[Repeater-Builder] Re: OT? OT? OT? email notifications
These are a new *feature* called 'Update Notification'. There should be an Unsubscribe button or link at the bottom of the messages. Or, you can turn them off from the MyGroups page on Yahoo! Groups. WalterH PS: I recommend that the owners/mods of this group [or any group] join 'Moderator Central', the official Yahoo! Groups notifier, and 'YGOG', a self-help group for owner/mods. --- In Repeater-Builder@yahoogroups.com, wb6dgn wb6...@... wrote: Can someone please tell me how to stop the email notifications when a new file is posted to the group? Every time a new file is posted in any of my active yahoo groups, not just this one, I get an email notification that the file has been posted on all of my email accounts (three of them!). I've searched until I'm nearly blind trying to find a setting in my yahoo profile and this membership page, that I can change, to no avail. My membership settings on all my groups also indicate NO email. I just don't know where else to look. HEEEL! Thanks, Tom
[Repeater-Builder] Re: Intermod Calculation
We also had a problem with a 454 pager. Quintron with a 1/4 k amp. Only one in the metro area had a spur, but that one traveled as the PA cage changed temperature. Got a hold of the paging company, and they turned each one off until we saw the spur go away. Final tube had been replaced and not properly neutralized. WalterH --- In Repeater-Builder@yahoogroups.com, Tom W2MN w...@... wrote: We had a pager spur problem with our repeater (no pl). The problem would come and go. We determined it happened mostly with time of day (outside temperature). Sometime it was just a short 1 second event and sometimes it would hold for a bit more (maybe 2 -5 sec). We setup a satellite multimode radio (actually dial in the frequency with widest bandwidth setting) and monitored the repeater input with a tape recorder and vox. We did this to capture the audio so we could listen to characteristics and THE CW CALLSIGN. We captured enough of the callsign that we were able to indentify the whole call (and freq) from the FCC database. With that, we were able to monitor the repeater and the pager for hits. Yes, it did hit some times and not others. The reason was, it was caused by an unstable spur that drifted up and down the ham band with temperature and the amount of pager traffic. It was also hitting other repeaters as it drifted but most of the other repeaters had pl. There was a chain of pagers using the same freq and callsign and we had to figure out which tower it was. We used a beam antenna and chased the spur up/down the band until we were able to get a definite direction. The next step as to visit the site AREA with an HT and just scan the ham repeater input freqs during the likely time of day. Bingo, the spur was loud and clear!. Of course the pager owner was in denial but being a pest for a couple of weeks got the problem removed. They claim it was a spur in the final PA that had been serviced just at the time the problem started. They replaced the PA. Hope this story helps. Tom
[Repeater-Builder] Re: GMRS Radio
Garbage. Power is limited to 50 watts out of the transmitter. Absolutely no ERP limitations. WalterH WPXP269 Re: [Repeater-Builder] Re: GMRS Radio Bear in mind that GMRS XMT power is limited to 40 watts ERP. Dick
[Repeater-Builder] Re: Mastr II Mobile Repeater?
Close but no cigar. What you describe is MTS, Mobile Telephone Service. All calls were handled by a Bell operator. This was replaced by IMTS, Improved Mobile Telephone Service. These channels had 2 letter designations, like YL or JS. [Interesting note; there used to be a low band phone service, too.] RCC refers to the private entities [non-Bell] that provided mobile telephone service. I worked for one in central NH. That particular one was 454/459 MHz with 2805 Hz overdial. I also did service on another provider's hi-band system. In the 80's, some were fully automatic like the one I worked for, and some still had operators to handle the calls. They were all RCC's. All those systems went away with the advent of cell phones. And the frequencies put up for auction. WalterH --- In Repeater-Builder@yahoogroups.com, bil.isom bil.i...@... wrote: RCC = Radio Common Carrier. The OLD mobile telephone service. Before IMTS (Improved Mobile Telephone Service) and long before cell. BTW Perry Mason used RCC Bill N4XIR --- In Repeater-Builder@yahoogroups.com, La Rue Communications LaRueComm@ wrote: Gentlemen (And Ladies) I have a MASTR II Exec mobile here, I think its a UHF Repeater. I want to confirm with you - but I am curious what RCC stands for. Comb number YS55SSXX88A. Nothing comes up on Google and not sure which Comb spec sheet to look this up with Hall Electronics or here on RB Archives. Thanks for your input! John Hymes La Rue Communications 10 S. Aurora Street Stockton, CA 95202 http://tinyurl.com/2dtngmn
[Repeater-Builder] Re: UHF Isolator Wanted
Single? Dual? Frequency [not just band] Power ratings? Connectors? WalterH --- In Repeater-Builder@yahoogroups.com, K5IN k...@... wrote: Ok, one last try. I need a UHF isolator and thought I would ask here again. Brian, K5IN
[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
[Repeater-Builder] Re: Duplexer notch blurred - why?
Your pic shows the classic signs of an incorrect cable length. Did you include the effective length of the coupling loops in your calculations? Our rule of thumb is that they are 1/10th wavelength. Otherwise, do what EMR does and try cable lengths until it meets specs. WalterH --- In Repeater-Builder@yahoogroups.com, Atlantis atlant...@... wrote: Hi In the attached picture you see the notch of the 70cm duplexer I built according to W4NFR's description in QEX, those who can't receive attachments find it here: http://conturafm.mine.nu/_fh/438.95_notch.bmp The measurement has been made with both cavities of one branch connected with a true quarter wavelength jumper of RG58 because I had no double-shielded cable available. Can anybody tell me why the notch is this blurred and what can be done about it? The isolation would be a bit better if the notch was a clear sharp line, isn't it? Regards Martin
[Repeater-Builder] Re: Duplexer notch blurred - why?
The duplexor referenced is shown at: http://www.lu3hba.com.ar/ARTICULOS%2010/duplexor%20440%20mhz.pdf The author's spec a screen shots only show 60-65 dB of notch. And he doesn't make critical length cables. WalterH --- In Repeater-Builder@yahoogroups.com, Larry Horlick llhorl...@... wrote: -62 does seem a tad high. Describe the duplexer... SNIP
[Repeater-Builder] Re: Verizon Tarif
Every place I know of, all you need is a business line. WalterH --- In Repeater-Builder@yahoogroups.com, rahwayflynn mafl...@... wrote: Anyone know if Verizon has a published tarif for repeater interconnects? (Amateur Radio, not LMR)
[Repeater-Builder] Re: Just curious... Microwave frequencies
Microwave is NOT 'a band'. It usually refers to frequencies used for point-to-point RF links. 220 MHz was considered 'microwave' way back when. As someone else mentioned, there are a NUMBER of microwave bands. My agency uses 2, 6, 10, 11, and 23 GHz depending on path length, required bandwidth, and availability. I think our widest beamwidth is 3 degrees. Most are MUCH tighter. Our 'radar' guns [microwave speed meters]run on 24 40 GHz. Your microwave oven operates at 2.45 GHz [the resonant frequency of water molecules]. WalterH --- In Repeater-Builder@yahoogroups.com, La Rue Communications laruec...@... wrote: So in a nutshell, microwave is a band of precision and pinpoint accuracy? Common sense that people shouldnt use wood for anything outside that demands long-term stability. Not only do the elements cause warping, but also prone to termites, etc. Wow! Thanks for all the good input! John Hymes La Rue Communications 10 S. Aurora Street Stockton, CA 95202
[Repeater-Builder] Re: NOS GE Phoenix For Sale
You mean 'WERE' made by Shure, who no longer makes communications microphones. GE/ComNet/Ericsson/M-A Com/Tyco/Harris now uses mics from Otto Engineering http://www.ottoexcellence.com/comm/index.htm WalterH --- In Repeater-Builder@yahoogroups.com, Kris Kirby k...@... wrote: On Sun, 28 Mar 2010, Joe wrote: Which mike are you looking for? I may have a NOS one somewhere, handheld with Whelen written on it. MCH wrote: I think the 200 was 16 channels with an option for 32 channels. While I'm typing, does anyone have a source for a replacement Whelen microphone element? I can't justify $150 for one from Whelen. Even a source for a good used Whelen mic would be welcome. And sorry about the off-topic post relative to the subject. Please direct any replies to my email address rather than the list. It would be cheaper to ask around and see if someone has a microphone that some dip destroyed out on the road, and put the Whelen cable on the two-way mic. Most of the Motorola - MA/COM mics are made by Shure anyway. -- Kris Kirby, KE4AHR Disinformation Analyst
[Repeater-Builder] Re: Correction...
What's an 'RLC'? WalterH --- In Repeater-Builder@yahoogroups.com, NORM KNAPP nkn...@... wrote: Those are IDA RLC's to Mastr III's. My bad. Norm
[Repeater-Builder] Re: Fw: FCC RO Involving the Amateur 70cm Band
And what happens if they deploy it in a municipality where there's a 4.9 GHz mesh network [like Phoenix, AZ]? Or a 4.9 GHz point-to-point microwave link? Or in the presence of a 4.9 GHz helicopter downlink? Frequency selection/coordination is a very big deal, and most of the IT/MBA types running these corporations [and the FCC] are clueless. I, too, am very concerned about this proposal, and not just for hams, but for the precedent that it creates. This is the equivalent of special legislation that benefits a single corporate entity. WalterH --- In Repeater-Builder@yahoogroups.com, David Jordan wa3...@... wrote: Joe, I'd put them in the Licensed Public Safety Broad Band Data allocation 4940-4980Mhz band.plenty of room there.very little usage. My guess is the manufacturer doesn't have the technology or funding needed to build the cheaply made, significantly over priced crawling camera to operate in the GHz ranges. Like BPL.this vendor will disappear once their venture capital has been all used up. The military may purchase some of these units but with tax revenues down nationally, for the next several years, I don't think your local fire or police dept will be spending many dollars on this low value technology. I'm not worried about this order. Best, dave _ From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of MCH Sent: Thursday, March 04, 2010 2:42 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Re: Fw: FCC RO Involving the Amateur 70cm Band The premise is common sense, but, as you say, this is the government. Where would *you* put TV transmitters if not in the TV bands? Joe M. David Jordan wrote: I don't think there is any premise or as you say, ...fact that it should be in the bands where TV is authorized... is relevant. Where the FCC decides to put it is where the fact.
[Repeater-Builder] Re: New to 900mhz,, PL or DPL?
Then it's not COR [Carrier Operated Relay]. It would be RUS [Receiver UnSquelch]. And running any voice station strictly on PL/DPL is a bad idea. PL [CTCSS] is prone to falsing if it isn't AND'ed with carrier detect. I have to figure that DPL is better, but random energy from the 'hiss' has got to false the decoder once in a while. BTW, my agency uses the same 2 PL tones across the state, whether high RF site or not. And the majority of 440 ham repeaters in my area use the SAME 100.0 Hz tone for access. So, unless you have some desire to restrict who can access your repeater [since some radios WON'T do DPL], then my recommendation is PL. But stay away from 179.9 Hz, as that can be falsed by the third harmonic of the mains. And choose one that's neither at the top nor bottom of the list. WalterH --- In Repeater-Builder@yahoogroups.com, kq7dx kq...@... wrote: Thank you for all the replies and great information. I have another question on code selection. Other than 411 being a code used for open repeater, what is the criteria for picking a DPL code. Also it looks like PL being preferred to DPL is not RFI specific as I have seen on frequency lists with PL being used in high RFI locatations. What do you think about leaving the squelch open and letting the DPL control the COR. Thanks again... The DPL list I found. Standard 83 Digital Coded Squelch Codes 0nn 1nn 2nn 3nn 4nn 5nn 6nn 7nn 023 114 205 306 411 503 606 703 025 115 223 311 412 506 612 712 026 116 226 315 413 516 624 723 031 125 243 331 423 532 627 731 032 131 244 343 431 546 631 732 043 132 245 345 432 565 632 734 047 134 251 351 445 654 743 051 143 261 364 464 662 754 054 152 263 365 465 664 065 155 265 371 466 071 156 271 072 162 073 165 074 172 174
[Repeater-Builder] Re: Unlawful in Il to Rebroadcast Public Safety Communications
What /I/ can add, is that the FCC has said that if you want privacy for your communications, then encrypt them. Clear voice is available to anyone with the appropriate receiver. No, I can't find my source for this, I've read all the Daily Digests for the last 5+ years, and I believe it was in a letter ruling. BTW, if you go to the url listed, you'll see that it's still in committee. Not passed by the House nor Senate, nor signed by the Governor. WalterH --- In Repeater-Builder@yahoogroups.com, Eric Lowell elowell9...@... wrote: Wow! I would have thought it illegal under Federal Law. What do I know Best Regardss, de W1EL  Eric Lowell Eastern Maine Electronics Inc. 48 Loon Road Wesley ME 04686 eme@... www.satnetmaine.com From: ka9qjg1 ka9...@... To: Repeater-Builder@yahoogroups.com Sent: Thu, February 18, 2010 9:27:44 PM Subject: [Repeater-Builder] Unlawful in Il to Rebroadcast Public Safety Communications  FYI It is now Against the Law in Il To Rebroadcast Public safety Communications including radio or Internet I know most of us in this Hobby are aware of all the Scanner Type Communications being linked d to the Internet. I always wondered about the legality of doing this especially living in one of the Few States that have an Anti Scanner Law against mobiles and Handhelds unless one is exempt. I always liked the idea of seeing something big on the News and finding a site from that area to listen to it Live . Well it looks like Il has put together a law against doing this I do not know about other states . Or how this is going to stop the On Line Scanner stations. Also as written unless I have permission it looks like I cannot rebroadcast the Amber Alerts which come out over My Emerg Weather Receive on My Repeaters I am sure others have this on the Repeters too This will be interesting to see if anyone is a actually charged with this Don KA9QJG Statutes Amended In Order of Appearance 20 ILCS 2615/11 new 20 ILCS 2615/12 new Synopsis As Introduced Amends the State Police Radio Act. Provides that a person receiving public safety voice or data communication transmitted via the facilities of the State's public safety radio system by wire or radio shall not, without the written authority of the originator of the communication, rebroadcast the communication via any means, including radio or Internet, or otherwise divulge or publish the existence, contents, substance, purport, effect, or meaning thereof. Provides that this provision does not apply to the public safety radio communication transmitted by any system station for the use of the general public, including Amber Alerts and other communications specifically intended for rebroadcast to the public. Provides that radio access to the public safety radio system within the State may only be accomplished upon receipt of written authorization granted by the appropriately licensed authority. Provides that a violation of these provisions is a Class A misdemeanor. Effective immediately. http://tinyurl. com/yf3on2y
[Repeater-Builder] Re: Trbo to be DOA 2012 Say Hello to Tetra
What have you been smoking? P25 will be in play in the public safety arena for at least another 15 years. And Tetra is having IPR issues with Motorola and banding issues with the FCC regarding use in the USA. There is NO 6.25 requirement. Only an equivalence, just as there is a 12.5 equivalence for the current narrowband Part90 mandate. So, you could run 4 talk paths in a 25 kHz channel and meet the 6.25 'requirement' which has yet to be promulgated. I am of the opinion that if you want to play with this stuff in Part 97, go for it. That's one of the stated purposes for the Amateur Service. I, for one, will continue to operate my 'wideband' fm equipment for the foreseeable future, and if/when a manufacturer makes amateur equipment with these digital modes for no more than 20% above current pricing, I'd buy it. I just don't see that for a fair number of years. Commercial digital equipment is around 50% more to have digital capabilities. WalterH KD7BJJ --- In Repeater-Builder@yahoogroups.com, j.cherry377 j.cherry...@... wrote: The plan as I have it is to merge P25 and Trbo into a Tetra Product, for release in 2012, at which time Turbo will be discontinued and abandoned as its not true 6.25kc and wont comply with the new 2.5kc standard that all will have to start adhering to. Trbo takes up 12.5kc though it provides 2 voice paths, its not 6.25kc wide. My question is when will the 440 and 2m bands start talking about making a unified 6.25 kc divisible bandplan and apply it nationwide? They will have to do it so might as well get started talking about it. I know that there are a lot of people with 25/30 kc radios that are not going to care for hearing about this. A good first step is to design the layout in 12.5 kc steps for each band and start planning on at least going to 2.5kc deviation around that time..
[Repeater-Builder] Re: Caution to Group Members Trojan from Yahoo Banner Advertisments
Yes. But they need instances of this to be reported, in particular, WHAT ad was responsible. Go here and read the posting by Gordon of Yahoo! Groups. http://suggestions.yahoo.com/detail/?prop=groupsfid=181211 WalterH --- In Repeater-Builder@yahoogroups.com, Paul Plack pl...@... wrote: Has Yahoo been made aware? - Original Message - From: skipp025 To: Repeater-Builder@yahoogroups.com Sent: Sunday, January 17, 2010 6:27 PM Subject: [Repeater-Builder] Re: Caution to Group Members Trojan from Yahoo Banner Advertisments I actually believe I received the trojan from a banner ad while setting up new book-marks for one of the radio/repeater Groups I frequent...
[Repeater-Builder] Re: Mitrek repeater conversion cos problem
Narrowband? Did you mean 'duplex'? WalterH --- In Repeater-Builder@yahoogroups.com, cruizzer77 atlant...@... wrote: SNIP In a later step I also need to narrowband the radio, therefore I'm a bit worried. SNIP 73 Martin
[Repeater-Builder] Re: Service Monitor Input Protection
Blew them out left and right when I was getting started in the business. There was a calibrated isolator that someone sold to replace the 40dB pad on the Cushman. Would handle 50 watts(?) for short periods. WalterH --- In Repeater-Builder@yahoogroups.com, Eric Lowell elowell9...@... wrote: Cushmans used low value fuses for years.  Eric Lowell Eastern Maine Electronics Inc. 48 Loon Road Wesley ME 04686 eme@... www.satnetmaine.com 207-210-7469 From: James ka2...@... To: Repeater-Builder@yahoogroups.com Sent: Tue, January 5, 2010 5:30:00 PM Subject: [Repeater-Builder] Service Monitor Input Protection  Hello to the group. Knowing most of you have service monitors for the Repeater Builder Hobby, I wanted to pose the following question. What method do you use to protect the input of your service monitor from excessive RF Power input? I am referring to the input/output jack that is limited to 2.5 watts on MANY service monitors. I know I can use an attenuator, but that gets removed for sensitivity checks and may not get put back on. One suggestion is a RF Relay that would trip on say one watt and put the power to a dummy load. The problem is I have used one of the cheap circuits in the past and toasted transistors in a Pre-amp, before the relay reacted as the book said it should. However I know there are circuits in say the Mirage Amp that also has a Pre-Amp that is removed from the antenna during transmit, that works well. What are you doing to protect your monitor? Appreciate your thoughts. 73 JIM KA2AJH
