last forever. I have a few of them and they have never glitched..never. Same here, I have one of the earliest 5K's through the last of the 7K's and narry a one has ever failed. The newer S-Com controller has all the bells and whistles, including the computer interface. 73, Joe, K1ike Innovative people can park a Cat Auto RLS-1000B Link Port Switch Behind their 7K and be pretty much up with the rest of the world controller wise... less and considerations for a TCP/IP type port. http://www.catauto.com/rls1000.html cheers, skipp On 7/19/2010 9:32 AM, wd8chl wrote: Didn't see anybody mention S-Com! http://www.scomcontrollers.com/ It'll do what you want, and they just run...and run...and run...
Re: [Repeater-Builder] Re: Controller recommendations
But does it allow you to read what is programmed in the controller? Joe On 7/19/2010 1:16 PM, skipp025 wrote: There is/was Windows Programming Software for all the early S-Comm Controllers. Yes it used DTMF Control over the and/or over a phone line. Once you wrote the simple text scripts to program the controller the upload was fairly painless.
Re: [Repeater-Builder] Re: Controller recommendations
Nope. It can only write to the controller. On 7/19/10 1:23 PM, Joe k1ike_m...@snet.net wrote: But does it allow you to read what is programmed in the controller? Joe On 7/19/2010 1:16 PM, skipp025 wrote: There is/was Windows Programming Software for all the early S-Comm Controllers. Yes it used DTMF Control over the and/or over a phone line. Once you wrote the simple text scripts to program the controller the upload was fairly painless.
Re: [Repeater-Builder] Controller recommendations
The ability to program over-the-air, via phone line, or through the optional RS-232 port was one of the big advantages of the ACC controllers in the 1980's. This was a controller that was way in front of the curve, but the cost was prohibitive for the average ham. 73, Joe, K1ike On 7/19/2010 12:30 PM, wd8chl wrote: heh-RS-232 on a ham controller was a pretty rare bird no matter what...only a few had it...til abt 7-8 years ago or so...
[Repeater-Builder] Re: Controller recommendations
Joe k1ike_m...@... wrote: But does it allow you to read what is programmed in the controller? Joe Sure, I can download an entire image of the controller programming and save it. Then reprogram those contents back to the same or a different controller. Handy since I easily have 10 plus 7K Controllers (with DAB Boards) in service. S. On 7/19/2010 1:16 PM, skipp025 wrote: There is/was Windows Programming Software for all the early S-Comm Controllers. Yes it used DTMF Control over the and/or over a phone line. Once you wrote the simple text scripts to program the controller the upload was fairly painless.
[Repeater-Builder] Wanted - UHF Amplifier
K5In and I are looking for a couple of UHF Amplifier's that will have 10 to 25 watts in and 70 to 100 watts out. We would prefer n-connectors but will accept other connectors. Thanks, Larry KC7CKO
[Repeater-Builder] Motorola Mocom 70 PA Board with Heatsink
Hello Group, I have a Mocom 70 with intact PA section. Radio is a [T73BBA1900BA]. The PA board # is [TLD8882] The transistor chain is made up of [M9622], [M9624], and (4) four [M9625]. I thought perhaps that the PA section would make a great 2m amp. Is anyone interested? I would think the transistors would be worth $35.00. Not sure what voltages are required for PA, so complete radio would be shipped. (Or I can separate the PA section from main chassis.) Certainly be less shipping weight!!(LoL) Regards, Tim W7TRH /AFA0TP Vashon Is. Wa.
[Repeater-Builder] Re: Invar Rods
Don't know if they make an Invar flame suit, but I may need one :) What I have done in the past is obtained a piece of stainless redi-rod and short coupling nuts (female on both ends) with the same threading as the Sinclair. I then lengthen the rod by only the amount required by cutting the coupling nut and redi-rod studs to only lengthen the entire rod by 3/4 or so. This small amount when heated will only expand a fraction. It may be just what you need to counteract the contraction of Invar as it is heated. I have three duplexers in service (Q202 style) that have never had an issue. Although the temperature is pretty steady at my site. I even put them in a freezer and left them out in the sun, and there was no change in the notches or pass loss over about 50 degrees temperature difference... And yes I had a large deep freezer :) Dave Cameron VE7LTD --- In Repeater-Builder@yahoogroups.com, Chuck Kelsey wb2...@... wrote: To expand on my comment, the invar rod is there to minimize the temperature lengthening and shortening the center probe. The original design with the invar to the bottom of the piston, keeps the overall length the same and allows temperature expansion to occur at the finger stock - thus not changing the overall length. If you rotate the piston, then the piston itself can expand and contract, and change the overall length. Not as much as if no invar was used, but it will be worse than if it were kept attached were it was designed. Chuck WB2EDV - Original Message - From: Chuck Kelsey wb2...@... To: Repeater-Builder@yahoogroups.com Sent: Sunday, July 18, 2010 8:55 AM Subject: Re: [Repeater-Builder] Re: Invar Rods Not a good idea. They are attached to the bottom to keep the expansion minimized. Turning them around will defeat the purpose of having the invar in the first place. Chuck WB2EDV - Original Message - From: IM Ashford imashf...@... To: Repeater-Builder@yahoogroups.com Sent: Sunday, July 18, 2010 8:54 AM Subject: Re: [Repeater-Builder] Re: Invar Rods Just a thought, Why dont you turn the pistons around to give you a longer reach? Ian G8PWE - Original Message - From: Burt Lang b...@... To: Repeater-Builder@yahoogroups.com Sent: Saturday, July 17, 2010 4:08 PM Subject: Re: [Repeater-Builder] Re: Invar Rods What diameter are the rods? The older Sinclair VHF Hi cans used 5/16in diameter whereas the newer cans used 1/4 in daiameter. burkleoj wrote: Glenn, I need 6 of them for a Sinclair duplexer that I have. Someone cut the rods off when it was originally on a commercial frequency. The rods in my duplexer are so short that it will not tune below 147 MHz before they disappear inside the top of the cavity. Very common when the frequencies are in the high 160s I can get some dimensions for you to see if the ones you have may work. Thanks, Joe - WA7JAW You can buy invar rod material from some metal suppliers but you won't like the price. It normally comes in 12ft lengths but the dealers will cut it in half in order to ship UPS. The last time I bought some (around 1990) the price was $30/lb. The dealer was Diezel (or Diesel) Metals on Long Island somewhere. I still have some left from that order. FYI Invar is an allow consisting of exactly 35.16% nickel with the remainder iron. It is magnetic and will corrode in a damp environment leaving a green rust on the surface. Burt VE2BMQ Yahoo! Groups Links Yahoo! Groups Links No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.839 / Virus Database: 271.1.1/3013 - Release Date: 07/18/10 02:35:00 Yahoo! Groups Links No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.839 / Virus Database: 271.1.1/3013 - Release Date: 07/18/10 02:35:00
Re: [Repeater-Builder] Re: Controller recommendations
But that is specific to the 7K controller. I have the 6K and 5K versions. To my knowledge, they cannot be downloaded. Joe On 7/19/2010 2:01 PM, skipp025 wrote: Joek1ike_m...@... wrote: But does it allow you to read what is programmed in the controller? Joe Sure, I can download an entire image of the controller programming and save it. Then reprogram those contents back to the same or a different controller. Handy since I easily have 10 plus 7K Controllers (with DAB Boards) in service. S. On 7/19/2010 1:16 PM, skipp025 wrote: There is/was Windows Programming Software for all the early S-Comm Controllers. Yes it used DTMF Control over the and/or over a phone line. Once you wrote the simple text scripts to program the controller the upload was fairly painless. Yahoo! Groups Links
RE: [Repeater-Builder] Wanted - UHF Amplifier
Larry, Last week there was someone trying to sell several Henry UHF amps on the list. You may want to check your email box. Mike Mullarkey K7PFJ 6886 Sage Ave Firestone, Co 80504 303-736-9693 _ From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Larry Watkinson Sent: Monday, July 19, 2010 12:11 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Wanted - UHF Amplifier K5In and I are looking for a couple of UHF Amplifier's that will have 10 to 25 watts in and 70 to 100 watts out. We would prefer n-connectors but will accept other connectors. Thanks, Larry KC7CKO
[Repeater-Builder] Re: S-Com Controller Programming Software
Stephen Slider stephensli...@... wrote: Nope. It can only write to the controller. The original S-Com sold DTMF Software for the 7K. The Vyex 7K Digital Audio Board allows transfers both directions. Although I should mention the image transfer function was put in (by Dave) to help develop the DAB and was not generally intended to be used by owners or supported by Vyex, but the function and it's options are clearly mentioned in the DAB Manual and those functions do work very well. s. On 7/19/10 1:23 PM, Joe k1ike_m...@... wrote: But does it allow you to read what is programmed in the controller? Joe On 7/19/2010 1:16 PM, skipp025 wrote: There is/was Windows Programming Software for all the early S-Comm Controllers. Yes it used DTMF Control over the and/or over a phone line. Once you wrote the simple text scripts to program the controller the upload was fairly painless.
[Repeater-Builder] Re: Controller recommendations
Joe k1ike_m...@... wrote: But that is specific to the 7K controller. I have the 6K and 5K versions. To my knowledge, they cannot be downloaded. Joe Yeah but that's easily dealt with because you never forget what you have programmed and it's always right every time you program it. Mistakes are not allowed... s.
Re: [Repeater-Builder] Controller recommendations
At 7/19/2010 09:30, you wrote: On 7/19/2010 10:02 AM, Joe wrote: S-Com can be a love/hate relationship. The older models did not have an RS-232 interface, so you needed to keep track of everything religiously on paper. BUT, they seemed to last forever. I have a few of them and they have never glitched..never. The newer S-Com controller has all the bells and whistles, including the computer interface. 73, Joe, K1ike heh-RS-232 on a ham controller was a pretty rare bird no matter what...only a few had it...til abt 7-8 years ago or so... ...so will be be another 7-8 years before we see a USB interface on all controllers? Bob NO6B
[Repeater-Builder] Re: Controller recommendations
heh-RS-232 on a ham controller was a pretty rare bird no matter what...only a few had it...til abt 7-8 years ago or so... ...so will be be another 7-8 years before we see a USB interface on all controllers? Nah we have USB now, just in the form of little adapter boxes that convert from RS-232. And those converter boxes/adapters come with cute little under-sized CD's full of drivers that may or may not work right with your OS. s.
Re: [Repeater-Builder] dispatch consoles
It uses a VPN. Not too easy to crack. From: wd8chl wd8...@gmail.com To: Repeater-Builder@yahoogroups.com Sent: Mon, July 19, 2010 8:07:33 AM Subject: Re: [Repeater-Builder] dispatch consoles On 7/17/2010 12:47 PM, Bill Smith wrote: Used is false economy. You end with someone elses problems and high maintenance costs as well as downtime which is a bad thing for an ambulance company. The 4010 is a nice reliable system, much simpler than the RoIP stuff but not nearly as versatile. The nice part of RoIP is that by using internet connectivity, you can have it loaded on a laptop and set up dispatch anywhere there is an internet connection in the world. Bill The bad news is so can anyone else... Yahoo! Groups Links http://docs.yahoo.com/info/terms/
RE: [Repeater-Builder] dispatch consoles
give me an idea of an easy roip console. Any ideas? -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of wd8chl Sent: Monday, July 19, 2010 9:08 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] dispatch consoles On 7/17/2010 12:47 PM, Bill Smith wrote: Used is false economy. You end with someone elses problems and high maintenance costs as well as downtime which is a bad thing for an ambulance company. The 4010 is a nice reliable system, much simpler than the RoIP stuff but not nearly as versatile. The nice part of RoIP is that by using internet connectivity, you can have it loaded on a laptop and set up dispatch anywhere there is an internet connection in the world. Bill The bad news is so can anyone else...
[Repeater-Builder] Re: Strange Request
Shure got out of the land mobile microphone market 4(?) years ago. They now only deal in pro-audio. WalterH
Re: [Repeater-Builder] Controller recommendations
On 7/19/2010 3:49 PM, n...@no6b.com wrote: At 7/19/2010 09:30, you wrote: On 7/19/2010 10:02 AM, Joe wrote: S-Com can be a love/hate relationship. The older models did not have an RS-232 interface, so you needed to keep track of everything religiously on paper. BUT, they seemed to last forever. I have a few of them and they have never glitched..never. The newer S-Com controller has all the bells and whistles, including the computer interface. 73, Joe, K1ike heh-RS-232 on a ham controller was a pretty rare bird no matter what...only a few had it...til abt 7-8 years ago or so... ...so will be be another 7-8 years before we see a USB interface on all controllers? Bob NO6B Probably more-the Land Mobile mfgs are just getting around to that in the last 2-3 years...and some are better then others...
[Repeater-Builder] Andrew DB436-2 Phasing transformer
Does anyone have any information on the Andrew DB436-2 Phasing Transformer used as a phasing harness to connect two Andrew DB-436A antennas together? I need to build one for a remote RX site. I have the information on the DB-5009 dual yagi mounting bracket. Thanks, -- James Adkins, KB0NHX Vice-President -- Nixa Amateur Radio Club, Inc. (KC0LUN) www.nixahams.net Southern Missouri Assistant Frequency Coordinator - Missouri Repeater Council www.missourirepeater.org The Nixa Amateur Radio Club - There is no charge for awesomeness! (Well, only $1.00 per month)
