RE: [Repeater-Builder] Interference on VHF repeater
Had basically the same problem with w GE MASTR II repeater on VHF HI. The issue was with the repeater transmitter. When the repeater sat quiet for a while then it was keyed up the transmitter would have many spurs that would slowly travel up the band. This affected other repeaters that were open squelch or had the same PL. On the GE MASTR II PA there is a circuit just after the filter that was the problem. The tech had put a filter on the transmitter side to help with desense. This caused the network to be unbalanced and was causing the transmitter to spur. Once the transmitter ran for a while it cleared. David From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of brett Sent: Saturday, September 04, 2010 6:27 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Interference on VHF repeater Hi all, I have come across an interesting problem which you may be able to shed some light on. I have an intermod issue where my TX sometimes opens up my RX. I have the distinctive hollow pipe sound. Both TX and RX have the same CTCSS tone. The intermod product is however not always present, and after looking at the RX output from the duplexer with a SA I see a comb of products that move slowly in time. When one of the products in the comb falls within the RX bandwidth the RX opens, until it moves on. This is not a busy site, and I have been able to power down everything on site except my repeater. Problem remains unchanged. I have also disconnected feeders from all other RF equipment on site - still no change. The fact that the IM product frequency changes with time (drift rate is roughly a few kHz's an hour) makes me think that there is either another unknown source of RF on site which has poor freq stability (pretty unlikley), or somehow my TX freq is involved in producing this freq. I have inserted a 6dB pad in the antenna port of the duplexer and found that the IM products drop 12dB, and also curiously, the frequency of the products change. Removing the pad reverses this effect. I have repeated this many times and the result was always the same. It appears that the frequency of the IM product is dependent on the strength of the radiated field from my antenna. This is my question: I have read that it is possible for a strong EM field to excite metal (eg tower member) such that re-radiation will occur at a frequency which is different from that which excited it. Can anyone confirm they have seen this, or can anyone point me to a reference that talks about this? I should also mention there are multiple solar panels and associated regulators on site. The regulators have been discounted as possible sources, but the panels (given they may have bypass/blocking diodes) may be a mixing location, however the source of the drifting tone is still unclear. Thanks, Brett VK2CBD.
RE: [Repeater-Builder] Mastr II drift problem
Only if your crystals in the ICOMs are from BOMAR. David From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of steve Sent: Tuesday, August 03, 2010 5:33 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Mastr II drift problem Hello all, I have having a severe drift problem on my GE Mastr II 2 meter repeater. The transmit freq will drift nearly 2 KHZ over a 5-10 minute period. I have changed exciters and used a different ICOM but no improvement. The building that I am in is not ventilated and is very very hot. I put a high/low thermometer in and one day the high temp in the building was 114 degrees. Is this the problem? Thanks for any help. Steve W4SEF
RE: [Repeater-Builder] help and suggestions interference issues
Had an issue also with a dstar repeater. Seems that the repeater was co located with another analog repeater and when both transmitters came up I would see and hear the dstar signal on the input of my repeater. The two transmitters were mixing in a filter on the dstar antenna. Operators of the dstar repeater made adjustments to the filter and no longer see or hear the repeater. We are also using pl 123.0 and the dstar signal was keying the transmitter. Not sure why as the other transmitter is using a different pl tone. David From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of terry_wx3m Sent: Sunday, July 04, 2010 11:25 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] help and suggestions interference issues DSTAR is totally foreign to me. I can't think of anyone in the immediate area that even has a DSTAR capable radio. We are experiencing some interference on the input to one of our club repeaters. What baffles me is that the repeater is in PL (123.0). Is it possible that a DSTAR user in a neighboring area is inadvertently transmitting PL and getting into our machine? Also it would GREATLY help if someone had the capability of making me a short .wav clip of what DSTAR sounds like on an analog receiver. Thanks Terry wx3m.te...@gmail.com mailto:wx3m.terry%40gmail.com
RE: [Repeater-Builder] transmission is intermittent and voice cuts out with my mc-micro repeater
If the system that you are using has CTCSS then it sounds like your voice at times is causing the tone to not be decoded causing your voice to cut out. This happens if your deviation is too wide and/or your mic volume is too high. David From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of mimomeg Sent: Sunday, June 06, 2010 9:56 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] transmission is intermittent and voice cuts out with my mc-micro repeater Seem to have period where my transmission (voice) cuts out for a few seconds every so often, and the person at the other end can't hear me. On the receiving end,Does anyone have any idea? Thanks in advance,
RE: [Repeater-Builder] spectra tranceiver with 9a dual heads
If you have the software to program the radio there are help files. Just press f1 after opening up the program and reading the code plug. If you don't have the software then it is really hard (impossible) to add or delete modes. David From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of rwrodgers14 Sent: Friday, May 14, 2010 8:34 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] spectra tranceiver with 9a dual heads are there any specific shop manuals that explain how to erase and add modes or channels?
RE: [Repeater-Builder] Re: spectra tranceiver with 9a dual heads
Randy, once you load the codeplug hit the escape key. This brings you back to the main menu. Go to F4 then F5. This gets you to the MODE config menu. At the bottom of the screen F8 is the mode utility. At that point you can add or delete modes. Use the F1 key to get any help. Deleting trunking modes you will need the syskey. Hope this helps. David WA4ECM From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Randy Sent: Sunday, May 16, 2010 12:42 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: spectra tranceiver with 9a dual heads Thanks David, I'm very new to these radio's and i'm stumbling though it blind, I have checked out some of the help information but maybe i need to look a little harder for it. I so have the software on dos and have figures out how to archive and clone programs to other radio's. thanks again --- In Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com , David Murman dmur...@... wrote: If you have the software to program the radio there are help files. Just press f1 after opening up the program and reading the code plug. If you don't have the software then it is really hard (impossible) to add or delete modes. David From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com [mailto:Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com ] On Behalf Of rwrodgers14 Sent: Friday, May 14, 2010 8:34 PM To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Subject: [Repeater-Builder] spectra tranceiver with 9a dual heads are there any specific shop manuals that explain how to erase and add modes or channels?
[Repeater-Builder] NHRC3 for mastr II
I have an NHRC3-M11-00 with a com-spec encoder/decoder that I pulled from a mobile MASTR II that I am no longer using as a repeater. If anyone is interested in the controller I am asking $125.00 shipped. Please contact me off list if interested. David dmurmanATverizonDOTcom
RE: [Repeater-Builder] Fw: FCC RO Involving the Amateur 70cm Band
You know Motorola told us the same thing when our FD was getting interference from another jurisdiction on the same frequency. Well the ones that didn't know squat about radio listened to Motorola and well many times the mobiles could not even open the receiver because of the other transmitter capturing the receiver with no PL. Great technology but wrong reason. David From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Brian Raker Sent: Wednesday, March 03, 2010 5:55 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Fw: FCC RO Involving the Amateur 70cm Band Actually, DPL/PL doesn't help. It only signals to the receiver when to open squelch is all. If someone is transmitting and this thing decides to transmit at the same time, you'll get an earful of noise, PL or not. -Brian On Wed, Mar 3, 2010 at 3:02 PM, WA3GIN wa3...@comcast.net wrote: What? Just go and turn on your PL... come on! Lets use the technology that we claim we know so well... - Original Message - From: Brian Raker mailto:brian.ra...@gmail.com To: Repeater-Builder@yahoogroups.com Sent: Wednesday, March 03, 2010 4:51 PM Subject: Re: [Repeater-Builder] Fw: FCC RO Involving the Amateur 70cm Band So... is anyone gonna buy one of these things to see just what kind of interference it will actually make in the 70cm band? 1 watt max and .25 watt nominal is enough to key up a poorly tuned and set up nearby repeater or a distant sensitively configured repeater, and enough to produce decent QRM on existing nearby voice and data communications especially as it is using an analog video and operational control system. -Brian / KF4ZWZ On Wed, Mar 3, 2010 at 1:10 PM, Richard gbis-reply-...@gbis.com wrote: Since they'd be competing with high powered repeaters and government radars, I thought 2.4 gig would have been a better choice than 70cm, but that's just me... Richard www.n7tgb.net http://www.n7tgb.net/ Government's first duty is to protect the people, not run their lives. -- Ronald Reagan _ From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of DCFluX Sent: Wednesday, March 03, 2010 12:24 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Fw: FCC RO Involving the Amateur 70cm Band Take that crap up to 2.4 GHz with the rest of the garbage.
RE: [Repeater-Builder] PSE 508 Controllers
Yep been running one on our ARMY MARS repeater and working great. Bought another as a spare. David From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of John J. Riddell Sent: Sunday, February 14, 2010 3:06 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] PSE 508 Controllers Has anyone here used the Pion and Simon PSE508 series of controllers in a GE Mastr II ? Is the 508-3 with 4 channels of CTCSS worth considering ? 73 John VE3AMZ
RE: [Repeater-Builder] Spectra Scan
I don't have the radio or manual with me at this time but I think you need to program scan by going to F2 then select zones then select scan. I have my Spectra set up for Zones so I can have a different scan for the Zone I select. Hope this helps. David From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Kris Kirby Sent: Sunday, January 31, 2010 12:05 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Spectra Scan On Sat, 30 Jan 2010, N9WYS wrote: I am trying to program my 900 MHz Spectra for SCAN. This radio is modified for Conventional/Zones/MPL (with 120 modes). When I go into the CONVENTIONAL CONFIGURATION screen, I have no ability to select SCAN (neither ENABLED nor DISABLED) - NOTHING shows in the menu at all. I MUST be missing something, but I can't for the life of me figure out what it may be. I have the following MOFLAGS set: Bit Flag Setting 2 3 Conv_With_Sys_Scan = ENABLED 3 5 Conv_Message = ENABLED 3 7 Conv_Status = ENABLED 5 2 Conv_OpSel_Scan = ENABLED 5 6 NonPri_Mode_Slaved_Scan = ENABLED 5 7 Pri_Mode_Slaved_Scan = ENABLED What do I need to turn on in the MOFLAGS to get this to scan?? If you use the example MOFLAGS from Batlabs, the radio will be open to almost any feature the MLM supports. So if you use those MOFLAGS and it doesn't work, you probably need to change the MLM to one that supports conventional scan. -- Kris Kirby, KE4AHR Disinformation Analyst
[Repeater-Builder] Cushman CE31-B
Anyone have a service manual for the Cushman CE31-B service Monitor? David WA4ECM
RE: [Repeater-Builder] Spectra Audio Popping after Capacitor replacement
Yes, you are correct. The hear clear is only used in the 900 mhz spectra. Changing the CAPS should help especially aroung the audio amp chip. I have not had any issues with the VHF Spectras giving a popping sound except I had to replace the audio amp chip in one. It was fun to do but at the same time I replaced the capacitors. I purchased the audio amp chips from Motorola and they weren't too expensive. Sounds like you may have found your problem with the audio. Good luck in the repair of the Spectra. David -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Tim Ahrens Sent: Tuesday, November 24, 2009 10:32 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Spectra Audio Popping after Capacitor replacement Hi David, Is the Hear Clear board only on the 900 mhz spectras? I was looking in my service manual, and it talks about the board plugging into P501, but on my VHF spectras, this plug is unpopulated.. As a side note, when I went to replace the capacitors, I noticed that a fire ant had given it's life while spanning a couple of pins on the audio output TDAxxx part. There seemed to be some 'liquid ant residue' remaining, so perhaps it damaged the audio amp. I guess I'll have to look at the thing with the scope see what's going on in comparison to one that works 'correctly'. Thanks! Tim
RE: [Repeater-Builder] Spectra Audio Popping after Capacitor replacement
Had the same problem with a 900 mhz Spectra. The hear clear board was the problem. Changed it and the popping noise went away. David -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of tahrens301 Sent: Tuesday, November 24, 2009 2:43 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Spectra Audio Popping after Capacitor replacement Hi Folks, I've been working on these Spectras, and so far, the capacitors have done the trick. But on this last radio, the speaker pops whenever the audio path is open (unsquelched, signal, mode change, etc). Just curious if there's something I've missed. Thanks, Tim
RE: [Repeater-Builder] Off topic ... a time for God
AMEN! -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of ki4zji Sent: Saturday, November 21, 2009 9:29 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Off topic ... a time for God I am deeply offended by this. No, not the mention that we should take time out for God. I am offended by the barrage of tirades assaulting Lee for daring to mention God. Lee, good for you! Everyone who is a Christian should be a light in their community, drawing men to Jesus. Oh no - I mentioned Jesus. I guess I will get a box full of email telling me how offensive I am. Perhaps if I mentioned Buddha or Mohammad, I would be ok. But I dared to mention Jesus. Folks, if you live in the United States, you are living in a distinctively CHRISTIAN NATION. Get over the PC garbage that has polluted and is destroying our GREAT CHRISTIAN NATION. The United States is, after all, ONE NATION UNDER GOD. When our fathers founded this country, it was not founded on some nebulous supreme being, it was founded by Christians who were escaping religious persecution. They came to the New World because they wanted to freely worship Jesus. The original colonists as well as those who wrote the foundational documents of this country knew JESUS CHRIST as their personal LORD and SAVIOUR. To them, the name JESUS CHRIST was a name with power, a name to be honored and revered. The name of Jesus was not offensive and was certainly not a swear word to them. Some believe that if we call ourselves a Christian nation, we are forcing Christ on all people. Nothing could be farther from the truth. As Christians, who acknowledge the Bible as their final authority, we must admit that all people have a free will. If someone decides to follow another religion, that is their prerogative, their choice. There is no reason to be offended by that. It is sad to see such replies from what I thought was basically a good group of people. We can peaceably disagree on doctrine, denomination and even politics. That is our RIGHT as citizens. However, when one person is vilified for his willingness to ask you to take a moment out for God, regardless of who you may call God, there is a serious problem. The problem is not with Lee, the problem is with all of you who are persecuting him (and I suppose, now, me). Now, for what I am sure will be the final straw for some of you. I shall quote some Scripture. John 15:25 But this cometh to pass, that the word might be fulfilled that is written in their law, They hated me without a cause. They hated Jesus without cause. What was Jesus here for? To sacrifice Himself to save mankind from their sins. There was no reason for them to hate Jesus. He came to save us all. If I were to run headlong into a burning building to rescue someone from the fire, I would be lauded as a hero. If I should happen to get a little burn, the accolades would be greater. Jesus was God in the flesh. As God, who cannot sin, He took the all the sins of all the world upon Him. Imagine the guilt you would hopefully feel if you murdered an innocent child. Aside from the physical torture He endured in the process of the crucifixion, Jesus took all that guilt of all our sins upon Himself for us. Where are His accolades? Why is He not a hero among you? If you would like to discuss this with me, please email me directly. rr...@librtynet. mailto:rross%40librtynet.com com Sincerely, Randy
RE: [Repeater-Builder] Programming ASTRO SPECTRA Range2 to Range1
The RSS you have needs to be run on a DOS machine. I use an older 166 P1 machine that I bring up in DOS. I have Spectras on VHF high and 900 mhz. You will need to hack the software but you can find all the info you need on the WEB site BATLABS. I have my Spectra on both AF MARS and ARMY MARS repeaters here in the DFW area and have not seen any degradation in sensitivity or power. Good luck with programming the Spectra Astros. David -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of w7...@comcast.net Sent: Saturday, November 21, 2009 1:13 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Programming ASTRO SPECTRA Range2 to Range1 Greeting Group, I am new to Motorola ASTRO SPECTRA programming, and have been elected to program a few radios for our Base Support Team (USAF MARS). T04KLF9PW4AN-UCM radios - A5 head The RSS available is [RVN4001N] R06.00.05 Is this made for a DOS machine, or is it a Win 3.11 type RSS? Another snag is that the radios are on [Range 2], and I need to program [Range 1(142.xxx / 143.xxx)] frequencies into them! I think I have to do some hex editingis that correct? Is ther going to be a slight loss of sens., due to different preselectors? The radios will be used with a repeater that is within ten miles, so a little less sens. can be tolerated. I do appreciate any assistence and wisdom. Tim W7TRH __
RE: [Repeater-Builder] Antenna question
Have a G7-144 on our ARMY MARS repeater here and has been up since 1998 with no antenna issues. We removed the clamps and drilled holes after tuning the antenna to our frequency and used sheet metal screws to secure the tubing. The antenna is mounted on the top of a building about 180 ft. David -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Eric Lemmon Sent: Sunday, October 11, 2009 11:45 AM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Antenna question John, My suggestion is simple: Find the money to buy a decent antenna. Unless your time has no value, your gasoline is free, and you enjoy tower climbing, don't mess with cheap antennas. The great majority of available funds should go into the antenna, feedline, and outdoor mounting hardware- the things that are costly to buy, difficult to install, and the most likely to break during bad weather when it may be dangerous or impossible to get to the site to make repairs. Are you planning to support the Heliax with standoff cushion clamps made of stainless steel, or were you planning to just tie-wrap it to the tower legs? At $20 or so each, just the Heliax supports become a high-cost item when you install one every 3 or 4 feet. The indoor stuff like the repeater and duplexer can be upgraded over time, in the relative comfort and safety of the equipment shelter. Moreover, IMHO, it is not prudent to spend big bucks on the radio and duplexer up front, and then skimp on stuff that goes on the tower. The Hustler G7-144 is really too flimsy to have in repeater service where it is exposed to high winds and temperature extremes. I assembled a G7-144 antenna for my radio club's base station, and I took pains to use Penetrox on all aluminum joints and silicone sealant or Scotch-Kote on dissimilar-material joints. Despite these precautions, water leaked into the base and caused severe corrosion. It's practically junk now. If your repeater site is at one side of the desired coverage area, you might look into offset-pattern dipole antennas, Yagis, or corner reflectors. It makes no sense to put an omni antenna in service where all of the potential users are in one sector. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com [mailto:Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com] On Behalf Of W3ML Sent: Sunday, October 11, 2009 7:09 AM To: Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com Subject: [Repeater-Builder] Antenna question Hi again, We are looking to replace that used antenna after getting 100 feet of new Andrew 1/2 donated to our club. Now I realize that the DB type antenna is the best, but we do not have 800 bucks to buy one. So, my question is should we just get a new G7-144 to replace the used G7 or is there another type of vertical that we could get that would be good. Being in North Indiana, our winters can be quite brutal, so we would probably want something durable. Any suggestions. 73 John, W3ML
RE: [Repeater-Builder] Re: Radio for repeater use Response to Tom's comments
Sounds like he has a noise source near by causing him his problems. Probably not in the repeater at all. Had similar experience with a 50 mhz repeater located on a mountain top. Grounding wasn't the best and any noise generated by the wind moving the towers made the repeater at times almost unusable. Times signals were full quieting and then they were noisy. David -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Chuck Kelsey Sent: Monday, October 05, 2009 7:47 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Re: Radio for repeater use Response to Tom's comments I'd suggest turning the power up more. You have it set at about 50% and the transmitter may be intermittently spurious at that level. Watch the wattmeter when things act up and see if anything changes when you notice the desense happening. You can also pull the TX ICOM when the problem is happening and see if the receive clears up on the local speaker. There are so many things that could be at fault - loose connector, bad antenna, problem with transmitter, problem with receiver, intermod issue, etc. Ask the people you got the radio from if they had the same problem with it. Chuck WB2EDV - Original Message - From: W3ML w...@arrl.net mailto:w3ml%40arrl.net To: Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com Sent: Monday, October 05, 2009 8:33 PM Subject: [Repeater-Builder] Re: Radio for repeater use Response to Tom's comments Hi Tom, I did crank up the power to 55 watts out of radio and that gives me 45 out of the duplexer. Decided on this wattage until I can figure the problem better. It is working better than before, but still having trouble. So from what you said about power coming out duplexer, the duplexer must still be okay. However, during the day today there were 3 hams talking and they said (later) that all of them were loud and clear. But, when I got home and tried to call one of them, he was covered in noise. Later one of the others called in and he would be clear, then the repeater would cut out and his signal would be gone, then it would come back with noise on his signal and then clear again. Then the other one came in with a lot of noise, then he would come in with a little noise and then no noise at all and then back again through this cycle. This cycle of noise and then no noise is driving me crazy. The set up is this: GE Mastr II VHF mobile running into a 6 cavity duplexer set to our freqs with a service monitor prior to bringing it here. There is a bandpass filter on the receive side after the duplexer and before the radio. We have used 1/2 inch hardline going up to the used G7-144. Then only thing I can think of is the radio is bad, the antenna is no good and the coax is shot. Now, the radio was given to us by a group that had used it, but decided to replace it with a Kenwood. I am thinking that they had the same problem and that is why they gave it away. Any advice would be greatly appreciated. 73 John, W3ML - In Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com, W9SRV tgundo2...@... wrote: Ok- 1. Where are you checking the swr at in the chain? Make sure you bypass the duplexers to check the antenna, the cans can throw off the reading on some meters like you describe using. If you are less than 1.5:1 I would not worry too much more about it, any reflected power will get eaten up back in the cans. If you are really concerned about protecting the TX put a circulator in-line with it. 2. Make sure all the interconnecting cables are good shielded and not foil/ braid type. RG-213 and RG-400 are good choices, though there are a few more. 3. Terminate into a good dummy load. Set you output power to 80-90W. Then run thru the duplexer and check the power coming out of the cans. You should see something like 60-70w, depending on the spec of the duplexer. If your seeing much less than you may have a duplexer tuning issue. Figure out the real problem, let the radio run at a real spec power output, than absorb the title of far lord as every one thanks you for giving the repeater twice as many s-units. (then be prepared for the next round of complaints that become your problem) Tom W9SRV Sent from my iPhone On Oct 4, 2009, at 5:46 PM, W3ML w...@... wrote: No, except when it was at the 2o watts the swr was almost 1 and someone said that was the problem causing the de-sense. So we were afraid to run it higher. Like you said guess it was only a problem from running too little of power. Thanks and 73 John --- In Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com, W9SRV tgundo2003@ wrote: You answered your own question : So it appears that this radio, which is a GE Mastr II mobile, doesn't like to run at
RE: [Repeater-Builder] Re: Anybody have some REALLY old Moto manuals?
I have a manual for the old 150 - 174 MC T-Power that has the diagram for Carrier and Dual Squelch. Cannot find any reference to what the PL tones are but I would assume that they have not changed over the years. David -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of burkleoj Sent: Friday, September 18, 2009 9:35 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: Anybody have some REALLY old Moto manuals? Mike and Mike, I was the one who had one of the original invitations from Neil to come over and I asked Neil if Chris was welcome to join me. I just looked through the 30D manual set and there was no mention of PL Tones. But if anybody needs Dynamotor information, that I can help with. I am off to look through the 80D manuals now. Hopefully I find something there. I should of grabbed the manual on the first generation of UHF community repeaters that Motorola built. Joe --- In Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com, k7...@... wrote: Hi Joe, I was not sure who all went over and got all his stuff. I know Chris went over and got a bunch of hardware but If I know Chris he would never take Motorola manuals unless there was GE manuals. Mike From: Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com [mailto:Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com] On Behalf Of burkleoj Sent: Thursday, September 17, 2009 11:09 PM To: Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com Subject: [Repeater-Builder] Re: Anybody have some REALLY old Moto manuals? Mike and Mike, I have a Motorola twin coffin 30D set of manuals out of Neil's collection. I will have a look tomorrow and see what I can find out for you as to what is listed for PL Tones. Joe - WA7JAW --- In Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com , k7pfj@ wrote: Hi Mike, I would say Neil Mckie WA6KLA should help you out with any OLD Motorola manual that they have ever printed since 1948. But he has been locked up for several years and all of his stuff he gave away. Mike Mullarkey K7PFJ From: Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com [mailto:Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com ] On Behalf Of Mike Morris WA6ILQ Sent: Thursday, September 17, 2009 7:09 PM To: Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Subject: [Repeater-Builder] Anybody have some REALLY old Moto manuals? If so, I need a favor. The first implementation of PL used about 20 tones. The 32-tone standard list didn't come until later. Does anybody have a copy of that early tone list? It would have been somewhere in the 1950-1955 time frame. Thanks in advance. Mike WA6ILQ No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.409 / Virus Database: 270.13.104/2379 - Release Date: 09/17/09 15:55:00 No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.409 / Virus Database: 270.13.104/2379 - Release Date: 09/17/09 15:55:00
RE: [Repeater-Builder] Re: EOC Frequencies Available?
There are NO MARS frequencies for HAMS. David -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of WA3GIN Sent: Sunday, August 30, 2009 4:44 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Re: EOC Frequencies Available? The RACES freqs. have been closed down for some time now. Just no need for them. It wouldn't surprise me if MARS freqs. for hams also disappears. - Original Message - From: Chuck Kelsey mailto:wb2...@roadrunner.com To: Repeater-Builder@ mailto:Repeater-Builder@yahoogroups.com yahoogroups.com Sent: Sunday, August 30, 2009 4:21 PM Subject: Re: [Repeater-Builder] Re: EOC Frequencies Available? There used to be RACES frequencies, but I think that provision went away years ago. Not sure. Chuck WB2EDV . http://geo.yahoo.com/serv?s=97359714/grpId=104168/grpspId=1705063108/msgId= 93721/stime=1251663663/nc1=1/nc2=2/nc3=3
RE: [Repeater-Builder] Re: Closed Repeaters
I'm not sure how long many on this board have been in ham radio but years ago when getting a license for a ham repeater, yes there was a special license, it was mandatory that you had a receiver monitoring the output of your repeater and if the frequency was in use the repeater was not to transmit to cause interference to an existing conversation. Today if someone is using the output of a repeater frequency for a simplex conversation and someone else wanted to use the repeater then there would be interference to the conversation that was first on that frequency. Could this be considered malicious interference? There are enough simplex frequencies available that there should not be a need to use a frequency that has a repeater output. I listen/scan the basic simplex frequencies and usually hear one or two conversations a week. Most of the simplex frequencies never are used. David WA4ECM -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Cort Buffington Sent: Sunday, July 26, 2009 10:17 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Re: Closed Repeaters When you turn on your 2M radio and tune it to 146.520 and transmit it is now using public spectrum, move over, hand me you mic, I now have the RIGHT to use your radio. I think there is a premise problem here. I have never assumed that because I place a repeater on the air, on a frequency pair, that I have any expectation of exclusive right to those frequencies. Also consider how much of our debate is actually part 97 and how much we are debating long held best practice and gentleman's agreement. I don't think operating simplex on a repeater output is malicious interference if it's not walking over the repeater transmitter. I think if you want closed repeater access that you should use PL, or better, DPL, or best, DTMF access (turn it on when you use it). I think the number of times someone would operate simplex on a repeater input as a necessity of band congestion and just happen to use the same PL/DPL as the repeater is astronomical... unless the person were just trying to cause trouble... oh wait, that would then be malicious interference. I have the view I do on this because I do not hold the premise that because I have a coordinated repeater that I have the right to the spectrum. And actually none of us have the RIGHT to use the spectrum. We are granted the PRIVILEGE of using it by the government by obtaining the proper class amateur radio license. Getting along, being considerate, willing to compromise, and making and following our own rules is a big part of why the government has been as good as it has to Amateur radio. For example, there are no bandplans in part 97... those are things we agreed to on our own. Maybe if there's such a shortage of repeater frequencies and a huge pent up demand for them we should consider changing our bandplans? I know there are some areas of the country that have problems using 440 (I'm really sorry guys, I wish you didn't have those restrictions). the amateur 440 band is 30MHz wide. A repeater takes 2 x 5kHz channels. Jesus people, what are we fighting about? On Jul 26, 2009, at 8:14 AM, Dennis Zabawa wrote: The point has been made that a closed repeater (actually any repeater) is private property and others have no right to utilize it. I would agree to that premise except for the fact that the repeater utilizes PUBLIC spectrum. The analogy would be: I have a large tent that I like to set up on my property. If I take that same tent and permanently set it up in a public park and, I keep others from entering my tent, I am using PUBLIC property for my own, exclusive use. Would that set well with most of you? I have a closed repeater that has PUBLIC spectrum coordinated for it. That has the effect of allocating that PUBLIC asset for my exclusive use. Why should a repeater be different than the tent? -- Cort Buffington H: +1-785-838-3034 M: +1-785-865-7206
RE: [Repeater-Builder] Re: Echoing
Sounds like your transmitter has spurs and it is drifting getting into the receiver. I had this happen to a GE MASTR II repeater that one of the HAMS put a filter cavity on the transmitter to fix a desense problem. When the repeater was first keyed after being idle for a while it had spurs like crazy and not only caused interference to their repeater but others as it climbed up the band. Get a good spectrum analyzer and look at the spectrum that the transmitter is transmitting on. David -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Michael J.Talkington Sent: Monday, June 29, 2009 2:46 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: Echoing It sounds like it is repeating the same thing twice like a echo.Sometimes it starts to echo then it turns to noise till the user unkeys.I have not heard it in a week and sometimes it happens for hours.When this echoing is happening and the Repeater ids or says one of the messages stored in the controller it goes away.To me I think it does not happen because the receiver is not being used when the messages or id is happening as everyone waits till it is done.Thanks Mike KC8FWD --- In Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com, Eric Lowell elowell9...@... wrote: Can you define and describe what you mean by echoing? I've not heard that term used with regard to a repeater. Might be a regional usage? Thanks, de W1EL Eric Lowell Eastern Maine Electronics Inc. 48 Loon Road Wesley ME 04686 eme@... www.satnetmaine.com 207-210-7469 --- On Mon, 6/29/09, Michael J.Talkington kc8...@... wrote: From: Michael J.Talkington kc8...@... Subject: [Repeater-Builder] Echoing To: Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com Date: Monday, June 29, 2009, 9:27 AM Hello, The other day I overheard a few people talking about the local repeater echoing once in a while. I have heard it also and it is just random. now one of them said that the duplexers probably need retuned as the depth of the notch is not enough.Has any one ever experienced this before? thanks Mike KC8FWD
RE: [Repeater-Builder] Today's funny two-way radio story (March 09).The Siren - PA Speaker War
Interesting story. I work as a patrol deputy for the local sheriff's office and we normally test the lights and siren before going on patrol (won't give us take home vehicles). Our parking area is below the building and a few months ago we got word from the Sheriff that the testing of the sirens must be done away from the office. Seems the sound was getting to the administration area of the building and we were disturbing their afternoon nap LOL. David -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Rick Szajkowski Sent: Saturday, March 07, 2009 12:51 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Today's funny two-way radio story (March 09).The Siren - PA Speaker War Thanks Skipp needed a chuckle ! On Sat, Mar 7, 2009 at 11:39 AM, skipp025 skipp...@yahoo. mailto:skipp...@yahoo.com com wrote: Re: Today's funny two-way radio story (March 09). The Siren - PA Speaker War Today's very funny story was told to me by a friend after my seeing the evidence in a shop. A service call to fix the Siren on a Public Safety Vehicle with reported problematic volume level. Most radio type service people have a test method or routine to find the failed speaker, pa amplifier, broken wire or blown fuse. Lots of output voltage to the vehicle front mounted speaker, the type of which are sometimes problematic from weather/water damage. Off to the front bumper... Can't seem to get the speaker cone off... normally a tight but not a frozen screw-on fit. Out come the serious tools to break the speaker cone free. So... after a lot of work the cone comes off and there's a permanent thread locking glue on the cone threads. Hummm...? Wait! there's foam and a rubber plug inside the cone..? Someone wanted to reduce the speaker output level and lock it in place? Care to guess what's going on..? Well Sailors... A bit of detective work to figure out the owner of the vehicle has/had a habit of testing his full volume PA Siren functions very early every morning, while pulling out of his house/drive way. One of his nearby neighbors didn't appreciate the everyday wake up call and finally did the foam/rubber plug muffle trick and mounting thread lock to the bumper mounted siren speaker cone. Life goes on... Epilog: I/we do use the rubber plug and foam trick to reduce PA - Siren Volume levels while testing equipment. Helps on hearing and annoyance levels. Your results will probably vary... cheers, s.
RE: [Repeater-Builder] Six Meter Repeater Noise Issues
We had a similar problem years ago with a six meter repeater in Virginia. Problem was the site did not have a good ground and static would build up on the tower and antenna and cause all kind of noise on the receive signal. At first thought it was desense. Very difficult to get a good ground system on the mountain top. David -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Chuck Kelsey Sent: Thursday, December 25, 2008 11:35 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Six Meter Repeater Noise Issues If it's power line noise you can check by keeping your TX off and have someone with a noisy signal key up on the repeater input while you listen on the local receiver. You could use your signal generator into a whip antenna. You'll know if there's something in there. You won't hear it without an incoming signal, by the way. Chuck WB2EDV - Original Message - From: Scott mailto:sc...@becklawfirm.com To: Repeater-Builder@ mailto:Repeater-Builder@yahoogroups.com yahoogroups.com Cc: Scott mailto:sc...@becklawfirm.com Overstreet Sent: Thursday, December 25, 2008 12:18 PM Subject: Re: [Repeater-Builder] Six Meter Repeater Noise Issues Tom I think you have a corrosion problem in your antenna system. I had a similar if not identical problem in a 2 meter repeater hereyears of good performance and then serious desense. I ran the same tests as you have with same results. The fix here was an overhaul of the Hustler 144-G7 if I remember the numbers right. Corrosion was found in several places-fix was to clean down to bare metal to bare metal and reassemble with no-ox in the joint and more under several layers of shrink tubing over the top for weather protection. The antenna is still in service with no trouble. Corrosion in the antenna results in transmitter signal rectification within the antenna which produces noise of sufficient bandwidth to cover your receive frequency and this of course comes back down your feedline and properly goes right through your duplexer into your receiver. The curious thing is that under most conditions, this wide band noise results in desense without changing the audio noise output from your repeater receiver when your repeater transmitter is switched off. The fact that desense goes away when the antenna is replaced with a dummy---I assume that you are injecting your test signal into you receiver using an attenuating TI think your problem is your antenna or something very close by that it is exciting. Scott - Original Message - From: Tom Elmore mailto:t...@telmore.com To: Repeater-Builder@ mailto:Repeater-Builder@yahoogroups.com yahoogroups.com Sent: Tuesday, December 23, 2008 10:03 AM Subject: [Repeater-Builder] Six Meter Repeater Noise Issues Several months ago I put a six meter machine on the air in my area. It is a GE Master Pro tuned for 52.810 out and 51.110 in. One of the things still nagging me is some sort of desense or RF phase noise, let me explain. After tuning up the duplexers into a dummy load and running some tests I experienced no desense all the way down to about .15uV. I moved the dummy load to the end of the transmission line just to be sure and again the same results. When I put the antenna in line and run the same tests this is what occurs. When I key the transmitter and set the output of the signal generator from a starting point of say 100 uV I hear what sounds like phase noise or just plain static just slightly in the background. As I bring the signal generator output down the background noise gets louder but it never wipes out or overloads the receiver altogether as I can still hear the generator and the background noise and this is down to the same squelch threshold I get when on the dummy load. I am hesitant to call this desense as say when one of the duplexer cavities isn't tuned correctly. Then it is obvious because the transmitter totally wipes out the signal I am feeding it from the signal generator. I thought perhaps the preamp was the culprit so I took it out of line but sill experience the same issue. I am thinking that possibly the repeater output from the antenna is getting back into the repeater cabinet? I took a handheld scanner and set it on the same frequency as the receiver and connected directly to the rx port on the duplexer and can hear the noise there as well. I do hear a slight buzzing in the audio of the receiver almost like 60hz whenever I key the transmitter with the squelch wide open and no input signal present using the antenna. I don't hear it when using the dummy load though. I would like to think that the duplexer is tuned correctly or fairly close as there isn't any desense when terminated into a load. The last thing there is a single phase 7200 volt primary line servicing our neighborhood
RE: [Repeater-Builder] Desense has me pulling my hair out! (Was DB4060 Duplexer Cables
Have you look at your transmitter when the desense starts? David -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Mike Besemer (WM4B) Sent: Monday, October 06, 2008 7:39 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Desense has me pulling my hair out! (Was DB4060 Duplexer Cables Okay. I got the cable dilemma sorted out thanks to some photos I'd taken earlier, but I CANNOT get the desense out of these things. Some history: The cans and the repeater were both in storage for several years. We got a 'too good to be true' deal on the site and I pulled everything out of storage. The repeater (Mark 4) and cans were both originally on 146.85. The repeater was brought back to life on 145.11 and I tuned the cans using an HP-8920A. When I was done, I had no detectable desense either into the -8920A or at the site. Fast forward 2 months. The repeater goes deaf. I make a trip to the site (about 40 minutes) and find terrible desense. I blamed the service technician who'd just installed a new repeater for the BoE at the site, tweaked up the cans and everything was fine. for about a day. The repeater sounded great and the sensitivity was fine, but it had a terrible noise on transmit after it had been at rest for a while. About 2 minutes of RF would clean it up and it would work fine until it rested again for about 40 minutes. then it all started over again. The noise was only when the squelch was open. ID's and announcements were fine. (AH-HA!) I finally got a chance to make the trip back to the site and pulled everything home with me. I took a look at the repeater, just to give it a clean bill of health. It all looked good. I made only a few minor tweaks. The cans were noisy. I could turn the bandpass screws and I'd get noise on the receiver. That's what led me to pull the cans apart (below) to inspect and clean. There was some growth on the copper further up the outer tube, but nothing by the fingerstock. I have it a nice vinegar bath and cleaned it with a paint roller stuck inside the outer tube. It cleaned up nicely and I gave it a nice bath with the garden hose and baked the whole thing in the oven until it was good and dry. The entire process was repeated for each can. The enclosure with the notch capacitor was removed for this process, and the tuning rod screws were removed from the top to let the tuning rod drop down so I could get into the outer tube. After I put it all back together, I checked the fingerstock and it all looked good. Initial tuneup with the HP-8920 went fine and I soon had the repeater running through the cans into the -8920, breaking the squelch at about -116 dB with no detectable desense. Then. I went to bed. The next day, the desense was back with a vengeance. Been tuning for 2 days now (I thought I found it last night when I found a connector spinning on one of the cables going to the T-connector) and I CANNOT get rid of it. Sometimes it sounds like an AM radio driving under a power line. sometimes it just crackles. It's got to be microarcing somewhere, but I HATE taking those cavities apart again. (BTW, the cable with the spinning connector was replaced with good, MILSPEC RG-214 and MILSPEC connectors.) Have I missed anything? I'm really starting to think that these things are beyond salvage, but I sure hate to break that news to the club! Help! 73, Mike WM4B _ From: Mike Besemer (WM4B) [mailto:mwbesemer@ mailto:[EMAIL PROTECTED] cox.net] Sent: Sunday, October 05, 2008 9:10 PM To: 'Repeater-Builder@yahoogroups.com' Subject: DB4060 Duplexer Cables I spent the weekend working on a set of DB4060 cans (cleaning and retuning) and have managed to commit the ultimate stupidity. I had all the harnesses off and instead of MARKING them I just laid them out on the bench. Unfortunately, the bench got 'cleaned' and the cables are now all mixed up. I can tell which 2 cables went between the cans and which went to the T-connector, but all 4-cables are different lengths. I assume that the shorter of the two cables go on the TX (high) side of the cans and the shorter go on the RX (low) side of the cans. Am I correct? Thanks for the help. next time I'll mark the cables! 73, Mike WM4B
[Repeater-Builder] Looking for Cushman CE31B Service Manual or Schematics
I have a Cushman CE31B service monitor and need the service manual. Generator is ok but the receive is 12khz low. Thanks; David
RE: [Repeater-Builder] Registered Sex Offenders
The FCC issued an Order of Dismissal and Termination against Jack R. Sharples of Florida concerning the matter of his application for a new Amateur Radio license. In May, in a Hearing Designation Order, the FCC called Sharples a convicted felon and registered sexual predator, and said Sharples's felony conviction for at least one sexual-related offense involving children raises material and substantial questions as to whether he possesses the requisite character qualifications to be a Commission licensee. Although Sharples's felony adjudications occurred more than seven years ago, the nature of the criminal misconduct, and the fact that the Amateur Radio Service is particularly attractive to children, call into serious question whether he should be permitted to obtain an Amateur Radio authorization. Sharples had 20 days since the release of the HDO to file a written appearance; on June 19, he submitted to the Presiding Judge a document in which he set forth reasons for filing an [Amateur Radio license] Application, notwithstanding his felony convictions [and] the document was received as a good faith Notice of Appearance. Sharples, in a telephone call with the FCC requested more time to consider whether he would continue to prosecute his Application. The request was granted without objection. On June 27, Sharples sent a fax to the Presiding Judge withdrawing his application for an Amateur Radio license. The FCC's request to dismiss the application with prejudice and terminate the preceding was granted, as was Sharples's application for an Amateur Radio license, also with prejudice, on August 1. * FCC issues show cause order to Washington licensee: The FCC has asked David L. Titus, KB7ILD, of Seattle, Washington, to justify why his General class Amateur Radio license should not be revoked. The Commission Enforcement Bureau's January 30 Order to Show Cause in EB Docket No. 07-13 initiates a hearing process to determine whether Titus is qualified to remain a Commission licensee in light of a 1993 felony conviction for communicating with a minor for immoral purposes. According to the FCC order, Titus received a 25-month prison sentence, and the Seattle Police Department identifies him as a registered sex offender. The FCC says the Communications Act of 1934 provides that it may revoke any license if conditions come to its attention that would warrant a denial of the licensee's original application. The Commission said felony convictions, especially those involving sexual offenses involving children, raise questions regarding a licensee's character qualifications. While Titus's conviction was some 14 years ago, the nature of his criminal misconduct and the fact the Amateur Radio Service is particularly attractive to children call into serious question whether he should be permitted to retain his Amateur Radio authorization, the FCC said. Titus has 30 days to respond. The burden of proof in a hearing would be on the Enforcement Bureau. The show cause order is on the FCC Web site http://hraunfoss.fcc.gov/edocs_public/attachmatch/DA-07-377A1.pdf. -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Bill Hudson Sent: Sunday, August 10, 2008 1:38 AM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Registered Sex Offenders Paul Plack - Please site the law that forbids felons from having ham radio licenses. You act like you speak with authority - I'd like you to demonstrate it for me please. Bill - W6CBS _ From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Paul Plack Sent: Saturday, August 09, 2008 9:31 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Registered Sex Offenders If they're registered, that means they were convicted at one time, and probably have some condition of a parole or early release which prohibits contact with youth. I would ask the local police to see if that is the case. If it is, simply record the contacts, and ham radio will be the least of their concerns. If they were convicted of felonies, it's possible the FCC doesn't know, and would revoke their licenses if notified. 73, Paul, AE4KR - Original Message - From: Don mailto:[EMAIL PROTECTED] To: Repeater-Builder@ mailto:Repeater-Builder@yahoogroups.com yahoogroups.com Sent: Saturday, August 09, 2008 4:58 PM Subject: [Repeater-Builder] Registered Sex Offenders Hello I hope Everyone is doing Well , Some things We do not like talking about Except with our Ham friends Privately and I am sure My Topic is one that may effect all of us But I have a Question and I have got a lot of Opinions , But I Need to know if Anyone Has the Real answer and can Give ,Me the FCC Rule Etc A group of us are aware of a Couple Registered Sex Offenders who are Lic Ham Radio operators, They use some of the Local Repeaters . And have Engages in conversations with Lets say
RE: [Repeater-Builder] Re: PL Problem
Run all my repeaters with a tone of 600 hz. This is what GE recommended when I was in the 2-way business. So far all three repeaters, two VHF and one UHF have had no problem with any radio being able to decode the tone. David -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of nj902 Sent: Saturday, July 19, 2008 9:37 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: PL Problem Actually, what I think what I confirmed is that I passed reading comprehension... The Standard is 500 to 1000 Hz . Period. .. --- In Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com, Eric Lemmon [EMAIL PROTECTED] wrote: My statement about the definition of Standard CTCSS Modulation is correct, and thank you for confirming that. ...
RE: [Repeater-Builder] PL Problem
Isn't 1K a little hot for PL tone? David -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of tgundo2003 Sent: Friday, July 18, 2008 7:56 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] PL Problem I need some suggestions. It seems that my users that have newer Motorola Astro series radios have a problem on my Micor UHF repeater where the PL does not always open up their radios. It seems that it's only Astro type radios that have the problem. I have the PL Deveation set at 1K. It's generated internally on the uni-chassis TX PL board. I have 2 GP-300's, 1 MAxtrac, 1GM300, a Yeasu dual band Mobile and a Radio Shack HTX-404 (With an MDC board installed it in! I actually love that little radio) and None of them have any problems decoding the PL. So what's up with the new stuff? It it really picky? what else should I check? Thanks!! Tom W9SRV P.S.- I told them all to buy old radios and be done with it. Besides the TX audio out of the new stuff sucks anyways, IMHO, unless you like listening to over-processed crap ;)
[Repeater-Builder] Cushman CE-15 Spectrum analyzer
I have a Cushman CE-15 spectrum analyzer that was about 30 to 40 dB low in measuring signals. Traced the problem to the 2.1 Ghz bandpass filter. Looks like someone broke off the loop going to one of the connectors. Anyone on this group have one they are parting out and can PART with the 2.1 Ghz bandpass filter part number 2600? Thanks; David
Re: [Repeater-Builder] Re: Possible interference on 146.160
Yep. - Original Message - From: Jay Urish To: Repeater-Builder@yahoogroups.com Sent: Saturday, November 10, 2007 3:10 PM Subject: Re: [Repeater-Builder] Re: Possible interference on 146.160 Do you mean for FiOS? If so, thats not a modem.. It's an OPTICAL NETWORK TERMINAL. Think fancy media converter. David Murman wrote: I have found that the FIBER OPTIC modems that Verizon is installing has many spurious signals in the two meter band. Trying to get Verizon to replace my FIBER OPTIC modem with on that does not cause interference to the two meter band. Just my 2c David wa4ecm - Original Message - *From:* skipp025 mailto:[EMAIL PROTECTED] *To:* Repeater-Builder@yahoogroups.com mailto:Repeater-Builder@yahoogroups.com *Sent:* Saturday, November 10, 2007 11:39 AM *Subject:* [Repeater-Builder] Re: Possible interference on 146.160 Hi Ken, ATV activity... both from Amateur Operations and of course the import Wireless Video TV Extenders. Dont' forget the wonderful RF-ID tags. We're starting to get bombed by spread spectrum devices that are very hard to find/locate. In the UHF Band we have the now Famous Pave Paws System... and just to join in the fun we also have the Eplers System. A Repeater Site within a short distance of two large Air Force Bases is a very rough go... s. Ken Arck [EMAIL PROTECTED] wrote: I DESPISE the proliferation of all these unlicensed wireless devices cropping up these days (I saw the downward spiral in wireless professionalism starting when the FCC started eliminating 1st, 2nd and 3rd Class RadioTelephone licenses and replacing them with the - IMHO - useless General RadioTelephone ticket). But I digress... After many years of operation with no problems, about 2 weeks ago we started experiencing an intermittent hash type interference on my 434.xxx link receiver at one of my sites. It didn't appear on any other receiver up there - not the 146.320 nor the 446.900 one. When it occurs, it sounds a lot like horizontal sync buzz and usually lasts a few hours or so. Of course the link is toned so the buzz is a problem only as it relates to capturing a valid link signal being received. I went up to the site and luckily it was happening while I was there. According to my handheld, it was fairly weak and was wide - from about 200 kHz below my receive link channel to above it by almost 500 kHz. This seems a bit narrow to be a video signal but I noticed towards the high end of the range, the buzz fades only to be replaced by a quiet carrier. Strange I plan on taking my SA up there next week to see if I can better identify the offending signal but I suspect it's one of those low power, Part 15 434 mHz POS Ken -- Jay Urish W5GM ARRL Life Member Denton County ARRL VEC N5ERS VP/Trustee Monitoring 444.850 PL-88.5
Re: [Repeater-Builder] Possible interference on 146.160
I also had intermittent interference coming from two amateur repeaters. I maintain an ARMY MARS repeater and when repeater a and repeater B were on it produced a signal within 5 khz of the input to the ARMY MARS repeater. Both amateur repeaters were located on top of the same building. The MARS repeater was located some miles away. It took a little looking at a spectrum analyzer to find the two. Repeater A minus repeater B plus repeater A = interference to MARS repeater. David - Original Message - From: Nate Duehr To: Repeater-Builder@yahoogroups.com Sent: Saturday, November 10, 2007 9:34 PM Subject: Re: [Repeater-Builder] Possible interference on 146.160 On Nov 10, 2007, at 4:52 AM, Ron Wright wrote: Bruce, I have a 146.04/64 repeater and for years have noticed weak signals roaming in the bottom part of 146. I had thought it was from cable, but have not been able to verify or locate. A local 146.67 repeater has the most server problem with a weak signal opening its receiver often (it is not toned). 73, ron, n9ee/r Noise is noise, I don't think there's any particular relationship between the part of the band being hit and the noise sources that are typical. I've been struggling to find a weak carrier on the input of our 147.225 (147.825 input) repeater for years... -- Nate Duehr, WY0X [EMAIL PROTECTED]
Re: [Repeater-Builder] Possible interference on 146.160
The fix was repeater A to replace a notch filter they had on the repeater to notch out repeater B. David - Original Message - From: Nate Duehr To: Repeater-Builder@yahoogroups.com Sent: Sunday, November 11, 2007 3:40 PM Subject: Re: [Repeater-Builder] Possible interference on 146.160 On Nov 11, 2007, at 8:34 AM, David Murman wrote: I also had intermittent interference coming from two amateur repeaters. I maintain an ARMY MARS repeater and when repeater a and repeater B were on it produced a signal within 5 khz of the input to the ARMY MARS repeater. Both amateur repeaters were located on top of the same building. The MARS repeater was located some miles away. It took a little looking at a spectrum analyzer to find the two. Repeater A minus repeater B plus repeater A = interference to MARS repeater. That math works out on any three repeaters with the same offset. Doesn't matter if they're Amateur, MARS, commercial... 5 MHz split on all three, means there's an opportunity to mix from two transmitters plus one input, to another input. What would be more interesting is what you did to mitigate it. Was the mix happening externally or in one of the systems? Someone forget to install an isolator? Little to no filtering on a high-level pre-amp on the MARS repeater? What was it? -- Nate Duehr, WY0X [EMAIL PROTECTED]
Re: [Repeater-Builder] Possible interference on 146.160
Not really sure but when they changed the notch filter the spurious signal went away. It was a fairly strong carrier. David - Original Message - From: Nate Duehr To: Repeater-Builder@yahoogroups.com Sent: Sunday, November 11, 2007 4:16 PM Subject: Re: [Repeater-Builder] Possible interference on 146.160 On Nov 11, 2007, at 2:48 PM, David Murman wrote: The fix was repeater A to replace a notch filter they had on the repeater to notch out repeater B. That's interesting. On their receiver? Miles away from your machine? Pretty good mix to be strong enough to be seen miles away. Wonder what was doing it in their system? -- Nate Duehr, WY0X [EMAIL PROTECTED]
Re: [Repeater-Builder] Re: Possible interference on 146.160
I have found that the FIBER OPTIC modems that Verizon is installing has many spurious signals in the two meter band. Trying to get Verizon to replace my FIBER OPTIC modem with on that does not cause interference to the two meter band. Just my 2c David wa4ecm - Original Message - From: skipp025 To: Repeater-Builder@yahoogroups.com Sent: Saturday, November 10, 2007 11:39 AM Subject: [Repeater-Builder] Re: Possible interference on 146.160 Hi Ken, ATV activity... both from Amateur Operations and of course the import Wireless Video TV Extenders. Dont' forget the wonderful RF-ID tags. We're starting to get bombed by spread spectrum devices that are very hard to find/locate. In the UHF Band we have the now Famous Pave Paws System... and just to join in the fun we also have the Eplers System. A Repeater Site within a short distance of two large Air Force Bases is a very rough go... s. Ken Arck [EMAIL PROTECTED] wrote: I DESPISE the proliferation of all these unlicensed wireless devices cropping up these days (I saw the downward spiral in wireless professionalism starting when the FCC started eliminating 1st, 2nd and 3rd Class RadioTelephone licenses and replacing them with the - IMHO - useless General RadioTelephone ticket). But I digress... After many years of operation with no problems, about 2 weeks ago we started experiencing an intermittent hash type interference on my 434.xxx link receiver at one of my sites. It didn't appear on any other receiver up there - not the 146.320 nor the 446.900 one. When it occurs, it sounds a lot like horizontal sync buzz and usually lasts a few hours or so. Of course the link is toned so the buzz is a problem only as it relates to capturing a valid link signal being received. I went up to the site and luckily it was happening while I was there. According to my handheld, it was fairly weak and was wide - from about 200 kHz below my receive link channel to above it by almost 500 kHz. This seems a bit narrow to be a video signal but I noticed towards the high end of the range, the buzz fades only to be replaced by a quiet carrier. Strange I plan on taking my SA up there next week to see if I can better identify the offending signal but I suspect it's one of those low power, Part 15 434 mHz POS Ken
Re: [Repeater-Builder] Digipeater deviation
You bet. Normal deviation is + - 5 KHZ. The old wideband FM deviation was + - 15 KHZ. David - Original Message - From: Nevada Amateur Radio Repeaters, Inc. To: Repeater-Builder@yahoogroups.com Sent: Saturday, September 15, 2007 11:08 AM Subject: [Repeater-Builder] Digipeater deviation What is the allowable deviation for a two meter digipeater in amateur service? Is 15 kHz excessive?
[Repeater-Builder] Cushman CE-15 Spectrum Analyzer
I have a Cushman CE-15 Spectrum Analyzer that was working and recently I noticed signals very weak. When measured they are 30dB down. I have checked the Diodes in the RF attenuator and they check good. I noticed the schematic I got off the repeater builders WEB page that the ref level switch does not correspond to what I measure on the 4 lines going to the RF attenuator. The Cushman I have is black in color on the face. The switch going to the IF switchable gain and BW check out ok. Any idea where else to look for the 30dB loss? Anyone have a good schematic on this spectrum analyzer? I am borrowing another spectrum analyzer to look closer at the RF attenuator to see if the diodes are leaky. No RF was transmitted into the Cushman. Thanks; David WA4ECM
