Re: [Repeater-Builder] Re: Midland WR-100 Weather Receiver w/S.A.M.E. Decoder Interface "HOWTO"
At 05:26 PM 4/11/2007, you wrote: >Thanks for bringing that to my attention. Looks like I better program >in some way to keep the weather receiver from hanging my repeater TOT >for hours and hours... <---Just program the Aux Audio timer you're using for your timeout period Ken -- President and CTO - Arcom Communications Makers of the world famous RC210 Repeater Controller and accessories. http://www.arcomcontrollers.com/ Coming soon - the most advanced repeater controller EVER. Authorized Dealers for Kenwood and Telewave and we offer complete repeater packages! AH6LE/R - IRLP Node 3000 http://www.irlp.net
[Repeater-Builder] Re: Midland WR-100 Weather Receiver w/S.A.M.E. Decoder Interface "HOWTO"
--- In Repeater-Builder@yahoogroups.com, "Jim B." <[EMAIL PROTECTED]> wrote: > > > --- In Repeater-Builder@yahoogroups.com, "crackedofn0de" cracked@ > > wrote: > >> I just interfaced one of these to an Arcom RC210 controller for > >> automatic announcement and broadcast of NOAA warnings in my county. > > If > >> you're interested, see below URL for a photo with the hookup points. > >> This turned out to be pretty simple and works just as an expensive > >> commercial rack mount weather receiver, but for about $40. > >> > >> http://n0de.org/k7icu/r/wr100.html > > Does that actually respond to the turn-off code? The Midland I have > doesn't shut off right away-it has a timer that goes for 5 minutes, then > shuts off the audio. Can't remember the number, WR-something, but it > looks newer then that one. > -- > Jim Barbour > WD8CHL According to the WR-100 manual: "NWS can set the active time of the alert from 15 minutes up to 6 hours. When the designated time has passed, the weather radio display message and light will automatically reset to their normal appearance." Thanks for bringing that to my attention. Looks like I better program in some way to keep the weather receiver from hanging my repeater TOT for hours and hours... (I'm not sure how you can get much newer than the WR-100. I just bought it new a few weeks ago.) James K7ICU
Re: [Repeater-Builder] Poor Mans Repeater Project anyone?
They will have to identify with /KT, /AG, and /AE accordingly. On 4/11/07, Ken Arck <[EMAIL PROTECTED]> wrote: > At 03:50 PM 4/11/2007, you wrote: > > >Perhaps some one would like to start an 'Advanced Repeater Builder' > >list on Yahoogroups? > > <---But what about Technicians, Generals & Extras? > > Ken > -- > President and CTO - Arcom Communications > Makers of the world famous RC210 Repeater Controller and accessories. > http://www.arcomcontrollers.com/ > Coming soon - the most advanced repeater controller EVER. > Authorized Dealers for Kenwood and Telewave and > we offer complete repeater packages! > AH6LE/R - IRLP Node 3000 > http://www.irlp.net > >
Re: [Repeater-Builder] Poor Mans Repeater Project anyone?
>From: Ken Arck <[EMAIL PROTECTED]> >Reply-To: Repeater-Builder@yahoogroups.com >To: Repeater-Builder@yahoogroups.com >Subject: Re: [Repeater-Builder] Poor Mans Repeater Project anyone? >Date: Wed, 11 Apr 2007 15:53:27 -0700 > >At 03:50 PM 4/11/2007, you wrote: > > >Perhaps some one would like to start an 'Advanced Repeater Builder' > >list on Yahoogroups? > ><---But what about Technicians, Generals & Extras? > >Ken Slap >wet fish >-- >President and CTO - Arcom Communications >Makers of the world famous RC210 Repeater Controller and accessories. >http://www.arcomcontrollers.com/ >Coming soon - the most advanced repeater controller EVER. >Authorized Dealers for Kenwood and Telewave and >we offer complete repeater packages! >AH6LE/R - IRLP Node 3000 >http://www.irlp.net > _ Advertisement: Meet Sexy Singles today at Lavalife - Click here http://a.ninemsn.com.au/b.aspx?URL=http%3A%2F%2Flavalife9%2Eninemsn%2Ecom%2Eau%2Fclickthru%2Fclickthru%2Eact%3Fid%3Dninemsn%26context%3Dan99%26locale%3Den%5FAU%26a%3D27783&_t=762229680&_r=lavalife_apr07_meetsexysingles&_m=EXT
Re: [Repeater-Builder] Poor Mans Repeater Project anyone?
At 03:50 PM 4/11/2007, you wrote: >Perhaps some one would like to start an 'Advanced Repeater Builder' >list on Yahoogroups? <---But what about Technicians, Generals & Extras? Ken -- President and CTO - Arcom Communications Makers of the world famous RC210 Repeater Controller and accessories. http://www.arcomcontrollers.com/ Coming soon - the most advanced repeater controller EVER. Authorized Dealers for Kenwood and Telewave and we offer complete repeater packages! AH6LE/R - IRLP Node 3000 http://www.irlp.net
Re: [Repeater-Builder] Poor Mans Repeater Project anyone?
6M ? a very interesting band currently , I will be reading along . >From: KD5SFA <[EMAIL PROTECTED]> >Reply-To: Repeater-Builder@yahoogroups.com >To: Repeater-Builder@yahoogroups.com >Subject: Re: [Repeater-Builder] Poor Mans Repeater Project anyone? >Date: Wed, 11 Apr 2007 14:15:43 -0400 (EDT) > >Sounds like fun to me. >In fact I've been tasked to help with just >that sort of thing for a group. Probably a local >split site on 6m using 70cm as a link. > >73, >Jon >KD5SFA >-Original Message- > >From: skipp025 <[EMAIL PROTECTED]> > >Sent: Apr 11, 2007 2:02 PM > >To: Repeater-Builder@yahoogroups.com > >Subject: [Repeater-Builder] Poor Mans Repeater Project anyone? > > > >Re: Poor Mans Repeater Project anyone? > > > >Would some of you group members be interested in a "Poor Mans > >Repeater Project" as described below? > > > >The project goal would be to construct a simple repeater using > >various/mixed radio parts. We as a group would talk about various > >portions of the repeater during actual construction of a project > >by at least one or two (probably more) group members. > > > >The project would more likely be surplus two-way conversion and/or > >ki-built related radio equipment as anyone can buy a pre-made > >repeater system. > > > >We'd toss around a few ideas first and then try to aquire > >equipment and make it work as best possible. > > > >Converted mobile radios..? Converted base or commercial repeaters? > >Junk bought off ebay... yadda yadda. Duplexer... no duplexer, high > >power, low-power. You get the idea... > > > >Might be fun and a way to get good information and various > >opinions out to the group. A lot of you don't have the money for > >some of these bells and whistles we talk about. So why not go > >back to our roots and build a repeater from scratch. > > > >Anyone interested? > > > >cheers, > >skipp > > > > > > > > > > > > > >Yahoo! Groups Links > > > > > > > _ Advertisement: Its simple! Sell your car for just $30 at carsales.com.au http://a.ninemsn.com.au/b.aspx?URL=http%3A%2F%2Fsecure%2Dau%2Eimrworldwide%2Ecom%2Fcgi%2Dbin%2Fa%2Fci%5F450304%2Fet%5F2%2Fcg%5F801577%2Fpi%5F1005244%2Fai%5F838588&_t=754951090&_r=tig&_m=EXT
Re: [Repeater-Builder] Poor Mans Repeater Project anyone?
Perhaps some one would like to start an 'Advanced Repeater Builder' list on Yahoogroups? On 4/11/07, Barry C' <[EMAIL PROTECTED]> wrote: > > Pretty simple really , maybe 25 watts max but the fun starts with the > controller . > > >From: "skipp025" <[EMAIL PROTECTED]> > >Reply-To: Repeater-Builder@yahoogroups.com > >To: Repeater-Builder@yahoogroups.com > >Subject: [Repeater-Builder] Poor Mans Repeater Project anyone? > >Date: Wed, 11 Apr 2007 18:02:44 - > > > >Re: Poor Mans Repeater Project anyone? > > > >Would some of you group members be interested in a "Poor Mans > >Repeater Project" as described below? > > > >The project goal would be to construct a simple repeater using > >various/mixed radio parts. We as a group would talk about various > >portions of the repeater during actual construction of a project > >by at least one or two (probably more) group members. > > > >The project would more likely be surplus two-way conversion and/or > >ki-built related radio equipment as anyone can buy a pre-made > >repeater system. > > > >We'd toss around a few ideas first and then try to aquire > >equipment and make it work as best possible. > > > >Converted mobile radios..? Converted base or commercial repeaters? > >Junk bought off ebay... yadda yadda. Duplexer... no duplexer, high > >power, low-power. You get the idea... > > > >Might be fun and a way to get good information and various > >opinions out to the group. A lot of you don't have the money for > >some of these bells and whistles we talk about. So why not go > >back to our roots and build a repeater from scratch. > > > >Anyone interested? > > > >cheers, > >skipp > > > > _ > Advertisement: Visit LetsShop.com to WIN Fabulous Books Weekly > http://a.ninemsn.com.au/b.aspx?URL=http%3A%2F%2Fwww%2Eletsshop%2Ecom%2FLetsShopBookClub%2Ftabid%2F866%2FDefault%2Easpx&_t=751480117&_r=HM_Tagline_books&_m=EXT > > > > > > > Yahoo! Groups Links > > > >
RE: [Repeater-Builder] Poor Mans Repeater Project anyone?
Pretty simple really , maybe 25 watts max but the fun starts with the controller . >From: "skipp025" <[EMAIL PROTECTED]> >Reply-To: Repeater-Builder@yahoogroups.com >To: Repeater-Builder@yahoogroups.com >Subject: [Repeater-Builder] Poor Mans Repeater Project anyone? >Date: Wed, 11 Apr 2007 18:02:44 - > >Re: Poor Mans Repeater Project anyone? > >Would some of you group members be interested in a "Poor Mans >Repeater Project" as described below? > >The project goal would be to construct a simple repeater using >various/mixed radio parts. We as a group would talk about various >portions of the repeater during actual construction of a project >by at least one or two (probably more) group members. > >The project would more likely be surplus two-way conversion and/or >ki-built related radio equipment as anyone can buy a pre-made >repeater system. > >We'd toss around a few ideas first and then try to aquire >equipment and make it work as best possible. > >Converted mobile radios..? Converted base or commercial repeaters? >Junk bought off ebay... yadda yadda. Duplexer... no duplexer, high >power, low-power. You get the idea... > >Might be fun and a way to get good information and various >opinions out to the group. A lot of you don't have the money for >some of these bells and whistles we talk about. So why not go >back to our roots and build a repeater from scratch. > >Anyone interested? > >cheers, >skipp > _ Advertisement: Visit LetsShop.com to WIN Fabulous Books Weekly http://a.ninemsn.com.au/b.aspx?URL=http%3A%2F%2Fwww%2Eletsshop%2Ecom%2FLetsShopBookClub%2Ftabid%2F866%2FDefault%2Easpx&_t=751480117&_r=HM_Tagline_books&_m=EXT
[Repeater-Builder] S-Com 7K firmware info
Hi Mike, The 7K version you mention works with the Vyex board... many people don't have a dab (yet). The firmware fix for the problem I mention was done a bit before the Vyex board came out so I know it is available for controllers without the dab installed. For that version you should see the SCom web site for information. The 7K Controller with a Vyex Digital Audio Board is just killer. Even the unsupported commands like saving the ram contents to the mmc card and reloading the file into a different controller through the rs-232 work wu'da ba! Makes the 7K well worth keeping around. cheers, skipp >, Mike Morris WA6ILQ <[EMAIL PROTECTED]> wrote: > At 10:25 AM 04/11/07, you wrote: > > For what its worth the latest version is 2.04F from Vyex. Dave ships > that version with his replacement sound card that drops into the 7K. > I don't know if it's available without the card. > In addition to a number of bug fixes, it's worth it just for the > IF-THEN-ELSE function, the increased flexibility on the PL encoder > control, and the independent timeout timers on each receiver (the > stock 7K had one timeout timer, but you could play games with the > receiver activity macros). > > > >Make sure you have the latest firmware available for your > >specific 7K Controller. One of the early version firmwares > >had a problem with the 2nd port carriers/ctcss and how the RBI > >worked with it. There was an update to that early firmware set. > > > >cheers, > >skipp
Re: [Repeater-Builder] Poor Mans Repeater Project anyone?
On 4/11/07, skipp025 <[EMAIL PROTECTED]> wrote: > Re: Poor Mans Repeater Project anyone? I'd be interested in reading along and learning, but I'm not sure how much I could help -- I was mentored by MASTR II guys... They work so well for just about any type of project (Joe's 6m split-site is easy with a 6m and a UHF Mastr II mobile pair to swap parts around in!) that I don't know much else... But I'll watch, learn, and comment if I think I have anything useful to add... Pretty much, I'd consider myself a "poor man" when it comes to repeaters -- I work on club systems to feed my habit... since club members help foot the overall bill, and we all get to enjoy the results. That's probably one thing many budding repeater-builders don't realize... if you get sucked in, even a club paying for parts won't save you... you'll end up buying test gear, good cables for bench testing, good quality adapters and connectors, etc etc etc... it becomes a "lifestyle choice" to blow money on stupid repeater related "stuff"... to put it politically-correctly. Add in a weak-signal VHF+ "habit" and well, it's easy to be broke all the time, but as long as it's fun... why not? Cheap, well-engineered, and soon... pick any two! (As the saying goes!) Nate WY0X
[Repeater-Builder] Re: Poor Mans Repeater Project anyone?
Wesley; I'm interested in your work with the UHF Mitrek setup. I already have one that was built up by another local Ham; but it seems a little deaf. I'm pretty sure that he used some of the reference information from the main (Repeater-builder.com) site; and thus far, I haven't ruled out its problems being more site related than equipment related. In my case, I'm building up a replacement; and plan to use the Mitrek configuration for my backup as well. ... mind if I tag along? <<< vern >>> --- In Repeater-Builder@yahoogroups.com, Richard W W Bazell Jr <[EMAIL PROTECTED]> wrote: > > Sound good to me. Would certainly like to observe & learn. > Have a project going of converting an Motorola Mitrek UHF as an Backup > for an Repeater that I have in operation. > > Wesley AB8KD >
[Repeater-Builder] Re: Poor Mans Repeater Project anyone?
This sounds very interesting; I don't know how much I could contribute, but I'd like to at least read along, and perhaps toss in a comment or question every once in a while. In a way it goes along with a similar project I have been working on, that being a portable Emergency Repeater. In my case, I specifically want/need to avoid using duplexers; since the base equipment requirements includes spur-of-the-moment cross-banding (even to/from commercial band, police and fire band frequencies). In our area I/we already have an application/need for this sort of setup as part of our Emergency Response equipment. I have been looking into using vertical separation in place of duplexers; but I haven't tried it much yet. I've also been looking at passive repeaters, using two beam antennas and a piece of low-loss coax. Both of these have caught my interest, since I already have a portable tower platform to work from. In any case, I'm interested; but I am concerned that your project will become too big of a discussion for a single message thread. You may want to setup some message title infrastructure upfrount, so that sub-topics can work from similar related threads and still work with searches and filters. <<< vern >>>
Re: [Repeater-Builder] Poor Mans Repeater Project anyone?
I was hoping to start an open source built from scratch repeater project, that would be board style, kinda like Scotty's spectrum analyzer. But someone said there may not be enough intrest in it at the time. Perhaps people are intrested now?
Re: [Repeater-Builder] Poor Mans Repeater Project anyone?
Sound good to me. Would certainly like to observe & learn. Have a project going of converting an Motorola Mitrek UHF as an Backup for an Repeater that I have in operation. Wesley AB8KD
Re: [Repeater-Builder] Poor Mans Repeater Project anyone?
At 4/11/2007 11:02 AM, you wrote: >Re: Poor Mans Repeater Project anyone? > >Would some of you group members be interested in a "Poor Mans >Repeater Project" as described below? > >The project goal would be to construct a simple repeater using >various/mixed radio parts. We as a group would talk about various >portions of the repeater during actual construction of a project >by at least one or two (probably more) group members. I'm just starting on my 3rd GE MVP VHF portapeater. #1 is locked up in a tower; I guess that makes it a "permapeater" now. No regrets - it's still accessible & has on-off control via an open-drain output of a controller on a co-located 440 system, plus it was cheap: radio & mobile duplexer were free, IDer was an old Autocode board out of my junkbox, homebrew audio/keying circuit & used pre-existing GP9 antenna with crossband diplexer. Only thing I remember explicitly buying for the system was the crystals. #2 got pressed into standard 600 kHz repeater service (sans mobile duplexer, of course). Anyway, I started on #3 by grabbing a VHF MVP out of the garage & throwing in on the bench. I test before I do any converting so I don't waste time converting a dog. I pay particular attention to the TX, as RXs are easy to swap but if the RFPA has a problem it's easier to just use another chassis with a working RFPA. It tuned up fine: 32 W on 144.93, & 0.35 µV for 12 dB SINAD @ 147.585. One coil in the IF section was way off for some reason, but everything's playing fine now so time to start the conversion (convert to duplex & bring all needed I/O out the rear 10-pin system connector). I'll also be installing the VHF UHS preamp I bought from Kevin at the '05 Hamvention to see if it will handle the mobile duplexer isolation. I need to squeeze as much sensitivity as I can out of this one, even if it means adding an additional filter, sized within reason (not a 10" 1/4 wave Motorola bottle!). Bob NO6B
Re: [Repeater-Builder] Re: MSR2000 UHF REPEATER PL TONE
At 10:25 AM 04/11/07, you wrote: >Make sure you have the latest firmware available for your >specific 7K Controller. One of the early version firmwares >had a problem with the 2nd port carriers/ctcss and how the RBI >worked with it. There was an update to that early firmware set. > >cheers, >skipp For what its worth the latest version is 2.04F from Vyex. Dave ships that version with his replacement sound card that drops into the 7K. I don't know if it's available without the card. In addition to a number of bug fixes, it's worth it just for the IF-THEN-ELSE function, the increased flexibility on the PL encoder control, and the independent timeout timers on each receiver (the stock 7K had one timeout timer, but you could play games with the receiver activity macros).
RE: [Repeater-Builder] Poor Mans Repeater Project anyone?
Skipp / all, I'm kinda doing this particular thing now - constructing a repeater from "pieces-parts" (i.e. mobile radios, controller, power amplifier, power supply, etc) for 900MHz... although I'm not down to "board-level" construction of the machine. That being said, I'd also be interested in following such a thread. One thing, though -- the conversion of a mobile into a repeater has already been done (and expertly, I might add) with both the Micor and Mastr-II mobiles on the Repeater-Builder website... However, (that was for you, Skipp! Hehehe) employing a different mobile unit, certainly! I'd just hate to reinvent the wheel. Mark - N9WYS -Original Message- From: Repeater-Builder@yahoogroups.com On Behalf Of KD5SFA Sounds like fun to me. In fact I've been tasked to help with just that sort of thing for a group. Probably a local split site on 6m using 70cm as a link. 73, Jon KD5SFA -Original Message- >From: skipp025 <[EMAIL PROTECTED]> > >Re: Poor Mans Repeater Project anyone? > >Would some of you group members be interested in a "Poor Mans >Repeater Project" as described below? > >The project goal would be to construct a simple repeater using >various/mixed radio parts. We as a group would talk about various >portions of the repeater during actual construction of a project >by at least one or two (probably more) group members. > >The project would more likely be surplus two-way conversion and/or >ki-built related radio equipment as anyone can buy a pre-made >repeater system. > >We'd toss around a few ideas first and then try to aquire >equipment and make it work as best possible. > >Converted mobile radios..? Converted base or commercial repeaters? >Junk bought off ebay... yadda yadda. Duplexer... no duplexer, high >power, low-power. You get the idea... > >Might be fun and a way to get good information and various >opinions out to the group. A lot of you don't have the money for >some of these bells and whistles we talk about. So why not go >back to our roots and build a repeater from scratch. > >Anyone interested? > >cheers, >skipp
Re: [Repeater-Builder] Poor Mans Repeater Project anyone?
skipp025 wrote: > Re: Poor Mans Repeater Project anyone? > > Would some of you group members be interested in a "Poor Mans > Repeater Project" as described below? Back in the 70's I breadboarded a VOX circuit that used a diode voltage doubler driving a big cap and a NPN transistor keying a small reed relay. I put a "ouncer" telephone transformer in line, and a .01 cap and pot in series for the repeat audio path. I mounted it all in a little project box I had, two terminal strips for I/O. Plug the input into the speaker jack on a rx radio, and mic and PTT into the tx radio and off you go. Users had to voice ID it as they ID'ed. Ran that at a couple of hamfests years back, rx was an Icom IC-22A or 22S, tx was a KDK FM144 on 1W. Toss it under the seat, gain antenna on the roof for rx, rubber duck or 1/4-wave mag mt under the car (or in the trunk)for tx. Sounded like crap, but it worked. -- Jim Barbour WD8CHL
Re: [Repeater-Builder] Poor Mans Repeater Project anyone?
Sounds like fun to me. In fact I've been tasked to help with just that sort of thing for a group. Probably a local split site on 6m using 70cm as a link. 73, Jon KD5SFA -Original Message- >From: skipp025 <[EMAIL PROTECTED]> >Sent: Apr 11, 2007 2:02 PM >To: Repeater-Builder@yahoogroups.com >Subject: [Repeater-Builder] Poor Mans Repeater Project anyone? > >Re: Poor Mans Repeater Project anyone? > >Would some of you group members be interested in a "Poor Mans >Repeater Project" as described below? > >The project goal would be to construct a simple repeater using >various/mixed radio parts. We as a group would talk about various >portions of the repeater during actual construction of a project >by at least one or two (probably more) group members. > >The project would more likely be surplus two-way conversion and/or >ki-built related radio equipment as anyone can buy a pre-made >repeater system. > >We'd toss around a few ideas first and then try to aquire >equipment and make it work as best possible. > >Converted mobile radios..? Converted base or commercial repeaters? >Junk bought off ebay... yadda yadda. Duplexer... no duplexer, high >power, low-power. You get the idea... > >Might be fun and a way to get good information and various >opinions out to the group. A lot of you don't have the money for >some of these bells and whistles we talk about. So why not go >back to our roots and build a repeater from scratch. > >Anyone interested? > >cheers, >skipp > > > > > > >Yahoo! Groups Links > > >
[Repeater-Builder] Poor Mans Repeater Project anyone?
Re: Poor Mans Repeater Project anyone? Would some of you group members be interested in a "Poor Mans Repeater Project" as described below? The project goal would be to construct a simple repeater using various/mixed radio parts. We as a group would talk about various portions of the repeater during actual construction of a project by at least one or two (probably more) group members. The project would more likely be surplus two-way conversion and/or ki-built related radio equipment as anyone can buy a pre-made repeater system. We'd toss around a few ideas first and then try to aquire equipment and make it work as best possible. Converted mobile radios..? Converted base or commercial repeaters? Junk bought off ebay... yadda yadda. Duplexer... no duplexer, high power, low-power. You get the idea... Might be fun and a way to get good information and various opinions out to the group. A lot of you don't have the money for some of these bells and whistles we talk about. So why not go back to our roots and build a repeater from scratch. Anyone interested? cheers, skipp
[Repeater-Builder] Re: MSR2000 UHF REPEATER PL TONE
Make sure you have the latest firmware available for your specific 7K Controller. One of the early version firmwares had a problem with the 2nd port carriers/ctcss and how the RBI worked with it. There was an update to that early firmware set. cheers, skipp > I decided to leave the PL tone on the tranmitter all the time as > recommended by a few folks. Interfaced to the 7K and every thing > but the RBI is working just great. The RBI has the ability to go > west now and then and we are unable to transmit on the remote. > Got some more work to do with it... > Thanks guys it should be a great repeater and vhf remote base. > 73 > Doug VE5DA
[Repeater-Builder] Re: Tuning duplexers with sweep generator?
<<< see embedded responses (w/VERN prefix) below >>> --- In Repeater-Builder@yahoogroups.com, "skipp025" <[EMAIL PROTECTED]> wrote: > > A quick reply... > > > "w6nct" wrote: > > I am setting up my duplexer using four Phelps-Dodge cavities (all > > in series for Rx), and two Cell-wave cavities (in series for Tx). > > All of these are individual, cylindrical, PASS-REJECT cavities. > > Are the 5 or 8 inch... or some other size diameter cavities? VERN: All are approximately 4" diameter by 8" long. > > At this point, I have a setup and test methodology to tune the > > PASS and REJECT adjustments; and have done so for the individual > > Phelps-Dodge cavities (mostly as a pre-tune and confidence > > building exercise). > > Nothing wrong with taking the time to learn... I do it all the time > and it really pays off. > > Undestand a single cavity adjusted location will be different from > a dual series cavity setup... and different from a triple cavity > setup. Broadly speaking you might see how additional cavities change > the final adjustments. So starting from scratch you'll get single > cavities in the ballpark and the final assembly will require a > second or third final adjustment. VERN: What I've noticed already is that if I use "bad" interconecting cables (i.e., lossy, or ones not near odd 1/4 wave in electrical length); then the combination of multiple cavities in series changes a lot. But the closer the interconnecting cables are to "good" ones, the less I need to re-tune once I connect the cavities in series. I've also noticed that I can work to tune up a duplexer system with "less than ideal" cables; but it's much more difficult and touchy, and doesn't seem to provide as good of an end-result. I expect that the duplexer system will work much better (i.e., more stable and and more efficient) if I invest the time into setting up the best interconnecting cables I can. I'm expecting that I may have a bit more of adjustment when I connect the Tx string to the Rx string, using the T-connector; since the two strings are tuned for different frequencies. We'll see... > > I have not re-tuned them in the full duplexer system configuration > > as I am still > trying to make up the "proper" length cables (see > > other related topic thread, "measuring coax for duplexer"). I'm > > still a little stuck in making these cables, due to the unknown > > length and velocity factor for the loop inside the cavities. If > > you have any thoughts on this topic, please add them to the > > associated thread. > > You didn't mention the type of coax you are using...? > Consider the physical loop/probe length to be added to > the coax length. The coax will have a velocity factor > of say... .66 to .93 typical and the internal loop/probe > length is most often considered free space, which is > also known as vel= 1.0 > > I don't march with the crowd on this one... every time > I try to follow the various posted cable length text the > results never seem to work out. So I use my own methods > and test gear, which gives me the nearly exact performance > of the specific network I'm working with. If you want > some rules of thumb I like to consider... I'd need to > know more about the cavity loops/probe assemblies. Email > me direct if you like. VERN: I'm using RG-400 (Vf=0.695), using N-connectors on Phelps-Dodge and BNC on Cell-wave cavities. Several from this repeater group have indicated that the loops (one per port) inside adds to the length; even though Hams local to me aren't convinced. I've already decided to believe the group's experts; but I am having a bit of problem determining "how much length it adds". I suspect that if I had a TDR I could tell; but I haven't found a way to get my MFJ to tell me. I hand-calculated a starting length for the cable alone; and using that as a test/reference cable, I have been trying to measure the internal loops of the cavities. The measurements I have taken (in trying to figure it out experimentally) have shown that the apparent/combined electrical length (i.e., reference cable plus single cavity loop) change dramatically if I change the cavities bandpass adjustment; and it is also dramatically different depending on what I do with the other port (e.g., open, 50-ohm termination, or 0-ohm termination). Thus far, I haven't figured it out; or decides what termination is appropriate. Perhaps I should buy an extra cavity and cut it open to see what's really inside (?). > > Beyond that, I have the Tx/Rx sections of the repeater > > operational; and am trying to figure out how to best > > interface my (NHRC-5) controller and (ComSpec TS32) PL > > decoder/encoder (see other related topic thread, > > "Controller connection to RPT-21"). This portion is > > still in progress, trying to figure things out. > > If you have any thoughts on this topic, please add > > them to the associated thread. > > An original Standard RPT-21
Re: [Repeater-Builder] Re: MSR2000 UHF REPEATER PL TONE
At 04:07 PM 4/10/2007, you wrote: >However,(I just like writing "however,") > >The PL-Disable switch is probably wired for local speaker >audio. To force tx ctccs off would require additional work. > >Don't know if the mentioned mod will allow you to toggle rx ctcss >on/off as the mod I describe does. > >With the mentioned mod you also lost the msr dual function squelch >operation so rx audio squelch crashes are probably always heard >unless you use an external audio delay module with your controller. > >Why would you not want ctcss encode on your repeater tx signal? > >cheers, >skipp > > > > "Jim B." <[EMAIL PROTECTED]> wrote: > > uhhh-yes-that is normal for all repeaters and base stations. > > It is more frequently called 'monitor' however. It is used to > > disable the CTCSS decoder. It is a requirement on commercial > > freqs to make certain that you are not interfering with another > > transmission on the freq, usually by temporarily disabling the > > decoder and listening carrier squelch. > > -- > > Jim Barbour > > WD8CHL > > > > > > Doug wrote: > > > I have just about completed setting up the MSR2000 as per the > > > article by K4HAL and WA6ILQ and it appears to work just great. > > > I have to interface it to the 7k and Doug Hall interface and > > > it will be ready to go. All the cabling is done. The only option > > > cards left in are the TOT and the Station Control card. > > > > > > However, when I key the radio, it appears the pl tone is being > > > transmitted all the time. The PL DISABLE switch has no affect > > > on it. Is this normal?? -- I decided to leave the PL tone on the tranmitter all the time as recommended by a few folks. Interfaced to the 7K and every thing but the RBI is working just great. The RBI has the ability to go west now and then and we are unable to transmit on the remote. Got some more work to do with it... Thanks guys it should be a great repeater and vhf remote base. 73 Doug VE5DA
Re: [Repeater-Builder] IC-F121 horn line (COS line) voltage / current limitations
Try this: http://www.prestonmoore.com/repeater.html Notice the schematic for the ICS controller and the resistor placement for negative COS. Also, the image at the bottom gives you the particular on the pinouts. Preston Moore >Hi there I'm puting together a repeater package for >our local ham group >and run into a bit of a snag the IC-F121 radios >external COS signal is >active low but only floats around 0.9 volts the >controller I've got to >work with is a Crayfield CD-3P controller and it >doesn't reconize the >signal since the swing is so small. The easy solution >is to use a relay >to invert the signal, but I'm not sure what voltage/ >Amperage the horn >line on the radio will handle. Is there any one who >can help? > >Sean Don't get soaked. Take a quick peak at the forecast with the Yahoo! Search weather shortcut. http://tools.search.yahoo.com/shortcuts/#loc_weather
