[Repeater-Builder] wanted- macaroni fly back xfmr
hi gang. mdm here. i have a macaroni 2955 with a smoked flyback xfmr. repair shop can't find the part. someone must have a spare or a parts chassis somewhere. and help appreciaed greatly. this is a pristine monitor and i'd really like to get it fixed for my shop. thanks mdm ted thawing out in Chicago.. Ted Bleiman K9MDM MDM Radio If its in stock...we've got it! P O Box 31353 Chicago, IL 60631-0353 773.631.5130 fax 773.775.8096 web http://www.mdmradio.com email - mdmra...@yahoo.com DIRECT ALL EMAIL
Re: Pagers in 2009 - why? (was: [Repeater-Builder] A desense issue)
There are a LOT of professional people (myself included) who don't regularly carry a cell phone. I have been known to leave my cell phone in a lot of weird places. I have a lot of problems with the reliability of cell phones not being able to send a message via a dial up modem isn't alluring to me. (there are a lot of reasons computer people need to do this) I also have the option of ignoring the pager versus a cell phone. Doctors for one really do not like cell phones. It is one thing for a patient to have your cell phone number versus your pager number. --Don On 2/9/09 12:43 AM, Jacob Suter jsu...@intrastar.net wrote: Seriously... What is today's market for pagers? I can't imagine there's any real reason for them to continue to exist. If the FCC can force you to quit using your perfectly good 25 khz rig, force the multi-billion-dollar-a-year OTA TV industry onto HD, or the zillion other examples of the FCC's absolute power, why hasn't someone asked the FCC why the paging industry is continuing to camp on a pile of spectrum with insane EIRPs that regularly cause co-site and near-site crosstalk problems. Playing with my rather deaf scanner, in a rather low-population area, I hear almost no pager traffic - enough that it could easily all be placed onto a single channel or thrown onto a cellular network. Unluckily, there is just enough traffic on practically everywhere from 145 to 960 mhz that it causes problems on any high mounted site. Come on, who's for a Paging Sunset? JS -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Jed Barton Sent: Sunday, February 08, 2009 4:26 PM To: repeater-builder@yahoogroups.com Subject: [Repeater-Builder] A desense issue Hey guys, Alright, perhaps some of you have some ideas, cause this one has driven a bunch of us absolutely crazy. At one of my repeater sights, I have a 220 repeater, a 440, and a 900. Also, there is a paging transmitter about 3 feet away from all of this. Here's the issue. The paging transmitter is desensing both the 440 and the 900. The 440 repeater is a kenwood tkr850, and the 900 is an msf5000. I'm running a set of 4 cavity wacom cans on UHF, same for 900. The paging transmitter is transmitting on 152.6. We've watched it, and there is no doubt that the paging transmitter is the problem. The transmitter is a Glen Air. We can shoot a weak signal in to the UHF repeateror the 900 with the service monitor. That weak signal will get very strong as soon as the paging transmitter unkeys. We even went to the extreme of getting a filter from par electronics to knotch out the 152.6, but na, didn't work. As if this isn't bad enough, the antennas for the 900 and the 440 are only about 25 feet apart horizontally, it's as far apart as they can go. Any thoughts guys, anyone ever run in to this situation? Thanks, Jed Yahoo! Groups Links Yahoo! Groups Links
Re: [Repeater-Builder] Check Your Traps...
At 05:35 PM 02/08/09, you wrote: Ken Arck wrote: At 08:36 AM 2/8/2009, Lee Pennington wrote: One Acorn Too Many and other amatuer related videos! ---Man... I thought this was about voter fraud! Ken -- h...don't get the reference A quick google search resulted in these... http://pajamasmedia.com/blog/the-complete-guide-to-acorn-voter-fraud/ http://www.publicintegrity.org/blog/entry/885/ http://www.rottenacorn.com/activityMap.html http://www.foxnews.com/story/0,2933,435744,00.html http://gatewaypundit.blogspot.com/2009/01/acorn-worker-charged-with-nursing-home.html Mike
RE: [Repeater-Builder] Transistor needed
You can also contact Chip Angle at Angle linear and see if he will work his magic on it. In the past he as rebuilt Micor and GE preamps. Mike At 08:32 PM 02/08/09, you wrote: I looked at the parts list for the UHS preamplifier in LBI-4561C, and saw: Q2301 N-channel FET, similar to 3N187. You can buy this very common transistor from Mouser or Digi-Key. You can also purchase the exact GE part 19A116818P1 from New London Technology, for $2 each. www.newlondontechnology.com/ 73, Eric Lemmon WB6FLY -Original Message- From: mailto:Repeater-Builder%40yahoogroups.comRepeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of WA Brown Sent: Sunday, February 08, 2009 7:53 PM To: mailto:Repeater-Builder%40yahoogroups.comRepeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Transistor needed I have a ULS preamp that has a bad transistor. The bad transistor on the UHS preamp board is a GE Mobile Part Number 19A116818P1 device (marked 6818P1). Would anyone have one that we could get? WA Brown
Re: Pagers in 2009 - why? (was: [Repeater-Builder] A desense issue)
On Feb 9, 2009, at 12:43 AM, Jacob Suter wrote: Seriously... What is today's market for pagers? I can't imagine there's any real reason for them to continue to exist. There are a number of excellent uses of pagers, including penetration of structures that are RF dense (where cell phones don't work), or signaling people in areas where cell phones are not allowed for security or other reasons. In addition, there's a pretty good number of remote control devices that listen to a particular paging system and a single CAP code (or whatever those are called these days) and numbers correspond to a particular unit doing something, like switching power on/off to reboot a system, etc. Additionally so-called two-way pagers are used to monitor systems, check stock in vending machines/signal the owners to come refill them, empty the coin boxes, whatever. Paging has cost benefits over cellular text in these applications, with cellular carriers being greedy enough to think a single text message should cost $0.50 each, and multiple receivers can't be used on that network for a single paging bill... Nate WY0X
RE: [Repeater-Builder] Re: Hamtronics Helical Resonator Preamp or Advanced Research Preamp
And that works how in FM ???(last I heard the noise is AM, speech is FM ) At 08:52 PM 02/05/09, you wrote: What he is saying is , a lower gain preamp aplifies less noise in relation to the signal so the audio sounds better -- To: Repeater-Builder@yahoogroups.com From: lar...@hotmail.com Date: Fri, 6 Feb 2009 04:47:11 + Subject: [Repeater-Builder] Re: Hamtronics Helical Resonator Preamp or Advanced Research Preamp --- In mailto:Repeater-Builder@yahoogroups.comRepeater-Builder@yahoogroups.com, Joe Burkleo joeburk...@... wrote: If for example the site has a higher than normal noise floor a lower gain preamp will often times amplify more of the signal and less of the extra site noise, where a higher gain preamp may amplify both the noise and signal, giving you a signal with more noise than you would like. Joe, scratchin' my head here... Would you be able to clarify the above statement for me? Laryn K8TVZ -- Get what you want at ebay. http://a.ninemsn.com.au/b.aspx?URL=http%3A%2F%2Frover%2Eebay%2Ecom%2Frover%2F1%2F705%2D10129%2D5668%2D323%2F4%3Fid%3D10_t=763807330_r=hotmailTAGLINES_m=EXTGet rid of those unwanted christmas presents!
Re: [Repeater-Builder] Johnson vhf crystal repeater part number
Please dispose of it in my direction then. I can use it. Mike WA6ILQ At 08:19 AM 02/06/09, you wrote: Oh, ok. I will dispose of it then. I have no use for it. - Original Message - From: mailto:Repeater-Builder%40yahoogroups.comRepeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.comRepeater-Builder@yahoogroups.com To: mailto:Repeater-Builder%40yahoogroups.comRepeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.comRepeater-Builder@yahoogroups.com Sent: Fri Feb 06 10:07:09 2009 Subject: Re: [Repeater-Builder] Johnson vhf crystal repeater part number NORM KNAPP wrote: Hi, I got a preselector from a vhf johnson repeater. It has 9 slugs in it and 4 RCA jacks on it. It appears to have a built in preamp also. Is that what it is? Does it have a built in preamp or is that a mixer? Part number is TLE8023APR. Thanks! 73 de N5NPO Norm Oh-and it's UHF, not VHF.
[Repeater-Builder] Anybody have an RLC3 for sale ?
From a local small group... Mike - Please post a request for anybody that has an RLC3 for sale... We need one, and maybe two. Prefer with more than three radio cards. And please ask if someone has a spare radio card that we can add to the RLC3 we already have... Reply to me, I will forward. Thanks... Mike WA6ILQ
Re: Pagers in 2009 - why? (was: [Repeater-Builder] A desense issue)
Fire service relies on paging heavily. Although it can be sent via cell phone, it is extremely unreliable, at least in our area. Sometimes pages get held in que for hours or even days. Chuck WB2EDV - Original Message - From: Jacob Suter jsu...@intrastar.net To: Repeater-Builder@yahoogroups.com Sent: Monday, February 09, 2009 2:43 AM Subject: Pagers in 2009 - why? (was: [Repeater-Builder] A desense issue) Seriously... What is today's market for pagers? I can't imagine there's any real reason for them to continue to exist.
Re: [Repeater-Builder] OT Power Factor
Depends. Some customers are metered for reactive demand. It would matter then. Chuck WB2EDV - Original Message - From: Thomas Oliver To: repeater-builder@yahoogroups.com Sent: Monday, February 09, 2009 2:43 AM Subject: [Repeater-Builder] OT Power Factor Question for any electrical engineers out there. Are the meters on the side of buildings metering real power or apparent power? Is power factor correction worth doing if the power company is not dinging the customer for low power factor? This article http://powerelectronics.com/power_management/motor_power_management/705PET23.pdf talks about residential power factor correction and my conclusion (from this article) is the savings would never be recouped. Second conclusion is the only benefit with correction is the wires between the source and load don't heat up as much. What about the wires in the motor or transformer? do they also heat less? I would think so. Third conclusion is by correcting power factor you are helping the utility company more than yourself because these phase differences standing waves exist all the way back to the power generation source therefore the utility lines have more loss due to their greater length than the customers building wiring has. The reason I am researching this is a customer of mine has roughly 50 hp of total motors in his shop and wanted to know if he could save 30% on his electric bill like some salesman of power factor correction black boxes told him he could. I realize I am going to have to look at his energy bill to see if there is a charge for low power factor and maybe call the utility company to see if he will get a lower rate if he adds PFC devices tom (\__/) ... (='.'=) ()_()
[Repeater-Builder] Old RACES Rules
The Communications Division of the Orange County (California) Sheriff's Department is celebrating its 75th anniversary next month, and one of our displays at the event is a chronology of RACES history (including old repeaters that we used). If anyone has a set of old FCC RACES rules from 1952 (when RACES was created) until now, I would appreciate it if you could e-mail me a copy. Thanks, Ken Bourne, W6HK Chief Radio Officer County of Orange (California) RACES Orange County Sheriff's Department Communications Division e-mail: w...@ocraces.org
[Repeater-Builder] Re: Vertex VXR 5000
Thx for the info! --- In Repeater-Builder@yahoogroups.com, DCFluX dcf...@... wrote: I did post a schematic that is compatable with the VXR-7000 on the repeater builder site. On Thu, Feb 5, 2009 at 12:10 PM, Joe joeariz...@... wrote: Does anyone know where I can find a VPl-1 programming cable? Seen some on Ebay but they are listed as not working with the VXR-7000, are the pinouts differant from the mobile ham radios to the repeater the VPL-1 is supposed to work with? Purchased a UHF repeater to run on Echolink, planning on the Tigertronics Signalink USB interface. Has anyone used the Signalink with success? Can I run IRLP off the same Signalink or is a seperate interface required? Thx, Joe Yahoo! Groups Links
[Repeater-Builder] Re: Pagers in 2009 - why?
Jacob, Yes their is still is a use for pagers. For the general public type in my area are used by the medical people. (Doctors and other important hospital people). Also the other group that uses pagers are the Fire Fighters. This paging system is on the fire dispatch channel were each dept has their own tones to activate their pagers. I think the paging system took a big hit when cell phones came out. But right now I think it is stable and is being used by a certain group of people. Like I said in my area most of it is used in the medical field. Some business use them as well. Business like a local large HVAC co. uses them. Well hope that helps Paul Jacob Suter wrote: Seriously... What is today's market for pagers? I can't imagine there's any real reason for them to continue to exist. If the FCC can force you to quit using your perfectly good 25 khz rig, force the multi-billion-dollar-a-year OTA TV industry onto HD, or the zillion other examples of the FCC's absolute power, why hasn't someone asked the FCC why the paging industry is continuing to camp on a pile of spectrum with insane EIRPs that regularly cause co-site and near-site crosstalk problems. Playing with my rather deaf scanner, in a rather low-population area, I hear almost no pager traffic - enough that it could easily all be placed onto a single channel or thrown onto a cellular network. Unluckily, there is just enough traffic on practically everywhere from 145 to 960 mhz that it causes problems on any high mounted site. Come on, who's for a Paging Sunset? JS - .
[Repeater-Builder] Re: Pagers in 2009 - why?
Hospitals and other locations sometimes ban any device that transmits RF. The pager meets these requirements. The pager industry has been dying a slow death for many years now, but the bleeding has seemed to taper off a bit. Purchasing a pager for your employee is less expensive than a cell phone, and the costs can be controlled. No minute usage or overages, cheap to replace if lost or stolen, etc. Prepaid phones have come way down in price lately, so these may eventually replace the cheaper pagers. One of the problems with paging transmitters is that bandpass filters are being removed from the transmitters. When I worked in the paging industry we had up to 11 transmitters transmitting on 11 different frequencies at some sites. As the customer base declined transmitters were removed and the remaining transmitters on the same band were made multi-frequency. When this happened, the bandpass filter for the single frequency had to be removed so as to allow up to 4 different frequencies to be used in the transmitter. Without the bandpass filter you get broadband site noise. Some site leases require bandpass filters on transmitters, especially paging transmitters. If you have access to lease agreements you might check to see if they are compliant. Paging transmitters can produce up to 250 to 500 watts from the transmitter. Add that to a 10dB antenna and you get lots of ERP. Their license usually restricts the ERP, but that is no guarantee that the site is being operated legally. As paging sites are lost due to high rents it is very tempting for the paging company to turn up the power at the remaining sites to improve coverage. Verifying ERP is very difficult to do, as you would have to do invasive testing. 73, Joe, K1ike
[Repeater-Builder] Re: Pagers in 2009 - why?
I help to maintain a VHF public safety paging system. It is completely stand-alone with no dependency on telephone circuits or power. (Critical sites are on generator, sites are linked via RF). During a major disaster we can stay on the air and dispatching without depending on the infrastructure. During a major disaster such as a hurricane or ice storm, most of the cellular networks will be of the air in short time due to their use of phone lines or fiber cable for T1 circuits to the sites. Think Katrina... 73, Joe, K1ike Chuck Kelsey wrote: Fire service relies on paging heavily. Although it can be sent via cell phone, it is extremely unreliable, at least in our area. Sometimes pages get held in que for hours or even days. Chuck WB2EDV
Re: Pagers in 2009 - why? (was: [Repeater-Builder] A desense issue)
- Original Message - From: Jacob Suter jsu...@intrastar.net Seriously... Come on, who's for a Paging Sunset? Not hospitals... we have a mix of both in-house (local) and alpha-numeric (tied in to a network that hits all 4 states of the corner we live and work in). They're quick and cheap. Even though the maintenance guys are running around with CP-200s listening to a repeater (trying to have a toehold on-topic), we can send a text message to a pager with detailed information (go to Room 497 and fix the nurse call) automatically from the work-entry system. Keeper of the repeater and pager systems, Ray, KB0STN
Re: [Repeater-Builder] Check Your Traps...
Oh, yeah, I remember them now... And yeah, what a surprise that it's come to halt...:c/ /soapbox Richard wrote: Acorn was in the news late last year for voter fraud, mostly for fraudulent voter registrations. I didn't follow it too closely because it pissed me off so much. They were being investigated but, now that obama is in office, that appears to have been stopped, and the liberals are going to reward them with hundreds of millions of dollars instead. In other words, your typical democratic congress at work. Richard http://www.n7tgb.net/ www.n7tgb.net _ From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of wd8chl Sent: Sunday, February 08, 2009 5:35 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Check Your Traps... Ken Arck wrote: At 08:36 AM 2/8/2009, Lee Pennington wrote: One Acorn Too Many and other amatuer related videos! ---Man... I thought this was about voter fraud! Ken -- h...don't get the reference
RE: [Repeater-Builder] Check Your Traps...
apology I fired off this reply without paying attention to the group it was going to. Had I paid attention, I would have toned down the politics a little. My apologies, I wasn't trying to anger anyone. /apology Yes, it was a surprise. Richard http://www.n7tgb.net/ www.n7tgb.net _ From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of wd8chl Sent: Monday, February 09, 2009 6:33 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Check Your Traps... Oh, yeah, I remember them now... And yeah, what a surprise that it's come to halt...:c/ /soapbox Richard wrote: Acorn was in the news late last year for voter fraud, mostly for fraudulent voter registrations. I didn't follow it too closely because it pissed me off so much. They were being investigated but, now that obama is in office, that appears to have been stopped, and the liberals are going to reward them with hundreds of millions of dollars instead. In other words, your typical democratic congress at work. Richard http://www.n7tgb. http://www.n7tgb.net/ net/ www.n7tgb.net _ From: Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com [mailto:Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com] On Behalf Of wd8chl Sent: Sunday, February 08, 2009 5:35 PM To: Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com Subject: Re: [Repeater-Builder] Check Your Traps... Ken Arck wrote: At 08:36 AM 2/8/2009, Lee Pennington wrote: One Acorn Too Many and other amatuer related videos! ---Man... I thought this was about voter fraud! Ken -- h...don't get the reference
RE: Pagers in 2009 - why? (was: [Repeater-Builder] A desense issue)
Jacob, here's just one example. I work for an agency within state government. Rather than me provide them with my private cell phone number, they prefer to issue me a numeric pager - in case they need to make contact with me. To date, they have only used the pager ONCE in nearly 6 years. I have even offered to forego the pager in favor of my cell phone, but they said I HAVE* to keep it. I know, it costs quite a chunk of money to maintain this, but again - we're talking about state government :-( Mark - N9WYS -Original Message- From: Repeater-Builder@yahoogroups.com On Behalf Of Jacob Suter Seriously... What is today's market for pagers? I can't imagine there's any real reason for them to continue to exist. If the FCC can force you to quit using your perfectly good 25 khz rig, force the multi-billion-dollar-a-year OTA TV industry onto HD, or the zillion other examples of the FCC's absolute power, why hasn't someone asked the FCC why the paging industry is continuing to camp on a pile of spectrum with insane EIRPs that regularly cause co-site and near-site crosstalk problems. Playing with my rather deaf scanner, in a rather low-population area, I hear almost no pager traffic - enough that it could easily all be placed onto a single channel or thrown onto a cellular network. Unluckily, there is just enough traffic on practically everywhere from 145 to 960 mhz that it causes problems on any high mounted site. Come on, who's for a Paging Sunset? JS
[Repeater-Builder] Re: Pagers in 2009 - why?
Nicely said Nate! Other benefits include MUCH longer battery life (how long does your cell phone last? 4 hours? 6? A pager that doesn't last at least a month on 1 AA cell has a problem!) The lack of a transmit function is necessary in many environments, like hospitals, as well as many hazardous atmospheres/environments. As others alluded to, throughput on a paging network is much better too. We strive for a throughput under 60 seconds. A text msg is just about the lowest priority for cellular, and times are usually much longer. There are some new products out too. You know the little 'coaster pagers' you get in restaurants? How about having one in a hospital waiting room so you can be reached even if you leave the room? With one of those on the network, you can not only leave the waiting room, you can go down the street and get something to eat, or pick up a few items for the patient, etc. We also have a device that can hang on the wall or sit on a desk, with a wall supply and a D cell, for schools, fire depts, utilities, and so on, for mass alerts. To answer the other side of it, the more modern transmitters are very clean. We've had excellent luck with the Glenayre transmitters, both the 7900 series and the 8500/8600's. Yes, the older VHF PURC's and Quintron's (with tube PA's) were pretty dirty, and needed to be 'baby-sat' a lot, so a narrow band-pass cavity and circulator/isolator was a must (and before you ask, the Glenayre's all come with a circulator standard). But at least here in Cleveland/NE Ohio, that stuff is basically gone. I think the only VHF paging left is the medical 152.0075, and that's fading fast. There is still a fair amount of VHF and UHF in WV and PA, where the terrain makes 900 MHz rough. Jim Barbour Field Engineering American Messaging (trying not to sound like a salesman, er, person ;cP) Nate Duehr wrote: On Feb 9, 2009, at 12:43 AM, Jacob Suter wrote: Seriously... What is today's market for pagers? I can't imagine there's any real reason for them to continue to exist. There are a number of excellent uses of pagers, including penetration of structures that are RF dense (where cell phones don't work), or signaling people in areas where cell phones are not allowed for security or other reasons. In addition, there's a pretty good number of remote control devices that listen to a particular paging system and a single CAP code (or whatever those are called these days) and numbers correspond to a particular unit doing something, like switching power on/off to reboot a system, etc. Additionally so-called two-way pagers are used to monitor systems, check stock in vending machines/signal the owners to come refill them, empty the coin boxes, whatever. Paging has cost benefits over cellular text in these applications, with cellular carriers being greedy enough to think a single text message should cost $0.50 each, and multiple receivers can't be used on that network for a single paging bill... Nate WY0X
[Repeater-Builder] Looking for UHF Radios for Repeater....
OK so I have posted a few times about building a repeater. Well I think I am ready now to take the plung and start working on building a UHF repeater. So for a starting point I want to build a UHF (70cm) repeater. To start I am looking for a good radio that can be converted. What do you recommend that can be easily modified???
RE: [Repeater-Builder] ACC RC96 rx audio gating
Has anyone ever figured out why the RC96 does NOT mute RX audio when the receiver is inactive? Looking at the schematic it appears that the rx audio mux switch pin of IC9 (4053) should, in theory (according to the schematic), control the audio gating. The switch control pin is tied to the select 1 line, which is driven by the cpu (indirectly). If I remember right, both the RC85 and RC96 behave this way. As you said, it is likely that they never implemented the control in software. The RC85/96, unlike many other controllers, let hardware logic do a lot of the grunt work to un-burden the processor, as is evidenced by the way it does audio gating. I did a modification at the delay board, possibily similar to what you did but I don't remember exactly, to properly mute when feeding it unsquelched audio. --- Jeff WN3A
Re: [Repeater-Builder] Looking for UHF Radios for Repeater....
A GE Mastr II is easily modified. The modification instructions are readily available on this list's supporting website: http://www.repeater-builder.com/rbtip/geindex.html I have 45 UHF GE Mastr II radios that are perfect for conversion to repeater duty. If you are looking for a conversion kit, we can help you out there as well. We can provide all the switches, wire, etc. that you would need for a successful conversion. This would save gathering these parts and pieces yourself. If you are interested further, please contact me off-list. Good luck with your 1st machine!! Scott - Repeater-Builder (The company) Scott Zimmerman Amateur Radio Call N3XCC 474 Barnett Rd Boswell, PA 15531 - Original Message - From: lou_c1357 lou_c1...@yahoo.com To: Repeater-Builder@yahoogroups.com Sent: Monday, February 09, 2009 11:11 AM Subject: [Repeater-Builder] Looking for UHF Radios for Repeater OK so I have posted a few times about building a repeater. Well I think I am ready now to take the plung and start working on building a UHF repeater. So for a starting point I want to build a UHF (70cm) repeater. To start I am looking for a good radio that can be converted. What do you recommend that can be easily modified??? Yahoo! Groups Links No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.0.233 / Virus Database: 270.10.19/1941 - Release Date: 02/08/09 17:57:00
[Repeater-Builder] Re: Pagers in 2009 - why?
That's odd. We gave up commercial paging for the exact same reason. Joe M. Chuck Kelsey wrote: Fire service relies on paging heavily. Although it can be sent via cell phone, it is extremely unreliable, at least in our area. Sometimes pages get held in que for hours or even days. Chuck WB2EDV - Original Message - From: Jacob Suter jsu...@intrastar.net To: Repeater-Builder@yahoogroups.com Sent: Monday, February 09, 2009 2:43 AM Subject: Pagers in 2009 - why? (was: [Repeater-Builder] A desense issue) Seriously... What is today's market for pagers? I can't imagine there's any real reason for them to continue to exist. Yahoo! Groups Links
Re: [Repeater-Builder] Re: Pagers in 2009 - why?
The other big thing with emergency services - they want the ability to be able to monitor traffic on the channel. Chuck - Original Message - From: MCH m...@nb.net To: Repeater-Builder@yahoogroups.com Sent: Monday, February 09, 2009 11:30 AM Subject: [Repeater-Builder] Re: Pagers in 2009 - why? That's odd. We gave up commercial paging for the exact same reason. Joe M. Chuck Kelsey wrote: Fire service relies on paging heavily. Although it can be sent via cell phone, it is extremely unreliable, at least in our area. Sometimes pages get held in que for hours or even days. Chuck WB2EDV
Re: [Repeater-Builder] OT Power Factor
Very interesting subject. People don't seem to be concerned about what kind of energy they are receiving from electric power company suppliers. I've asked previously for information about what people get in their homes and repeater sites with only one response telling me taps are available to solve a high or low problem. Do phase shift capacitors have an effect on our home our test equipment, repeaters? The AC specs here are 115.2 - 124.8. A calibrated NBS Fluke 77 reads consistently on the high end, and frequently up as high as 128. The power company engineer says they can do nothing about it, that taps do not exist anywhere in the system to lower the line voltage. Only phase shift capacitors. Our older test equipment designed around a 115 volt line plus AC motors, power transformers can have a problem with saturation. On a room to room/ garage/ shop investigation how many transformers, motors are in your dweling? Those big honker 30 amp or higher power supplies on repeaters going up in smoke. What's in your walletI mean your electric service line? GaryK2UQ In a message dated 2/9/2009 7:30:24 A.M. Eastern Standard Time, wb2...@roadrunner.com writes: Depends. Some customers are metered for reactive demand. It would matter then. Chuck WB2EDV - Original Message - From: _Thomas Oliver_ (mailto:tsoli...@tir.com) To: _repeater-buil...@repeater-buirep_ (mailto:repeater-builder@yahoogroups.com) Sent: Monday, February 09, 2009 2:43 AM Subject: [Repeater-Builder] OT Power Factor Question for any electrical engineers out there. Are the meters on the side of buildings metering real power or apparent power? Is power factor correction worth doing if the power company is not dinging the customer for low power factor? This article _http://powerelectrohttp://pohttp://powerelechttp://powerehttp://powehttp://pohtt_ (http://powerelectronics.com/power_management/motor_power_management/705PET23.pdf) talks about residential power factor correction and my conclusion (from this article) is the savings would never be recouped. Second conclusion is the only benefit with correction is the wires between the source and load don't heat up as much. What about the wires in the motor or transformer? do they also heat less? I would think so. Third conclusion is by correcting power factor you are helping the utility company more than yourself because these phase differences standing waves exist all the way back to the power generation source therefore the utility lines have more loss due to their greater length than the customers building wiring has. The reason I am researching this is a customer of mine has roughly 50 hp of total motors in his shop and wanted to know if he could save 30% on his electric bill like some salesman of power factor correction black boxes told him he could. I realize I am going to have to look at his energy bill to see if there is a charge for low power factor and maybe call the utility company to see if he will get a lower rate if he adds PFC devices tom (\__/) ... (='.'=) ()_() **Who's never won? Biggest Grammy Award surprises of all time on AOL Music. (http://music.aol.com/grammys/pictures/never-won-a-grammy?ncid=emlcntusmusi0003)
Re: [Repeater-Builder] OT Power Factor
114 to 126 is typically the standard in the USA. Many transformers have taps internally to adjust for this, but some utilities order them without taps to save a few bucks. Chuck - Original Message - From: albemar...@aol.com To: Repeater-Builder@yahoogroups.com Sent: Monday, February 09, 2009 11:39 AM Subject: Re: [Repeater-Builder] OT Power Factor Very interesting subject. People don't seem to be concerned about what kind of energy they are receiving from electric power company suppliers. I've asked previously for information about what people get in their homes and repeater sites with only one response telling me taps are available to solve a high or low problem. Do phase shift capacitors have an effect on our home our test equipment, repeaters? The AC specs here are 115.2 - 124.8. A calibrated NBS Fluke 77 reads consistently on the high end, and frequently up as high as 128. The power company engineer says they can do nothing about it, that taps do not exist anywhere in the system to lower the line voltage. Only phase shift capacitors. Our older test equipment designed around a 115 volt line plus AC motors, power transformers can have a problem with saturation. On a room to room/ garage/ shop investigation how many transformers, motors are in your dweling? Those big honker 30 amp or higher power supplies on repeaters going up in smoke. What's in your walletI mean your electric service line? GaryK2UQ
[Repeater-Builder] Re: ACC RC96 rx audio gating
I did a little further digging with the RC96, and discovered the following... The SELECT 1 line which controls the CD4053 (U9)RX audio gate control pin behaves as follows: When the controller is in carrier access modes (COP07, 08, or 09), the pin never changes state with or without a COS and/or PL signal present. It is always low, allowing audio to pass. When the controller is in PL access mode (COP10), the SELECT 1 line becomes high when no signal is present, thus blocking rx audio from passing. When only an active COS signal is presented, it remains high. When only an active PL signal is applied, it still remains high, and no audio passes. However, when both COS and PL active signals are applied, the SELECT 1 line becomes low, and audio is allowed to pass. The line remains low even when COS then dissappears, and stays low until the PL signal ceases. Basicly, both COS and PL are needed to open the audio gate, but only PL is needed to keep it open. Fortunately, there is an easy fix. I simply bent up pin 9 of the 4053 IC (U9) so that the pin is removed from the socket. Conveniently, there is also a board solder/feedthru connection for pin 9 (SELECT 1) just to the right of the IC socket. I simply soldered in a 1N4 series diode, anode connecting to the aforementioned thru-board hole tied to pin 9, and the cathode to pin 9 of the 4053 IC itself. Next, I installed the cathode of a second diode to pin 9 as well. The anode of this second diode connects to the COS signal coming out of the ULN2804 input buffer IC (U5) at pin 18 (this is also the same signal appearing on pin 3 of the optional ADM connector location). The two diodes are simply used to fully isolate the SELECT 1 and COS signals from each other. Now, when the controller is in any of the three COS modes, the SELECT 1 signal has no effect, but the newly connected COS signal switches the 4053 audio gate to track with COS. When the controller is in PL mode, the SELECT 1 signal controls the audio gate so that audio only passes when both COS and PL are present. Since this mode is already working properly via the SELECT 1 signal to track COS (along with PL), the newly installed COS signal is simply paralled with the original SELECT 1 signal, and effectively has no bearing on the control at that point. Now, the controller will effectively mute rx audio properly no matter which receiver mode is selected (COS or PL). I successfully tested the RC96 on a Micor receiver feeding approx. 1Vpp into the controller with absolutely no blowby whatsoever. Full muting. This mod will work on the RC85 as well. With the simple installation of two $0.05 didoes, the ACC controllers will now accept unmuted rx audio without a problem. Eric KE2D --- In Repeater-Builder@yahoogroups.com, Jeff DePolo j...@... wrote: Has anyone ever figured out why the RC96 does NOT mute RX audio when the receiver is inactive? Looking at the schematic it appears that the rx audio mux switch pin of IC9 (4053) should, in theory (according to the schematic), control the audio gating. The switch control pin is tied to the select 1 line, which is driven by the cpu (indirectly). If I remember right, both the RC85 and RC96 behave this way. As you said, it is likely that they never implemented the control in software. The RC85/96, unlike many other controllers, let hardware logic do a lot of the grunt work to un-burden the processor, as is evidenced by the way it does audio gating. I did a modification at the delay board, possibily similar to what you did but I don't remember exactly, to properly mute when feeding it unsquelched audio. --- Jeff WN3A
Re: Pagers in 2009 - why? (was: [Repeater-Builder] A desense issue)
I'm currently involved in proposing a new paging system to a local hospital. They feel they have the need for voice paging (old 2 tone stuff). In addition, this system will page on event when a door is opened, a system malfunctions, a nurse pushes a panic button, etc. Having your own in-house paging system appeals very much to these folks... as it does also to manufacturing and fire departments. Sam Nelson
RE: [Repeater-Builder] Looking for UHF Radios for Repeater....
Scott, Shoot me an email I am interested and have some questions for you. Commconinc @gmail.com Thanks, Peter Summerhawk -Original Message- From: Scott Zimmerman n3...@repeater-builder.com Sent: Monday, February 09, 2009 8:26 To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Looking for UHF Radios for Repeater A GE Mastr II is easily modified. The modification instructions are readily available on this list's supporting website: http://www.repeater-builder.com/rbtip/geindex.html I have 45 UHF GE Mastr II radios that are perfect for conversion to repeater duty. If you are looking for a conversion kit, we can help you out there as well. We can provide all the switches, wire, etc. that you would need for a successful conversion. This would save gathering these parts and pieces yourself. If you are interested further, please contact me off-list. Good luck with your 1st machine!! Scott - Repeater-Builder (The company) Scott Zimmerman Amateur Radio Call N3XCC 474 Barnett Rd Boswell, PA 15531 - Original Message - From: lou_c1357 lou_c1...@yahoo.com To: Repeater-Builder@yahoogroups.com Sent: Monday, February 09, 2009 11:11 AM Subject: [Repeater-Builder] Looking for UHF Radios for Repeater OK so I have posted a few times about building a repeater. Well I think I am ready now to take the plung and start working on building a UHF repeater. So for a starting point I want to build a UHF (70cm) repeater. To start I am looking for a good radio that can be converted. What do you [The entire original message is not included]
Re: [Repeater-Builder] Re: ACC RC96 rx audio gating
Eric, Please consider taking a few high quality pictures and submit this (as an article) to RB for publishing. Kevin Custer I did a little further digging with the RC96, and discovered the following... The SELECT 1 line which controls the CD4053 (U9)RX audio gate control pin behaves as follows: When the controller is in carrier access modes (COP07, 08, or 09), the pin never changes state with or without a COS and/or PL signal present. It is always low, allowing audio to pass. When the controller is in PL access mode (COP10), the SELECT 1 line becomes high when no signal is present, thus blocking rx audio from passing. When only an active COS signal is presented, it remains high. When only an active PL signal is applied, it still remains high, and no audio passes. However, when both COS and PL active signals are applied, the SELECT 1 line becomes low, and audio is allowed to pass. The line remains low even when COS then dissappears, and stays low until the PL signal ceases. Basicly, both COS and PL are needed to open the audio gate, but only PL is needed to keep it open. Fortunately, there is an easy fix. I simply bent up pin 9 of the 4053 IC (U9) so that the pin is removed from the socket. Conveniently, there is also a board solder/feedthru connection for pin 9 (SELECT 1) just to the right of the IC socket. I simply soldered in a 1N4 series diode, anode connecting to the aforementioned thru-board hole tied to pin 9, and the cathode to pin 9 of the 4053 IC itself. Next, I installed the cathode of a second diode to pin 9 as well. The anode of this second diode connects to the COS signal coming out of the ULN2804 input buffer IC (U5) at pin 18 (this is also the same signal appearing on pin 3 of the optional ADM connector location). The two diodes are simply used to fully isolate the SELECT 1 and COS signals from each other. Now, when the controller is in any of the three COS modes, the SELECT 1 signal has no effect, but the newly connected COS signal switches the 4053 audio gate to track with COS. When the controller is in PL mode, the SELECT 1 signal controls the audio gate so that audio only passes when both COS and PL are present. Since this mode is already working properly via the SELECT 1 signal to track COS (along with PL), the newly installed COS signal is simply paralled with the original SELECT 1 signal, and effectively has no bearing on the control at that point. Now, the controller will effectively mute rx audio properly no matter which receiver mode is selected (COS or PL). I successfully tested the RC96 on a Micor receiver feeding approx. 1Vpp into the controller with absolutely no blowby whatsoever. Full muting. This mod will work on the RC85 as well. With the simple installation of two $0.05 didoes, the ACC controllers will now accept unmuted rx audio without a problem. Eric KE2D
[Repeater-Builder] Micor UHF 225W repeaters
I have become aware that there will be several of the large Micor UHF 450-470 split high power uprights available very soon. Most are complete, several are working, just removed from service last fall. Others have been cannibalized a little, mostly PA's. Rx Exciters should all be ok, but no guarantees on anything. However, we should be able to fire up one and verify basics when you show up. There is either 6 or 8 stations altogether. These are the ones with the...4CX400?...ceramic tube final. These can either be sold as a complete station, or parted out. Due to size/weight, these are pick-up ONLY in Cleveland. I think they are looking to get about $400 each for a working station, less for incomplete. Email direct, and I'll start a list to see what interest there is. Jim WD8CHL
Re: [Repeater-Builder] Re: M1225 programming problem
Hi James Your link to me to a batwings discussion on jedi mics. Do you have another? I checked the cable diagram (http://batlabs.com/images/maxpin.gif) again and see that what looks like a jumper between pins 11 and 4 may actually be a 1.7V power source. I've just used a jumper in the past and had no problems programming my P1225s. Can I connect 1.5V DC wall blob to these pins without frying anything? --jeff At 04:23 PM 2/7/2009, crackedofn0de wrote: --- In mailto:Repeater-Builder%40yahoogroups.comRepeater-Builder@yahoogroups.com, Jeff Clark je...@... wrote: Hope this is the correct group for this kind of question. I'm trying to program two m1225 UHF mobiles with a Polaris PA-II rib and a cable assembled per the batlabs cable page (listed same as GM300). I've checked and double checked the connections on both ends and made sure the tab on the rj45 end is oriented according to the diagram, but when I plug it in to the mic jack and turn on the rib, the radio keys up and stays keyed until I kill the power or pull the plug. I've tried this on both radios with the same result, and I've programmed my P1225s with the same rib, so I'm wondering if the pinout on the rj45 jack is wrong. Are there additional pinouts beside the one listed on the batlabs page? thanks, --jeff, kf6bkg The diagram on batlabs is a little screwy. I started a big ugly thread on this years ago: http://batboard.batlabs.com/viewtopic.php?t=5955http://batboard.batlabs.com/viewtopic.php?t=5955 James K7ICU
RE: [Repeater-Builder] OT Power Factor
Your typical home meter measures only real power consumed. There is no such thing as reactive power being delivered to you. Any reactive power that you may be concerned with will originate on your side of the meter at the load. You really don't care about it there either as long as the extra current does not cause excess resistive loss in your wires going to the meter. You could hang a large capacitor across one of your outlets and draw say 20 amps of current and the power meter would barely move. The only power that would be consumed would be from any resistive drop in the wire between your capacitor and the meter and any losses in the capacitor. The power company usually cares about large amounts of reactive power as it shows up to them as additional line loss. 73 Gary K4 FMX _ From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of albemar...@aol.com Sent: Monday, February 09, 2009 11:39 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] OT Power Factor Very interesting subject. People don't seem to be concerned about what kind of energy they are receiving from electric power company suppliers. I've asked previously for information about what people get in their homes and repeater sites with only one response telling me taps are available to solve a high or low problem. Do phase shift capacitors have an effect on our home our test equipment, repeaters? The AC specs here are 115.2 - 124.8. A calibrated NBS Fluke 77 reads consistently on the high end, and frequently up as high as 128. The power company engineer says they can do nothing about it, that taps do not exist anywhere in the system to lower the line voltage. Only phase shift capacitors. Our older test equipment designed around a 115 volt line plus AC motors, power transformers can have a problem with saturation. On a room to room/ garage/ shop investigation how many transformers, motors are in your dweling? Those big honker 30 amp or higher power supplies on repeaters going up in smoke. What's in your walletI mean your electric service line? GaryK2UQ In a message dated 2/9/2009 7:30:24 A.M. Eastern Standard Time, wb2...@roadrunner.com writes: Depends. Some customers are metered for reactive demand. It would matter then. Chuck WB2EDV - Original Message - From: Thomas Oliver mailto:tsoli...@tir.com To: repeater-builder@ mailto:repeater-builder@yahoogroups.com yahoogroups.com Sent: Monday, February 09, 2009 2:43 AM Subject: [Repeater-Builder] OT Power Factor Question for any electrical engineers out there. Are the meters on the side of buildings metering real power or apparent power? Is power factor correction worth doing if the power company is not dinging the customer for low power factor? This article http://powerelectro http://powerelectronics.com/power_management/motor_power_management/705PET2 3.pdf nics.com/power_management/motor_power_management/705PET23.pdf talks about residential power factor correction and my conclusion (from this article) is the savings would never be recouped. Second conclusion is the only benefit with correction is the wires between the source and load don't heat up as much. What about the wires in the motor or transformer? do they also heat less? I would think so. Third conclusion is by correcting power factor you are helping the utility company more than yourself because these phase differences standing waves exist all the way back to the power generation source therefore the utility lines have more loss due to their greater length than the customers building wiring has. The reason I am researching this is a customer of mine has roughly 50 hp of total motors in his shop and wanted to know if he could save 30% on his electric bill like some salesman of power factor correction black boxes told him he could. I realize I am going to have to look at his energy bill to see if there is a charge for low power factor and maybe call the utility company to see if he will get a lower rate if he adds PFC devices tom (\__/) ... (='.'=) ()_() _ Who's never won? Biggest http://music.aol.com/grammys/pictures/never-won-a-grammy?ncid=emlcntusmusi0 003 Grammy Award surprises of all time on AOL Music.
[Repeater-Builder] OT WTB, Blast from the past! Motorola L43GGB
One of my customers is looking for a Motorola L43GGB. Here is his post on QRZ with picture, it is a VHF base. Thanks to anyone that can help find him this radio. http://forums.qrz.com/showthread.php?t=192536 Reply directly to him or me and I'll forward. Rob - KS4EC
[Repeater-Builder] Re: Looking for UHF Radios for Repeater....
Do you just want to build a repeater for the sheer fun, joy of a project? If so, I have a post on my web page about my Mitrek conversion project: http://jonathan.con.musc.edu/weltonj/Amateur_radio_emergency_communic.ht m Instead of modifying a single unit, I used two Mitreks 1 for RX, the other for TX and set them up so I could swap them, e.g. if the TX final blows. It took me, oh, 50-60 hours altogether just tinkering to get it right. If you're looking to put up a repeater to meet a particular communications goal, and don't have a lot of time for a build, then the Kenwood TKR850 + RC210 controller for a bit under $2,000 is hard to beat. John/N4SJW --- In Repeater-Builder@yahoogroups.com, lou_c1357 lou_c1...@... wrote: OK so I have posted a few times about building a repeater. Well I think I am ready now to take the plung and start working on building a UHF repeater. So for a starting point I want to build a UHF (70cm) repeater. To start I am looking for a good radio that can be converted. What do you recommend that can be easily modified???
Re: [Repeater-Builder] Johnson vhf crystal repeater part number
Oops, sorry. Went into the dumpster already. - Original Message - From: Repeater-Builder@yahoogroups.com Repeater-Builder@yahoogroups.com To: Repeater-Builder@yahoogroups.com Repeater-Builder@yahoogroups.com Sent: Mon Feb 09 02:43:23 2009 Subject: Re: [Repeater-Builder] Johnson vhf crystal repeater part number Please dispose of it in my direction then. I can use it. Mike WA6ILQ At 08:19 AM 02/06/09, you wrote: Oh, ok. I will dispose of it then. I have no use for it. - Original Message - From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Sent: Fri Feb 06 10:07:09 2009 Subject: Re: [Repeater-Builder] Johnson vhf crystal repeater part number NORM KNAPP wrote: Hi, I got a preselector from a vhf johnson repeater. It has 9 slugs in it and 4 RCA jacks on it. It appears to have a built in preamp also. Is that what it is? Does it have a built in preamp or is that a mixer? Part number is TLE8023APR. Thanks! 73 de N5NPO Norm Oh-and it's UHF, not VHF.
RE: [Repeater-Builder] OT Power Factor
Tom, Excellent questions! The first is easy: Residences and light commercial occupancies have meters that measure real (true) power only. That's because only real power does work, and that's what you are paying for. The classic kWh meter with the spinning aluminum disk was perfected by Ferraris and Shallenberger more than a century ago, and millions are in service today. The most recent improvement is a magnetically-levitated disk that nearly eliminates any errors due to bearing friction. A revenue-grade kWh meter is extremely accurate, and very seldom requires service. True power is consumed only when the applied voltage and the resulting current are in phase. In this specific case, volts times amps equals watts. When the current is not in phase with the applied voltage, we enter the mysterious world of apparent power, which is expressed as volt-amperes. Nearly all apparent power seems to be consumed by inductive apparatus such as motors and transformers, except that such currents are returned to the source as the magnetic field collapses. Suffice it to say that the current actually flows in the circuit, but it does no real work. When the power factor (PF) is poor, a lot of current flows in the circuit that must be provided by the utility through larger diameter wires and bigger transformers. Since PF is the ratio of true power to apparent power, the utilities are always looking for ways to keep the PF close to unity, so that they can put off installing thicker wires and bigger substations. As an incentive for heavily-motored industries to increase the PF, some substantial penalties are levied on those who don't correct their PF. The easy way to increase the typical PF is to add parallel capacitance so that the inductive reactance is compensated by capacitive reactance. The goal is to get the PF above 0.95. Another reason for adding capacitors across the line is for voltage regulation. In rural areas with long distribution lines- usually at 12,000 volts- the voltage drop due to reactive currents can be significant. The utility will add capacitor banks every few miles to help keep voltage drop within narrow limits. This is as good a time as any to state that the standard nominal utilization voltage in the United States is 120/240 VAC on single-phase systems, and 120/208 VAC on three-phase systems. There hasn't been 110 or 220 in this nation for more than half a century, but some (usually older) folk still use those terms. The standard kWh meter does its magic by using a simple principle. The torque on the aluminum disk is caused by two coils (or sets of coils) that create a combined magnetic field. One coil creates a magnetic field proportional to the applied voltage, while the other coil creates a magnetic field proportional to the line current. When both voltage and current are present, the disk spins. A small permanent magnet acts as an eddy-current brake, and ensures that the speed of the disk's rotation is exactly proportional to the product of voltage and current that are in phase- true power. The disk is geared to a register that records the revolutions over time, resulting in power times time- energy. The rotating-disk kWh meter is being replaced with all-electronic meters in many areas. Such meters can record reactive power usage, and also record the times that peak demands occurred. Some really fancy electronic meters can be remotely polled with a wireless system, so the meter reader can drive by the house or business and get the data on the fly. Carrier-current data transfer systems are now in use that allow the utility to read meters from a central office that is miles away. Not only does the utility not have to set meter readers out into rural areas, but any power outage is immediately revealed due to the loss of data. Back to your original question about your customer's motors. If he is not being penalized by the utility for excessive reactive power demand (i.e., low PF) then he will save nothing. However, the judicious application of capacitors may improve the voltage regulation within his building. Some mountaintop repeater sites have a power feed that is many miles long, and voltage drop caused by air conditioning and power supplies can be significant. Some older Motorola and GE station supplies are not very efficient and have low PF when lightly loaded. The typical site owner/manager is usually not a power engineer, and may be ignorant of the significant inefficiencies of a low-PF power system. This may exist for years without anyone doing anything about it, leading to recurring station problems and poor power quality. The national standard for nominal utilization voltage is 120 VAC +/- 5%. If the receptacle voltage goes below 114 VAC or exceeds 126 VAC, something needs to be done. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Thomas Oliver Sent:
Re: [Repeater-Builder] OT WTB, Blast from the past! Motorola L43GGB
Yea, I have one. I just don't remember where! Those were nice old radios I always thought it was cool how the big M glowed when transmitting! I also have one tuned up on 52.525 MHz. -- Original Message -- Received: Mon, 09 Feb 2009 04:15:18 PM PST From: ks4ec r...@jfcsonline.com To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] OT WTB, Blast from the past! Motorola L43GGB One of my customers is looking for a Motorola L43GGB. Here is his post on QRZ with picture, it is a VHF base. Thanks to anyone that can help find him this radio. http://forums.qrz.com/showthread.php?t=192536 Reply directly to him or me and I'll forward. Rob - KS4EC
Re: [Repeater-Builder] OT Power Factor
Another point regarding line voltage issues, the distance from the substation or distribution system voltage regulators to the load may determine what you may see at the wall plug. Typically homes located closer to the substation (or regulator bank) will see higher voltages than those further away. This can be compensated for by the utility by changing the pole transformer taps, assuming that the transformer has taps. It can be a bit of a balancing act for the utility to hit that happy medium. Add to this the fact that many utilities implement load control measures in an attempt to curtail additional purchased power costs during adverse temperature extremes, especially during cold months. They shed load by reducing the line voltage for a period of time. Most customers never realize this, but it sometimes forces the utility to run their normal line voltages slightly high in order to have the headroom to be able to implement reductions, sometimes in multiple steps. Chuck WB2EDV - Original Message - From: Eric Lemmon wb6...@verizon.net To: Repeater-Builder@yahoogroups.com Sent: Monday, February 09, 2009 9:09 PM Subject: RE: [Repeater-Builder] OT Power Factor Tom, Excellent questions! The first is easy: Residences and light commercial occupancies have meters that measure real (true) power only. That's because only real power does work, and that's what you are paying for. The classic kWh meter with the spinning aluminum disk was perfected by Ferraris and Shallenberger more than a century ago, and millions are in service today. The most recent improvement is a magnetically-levitated disk that nearly eliminates any errors due to bearing friction. A revenue-grade kWh meter is extremely accurate, and very seldom requires service. [SNIP]
RE: [Repeater-Builder] wanted- macaroni fly back xfmr
Ted, Over on the yahoo Marconi group a thread on the fly back was hashed about. It was told that some less in demand models of test gear use the same parts. You might want to hop over there and see if the part can be crossed over. -Kevin _ From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Ted Bleiman K9MDM - MDM Radio Sent: Monday, February 09, 2009 3:07 AM To: repeater-builder@yahoogroups.com; motorola-u...@yahoogroups.com Subject: [Repeater-Builder] wanted- macaroni fly back xfmr hi gang. mdm here. i have a macaroni 2955 with a smoked flyback xfmr. repair shop can't find the part. someone must have a spare or a parts chassis somewhere. and help appreciaed greatly. this is a pristine monitor and i'd really like to get it fixed for my shop. thanks mdm ted thawing out in Chicago.. Ted Bleiman K9MDM MDM Radio If its in stock...we've got it! P O Box 31353 Chicago, IL 60631-0353 773.631.5130 fax 773.775.8096 web http://www.mdmradio.com http://www.mdmradio.com/ email - mailto:mdm...@yahoo.com mdmra...@yahoo.com DIRECT ALL EMAIL
