Re: [Repeater-Builder] GMRS and VOIP
Can you spell that out in a little less jargon, please. Also, do you not mean VOIP via GMRS? PSTN? Is this essentially saying that you can use your GMRS radio/repeater for VOIP, internet access, and what else? tnx Don At 02:09 PM 7/8/2005 +, you wrote: Hi taken from my post on another reflector Apparantly the FCC in its vast wisdom, has determined that GMRS via VOIP is ok as long as the internet medium is not PSTN. This allows DSL, cable, satelite, T1 and most everything else except dialup to be used. I have not verified this personally, but in another reflector, the initiator of this client based issue claims to have received a response from the FCC specifically addressing the question. GMRS users/repeater owners, you think you have illegal useage/interferrence now...just wait a spell. Bob, GMRS WPVV845, Amateur KG4WAD, LMRS WPXC892 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/ 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] how broad are cavities?
Thanks for the insight, Paul. The fact that they are spec'd by fairly wide ranges was the info I was hoping for. I called a friend today whose system switched from the 150 band to a 400 MHz trunked system a few years ago to see if they had any of the old cavities laying around. He said that they had just finished cleaning house last week and all the old junk went to the dumpster, but he would do some diving to see what was still there. Regards, Don At 12:03 PM 6/22/2005 -0400, you wrote: Don, 1. Cavities are roughly tuned by their physical dimensions, and then tweaked by rods, plates, etc., eh? The length of the cavity (more importantly the inner conductor of the cavity) sets the frequency. Usually cavities are designed to cover a RANGE of frequencies... the tuning rod coming out the top adjusts the length of the center conductor inside the cavity. The tuning range varies depending on manufacturer and model... some typical ranges are 136-150, 150-174, 136-174... and many others. You might want to check some of the articles referenced on the following page for more on cavity and duplexer theory: http://www.repeater-builder.com/rbtip/ant-sys-index.html There is a section on Cavities, Duplexers, etc. part way down that page. 3. How awful a compromise would it be to use available cavities from a 2 meter system at railroad frequencies (160-161 MHz) ? If the cavities will tune that high, they probably work just fine. If the are now on the 2 meter band (below 148 MHz) they may or may not tune at 160 MHz... it depends on whether the center conductor can be adjusted that far by means of the tuning rod. If you are actually referring to a duplexer (several interconnected cavities to allow use of a single antenna for transmitting and receiving) there may be other factors to consider. The cavities themselves may tune where you want them, but the length of the coaxial cables interconnecting the cavities may need to be optimized for that frequency to get best performance. The cavities may have more than one adjustment... if they are bandpass-bandreject cavities, there will be one adjustment for the length of the center conductor (usually a big knob / tuning rod) and another adjustment of some sort to set the frequency of the notch relative to the pass frequency. If you can tell us what specific cavities (or duplexer) you are looking at, some of us can probably provide more specific information. Paul 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 the Yahoo! Terms of Service.
[Repeater-Builder] how broad are cavities?
Not having built or tuned them, I'm ignorant on the following issues. 1. Cavities are roughly tuned by their physical dimensions, and then tweaked by rods, plates, etc., eh? 2. Obviously size/shape can be optimized, but are cavities for the 2 meter band essentially the same size, and the tuning is sufficient to optimize them at the desired frequency? 3. How awful a compromise would it be to use available cavities from a 2 meter system at railroad frequencies (160-161 MHz) ? Thanks, Don 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 the Yahoo! Terms of Service.
Re: [Repeater-Builder] Re: Water Tower Humidity
Seems like you'd want to have the collected water run off into a small-mouth bottle outside the cabinet so it doesn't evaporate rehumidify. At 02:48 PM 6/20/2005 -0400, you wrote: If you have a small cabinet, you might try putting a product like Damp Rid in the bottom of the cabinet. You can find it at places like Lowes and Wal-Mart. It is basically calcium chloride balls that are suspended in a strainer with a pan under it to catch the moisture as it drips off. Three of these seem to do an OK job in my 1903 vintage basement with a running spring. My idea here is along the same line as the desiccant packets that they pack some electronics in, or the air drier compressors that they hook to air dielectric feedline. You will probably need to empty the bucket and add more calcium chloride pellets every year or so, but at a cost of $3 per year, it sure beats a dehumidifier. Scott Scott Zimmerman Amateur Radio Call N3XCC 612 Barnett Rd Boswell, PA 15531 - Original Message - From: Chris [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Sunday, June 19, 2005 11:15 PM Subject: [Repeater-Builder] Re: Water Tower Humidity Thanks for all of the good tips! We're going to try and seal a cabinet with I/O fans attached to keep it cool while keeping it dry. We're also going to try the dehumidifier and seal up the area a bit better at the base. Never hurts to try, right? Thanks again! Chris 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 the Yahoo! Terms of Service.
Re: [Repeater-Builder] HAM RADIO EQUIPMENT FOR SALE (Repeater Items)
Now THAT'S a run-on sentence ! At 07:57 PM 6/15/2005 -0700, you wrote: Don't strike a deal with the guy, agreed to purchase the IFR, and since he got someone that was willing to pay right away, after he told me it would take 4 or 5 days to set up a paypal account, and when I emailed him for his callsign, informed me that the IFR had already sold after I told him I would take it. Bad way to do business. Mathew Mark A. Holman [EMAIL PROTECTED] wrote: looks like some stuff not related to ham radio .. mark h. - Original Message - From: Tommie Taylor To: Sent: Tuesday, June 14, 2005 6:28 AM Subject: [Repeater-Builder] HAM RADIO EQUIPMENT FOR SALE (Repeater Items) HAM RADIO EQUIPMENT FOR SALE 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 the Yahoo! Terms of Service.
Re: [Repeater-Builder] HAM RADIO EQUIPMENT FOR SALE (Repeater Items)
I'll take the blond ! At 10:22 PM 6/15/2005 -0400, you wrote: looks like some stuff not related to ham radio .. mark h. - Original Message - From: Tommie Taylor [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Tuesday, June 14, 2005 6:28 AM Subject: [Repeater-Builder] HAM RADIO EQUIPMENT FOR SALE (Repeater Items) HAM RADIO EQUIPMENT FOR SALE 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 the Yahoo! Terms of Service.
Re: [Repeater-Builder] Simplex repeater
I agree that hear4ing everything twice would get old quickly. What's wrong with this: The simplex repeater box listens on one freq, then retransmits on another. Everybody hears each transmission only once, albeit with a delay. Isn't the main advantage that of avoided cost? At 07:38 PM 5/18/2005 -0700, you wrote: The Zetron 19B Simplexor was the only simplex repeater that seemed to work properly, since it was designed for public-safety application, primarily for forwarding 2-tone sequential paging signals followed by a voice message. The 19B could be set to repeat the tones and message a certain number of times. Best of all, it was designed to plug into most Motorola and Kenwood commercial radios, and the voice quality was excellent. I use the word was for a reason; the 19B Simplexor was discontinued a year or so ago. Not every radio user appreciates a simplex repeater, since all listeners hear every transmission twice. That gets old, really quick! 73, Eric Lemmon WB6FLY 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 the Yahoo! Terms of Service.
Re: [Repeater-Builder] Simplex repeater
You say NOT often found in amateur radios. My recollection of the history is that way back when there was no PL capability; this was followed by transmitting 100 Hz PL; then programmable PL xmit; and now I see many more radios capable of PL encode AND decode. Our situation is that we have small local workgroups who need to converse locally, and occasionally chat with everybody in all groups. If I thought about it, I could probably figure out a best way to arrange this with simplex separate TR freqs, and different PLs. However, it might be too complicated for the average user to deal with. 73, Don At 09:00 PM 5/18/2005 -0700, you wrote: Don, You're absolutely correct. I was using the term simplex in the sense of TX and RX on the same frequency. Although certainly not a universal definition, the term half duplex is often used to describe TX and RX on two different frequencies but not simultaneously. Some might consider that practice to be wasteful of spectrum. Perhaps a more efficient alternative is to configure the simplex repeater radio to use different CTCSS tones for TX and RX. The user radios must, of course, be capable of encoding and decoding different tones, but that capability is not often found in Amateur grade radios. 73, Eric Lemmon WB6FLY Don Pomplun wrote: I agree that hearing everything twice would get old quickly. What's wrong with this: The simplex repeater box listens on one freq, then retransmits on another. Everybody hears each transmission only once, albeit with a delay. Isn't the main advantage that of avoided cost? At 07:38 PM 5/18/2005 -0700, you wrote: The Zetron 19B Simplexor was the only simplex repeater that seemed to work properly, since it was designed for public-safety application, primarily for forwarding 2-tone sequential paging signals followed by a voice message. The 19B could be set to repeat the tones and message a certain number of times. Best of all, it was designed to plug into most Motorola and Kenwood commercial radios, and the voice quality was excellent. I use the word was for a reason; the 19B Simplexor was discontinued a year or so ago. Not every radio user appreciates a simplex repeater, since all listeners hear every transmission twice. That gets old, really quick! 73, Eric Lemmon WB6FLY --- 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 the Yahoo! Terms of Service. 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/ 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 the Yahoo! Terms of Service.
RE: [Repeater-Builder] Morse Code Contest on JAY LENO
apology accepted ;=) Morse Code is no longer ham radio related 73, Don K2BIO PS Jay doesn't show up on QRZ, but maybe that's not his real name. At 01:54 PM 5/13/2005 -0500, you wrote: SORRY About the off Topic Non ham radio related post , I will try and Refrain from this in the Future , it was not My intent to offend anyone. 73 Don KA9QJG 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/ 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 the Yahoo! Terms of Service.
[Repeater-Builder] Motorola Micors
We have a bunch of Motorola Micor VHF radios just gathering dust. All were taken out of railroad service, so they operate in the 160 MHz range. So far I haven't pulled them out to see how clean they are. I'm first interested in opinions on their general value. This group seems like a good place to gather such info. I looked at model numbers. Probably a dozen are R43RTE1190BA (70 / 12 volt); other model numbers were R43RTN1190A, R73RTN3100A R43RTE1190AA. Do I have a gold mine or a bunch of boat anchors? 73 Don 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 the Yahoo! Terms of Service.
Re: [Repeater-Builder] dtmf, ctcss and pl decoding
What's that company that makes the little CTCSS encode/decode boards for $50. Is theirs a standard chip, or custom? Except for the NIH syndrome, it would seem cheaper just to add their board into your design. And, of course, DTMF decode chips are all over the place. Regards, Don At 04:35 PM 4/22/2005 -0400, you wrote: Mike Morris WA6ILQ wrote: --- Nick Papadonis [EMAIL PROTECTED] wrote: Is anyone aware of either hardware or software components to decode PL tone, DTMF and CTCSS? Open source software is preferred. There was a program called WinTone that would do this. Not sure where to find a copy of it on the internet now as they seem to have been taken off. Think the last one was version 2.02 As soon as I heard that it was being dropped I made sure that there is a copy on www.repeater-builder.com ... use the search function on the main page. Thanks Folks, but this is only an executable, no source code for FFT etc... 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/
[Repeater-Builder] GE Mastr II - what have I got?
Our local volunteer excursion railroad is growing to the point where simplex radio communications is not filling the need (adding another 3 miles of track, windy railroad, multiple trains). So going repeater is an option. I have seen articles ads about converting a GE Master Exec II series radio for repeater operation. Yesterday I was scrounging around our stash and found a single GE radio. Maybe you can tell me what I've got and its potential. Name plate data is: GE Mastr II comb MX56KAS66A ser 8493743SPL FCC TX Data KT-32-B FCC RX Data ER-64-A We also have a number of Motorola Micor series radios, and I'd welcome comments on their suitability vs the GE. TIA Don K2BIO 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/
