Re: [Repeater-Builder] antenna plan
I had a corner reflector on my very first UHF ham repeater for a while. No problems with duplex operation or anything. The pattern was pretty much as you see in the catalogs. The front to back ratio was remarkable. After a while, I got some more money and changed it out. Best Regards, W1EL Eric Lowell Eastern Maine Electronics Inc. 48 Loon Road Wesley ME 04686 eme@starband.net www.satnetmaine.com 207-210-7469 From: Paul Holm To: Repeater-Builder@yahoogroups.com Sent: Thu, August 19, 2010 10:25:51 PM Subject: Re: [Repeater-Builder] antenna plan Hopefully it is not uncool to be the first to respond to one's own post. I'll take the fact that there was no flood of flames, or naysayers, to indicate that my plan is worth attempting. So as a follow-up question, I would ask, could anyone offer recommendations for a yagi, corner reflector, or other directional antenna, suitable for duplex use, with a beamwidth of no less than 30deg and a gain of no less than say 7dB? 73 Paul - Original Message - >From: Paul Holm >I'm looking for input on an antenna plan. > >I'd like to change to an ellliptical pattern that favors the bigger town in >the >county which is roughly at 270 deg west and about 6 miles away. > > >I'd like to take a yagi or corner reflector and mount it lower, at the railing >or a short distance up the mast, and point it at the town I'd like to focus on > > > I
Re: [Repeater-Builder] OT Looking for service manual Kenwood TM-733A
Mods.dk has a schematic. Eric Lowell Eastern Maine Electronics Inc. 48 Loon Road Wesley ME 04686 eme@starband.net www.satnetmaine.com 207-210-7469 From: Milt To: Repeater-Builder@yahoogroups.com Sent: Mon, May 24, 2010 8:48:33 AM Subject: Re: [Repeater-Builder] OT Looking for service manual Kenwood TM-733A Thank you Mike, but that scan is the instruction manual not the service manual. Milt N3LTQ - Original Message - From: "Mike Morris" To: Sent: Thursday, May 20, 2010 12:54 PM Subject: Re: [Repeater-Builder] OT Looking for service manual Kenwood TM-733A > At 08:10 AM 05/20/10, you wrote: >>Looking for service manual for the TM-733A radio in >>paper(preferred)or electronic format. >> >>B51-8264-00 original or >>B51-8264-10 revised >> >>Document is NLA from Kenwood >> >>Thanks >> >>Milt >>N3LTQ > > Google is your friend. I typed in the following and > found four sources in 2 minutes. > kenwood tm-733 manual > > I put the best/clearest of the four on the Kenwood page > at repeater-builder. It's a 13.8 MB download. > > Mike WA6ILQ > > > > > > > > Yahoo! Groups Links > > >
Re: [Repeater-Builder] Re: A warning to Land Mobile Radio Dealers
Seems like that happened a while ago. Eric Lowell Eastern Maine Electronics Inc. 48 Loon Road Wesley ME 04686 eme@starband.net www.satnetmaine.com 207-210-7469 From: Mike Besemer (WM4B) To: Repeater-Builder@yahoogroups.com Sent: Sat, May 1, 2010 3:17:16 PM Subject: RE: [Repeater-Builder] Re: A warning to Land Mobile Radio Dealers Kinda wandering off repeaters here, aren’t we? Mike WM4B From:Repeater-Builder@ yahoogroups. com [mailto:Repeater- buil...@yahoogro ups.com] On Behalf Of Matthew Kaufman Sent: Saturday, May 01, 2010 3:06 PM To: Repeater-Builder@ yahoogroups. com Subject: Re: [Repeater-Builder] Re: A warning to Land Mobile Radio Dealers Brian Raker wrote: > > > §97.111 Authorized transmissions. > (a) An amateur station may transmit the following types of two-way > communications: > ... > (3) Transmissions necessary to exchange messages with a station in > another > FCC-regulated service while providing emergency communications; > > Yes, we are allowed to do so only while providing emergency > communications. It's up to us to determine (hopefully with a good > helping of common sense) what is an emergency. Actually that's pretty easy. See 97.403 and 97.405. Matthew Kaufman
Re: [Repeater-Builder] CAD program for documenting antennas on towers
I worked for a paging company years ago, and we used Visio to diagram the towers for MPE (maximum permissible exposure) compliance work. Visio is not specific to tower drawing, and I found it non-intuitive to use. Having said all that, It did the job. Eric Lowell Eastern Maine Electronics Inc. 48 Loon Road Wesley ME 04686 eme@starband.net www.satnetmaine.com 207-210-7469 From: Joe To: Repeater-Builder@yahoogroups.com Sent: Wed, April 28, 2010 10:20:09 AM Subject: [Repeater-Builder] CAD program for documenting antennas on towers Does anyone know of a program specifically for towers to do drawings? Not just a CAD program, but something designed specifically for towers. Free or paid is OK. Just thought I'd take a long-shot that something may be out there. 73, Joe, K1ike
Re: [Repeater-Builder] Helix / Connectors
LDF4 with the non-plated connectors, well waterproofed, will last a decade+. GL de W1EL Eric Lowell Eastern Maine Electronics Inc. 48 Loon Road Wesley ME 04686 eme@starband.net www.satnetmaine.com 207-210-7469 From: Kris Kirby To: Repeater-Builder@yahoogroups.com Sent: Mon, March 29, 2010 2:10:56 PM Subject: [Repeater-Builder] Helix / Connectors Andrews LDF4: Any thought, comments about L4TNF-PS vs L4PNF-RC? -RC is a captivated pin connector which is gold and silver, the other connector is bronze inner, trimetal housing. I'm thinking that the less potential metal interaction, the longer the coax will last. I've also seen Trilogy listed in the same transmission line category, which uses a solid aluminum tube for an outer connector and a solid copper tube for the inner connector. The only issue I see there is the thermal expansion coefficient, or how much is my cable gonna grow from cold to warm days? This needs to last a decade. Station is not duplex, (originally quoted as LMR-600), but since the install needs to last a decade, I need good stuff. -- Kris Kirby, KE4AHR Disinformation Analyst
Re: [Repeater-Builder] Copper pipe rather than 2/0 copper wire
It will work, you just have to bond each 10' section to the next with something other than soft solder. Lightning will blow lead solder right out of a joint. Cadweld would probably be best. GL, Eric Eric Lowell Eastern Maine Electronics Inc. 48 Loon Road Wesley ME 04686 eme@starband.net www.satnetmaine.com 207-210-7469 From: Jesse Lloyd To: Repeater-Builder@yahoogroups.com Sent: Tue, March 16, 2010 11:41:43 AM Subject: [Repeater-Builder] Copper pipe rather than 2/0 copper wire Hey All, I am thinking about lightening protection for a site and using 1/2 copper pipe runs rather than a heavy guage wire like 2/0. 1/2 copper is about $2.20 a ft, while 2/0 is about $3/foot... and 2/0's diameter is about 0.36 inches so bang for the buck 1/2 copper pipe seems the way to go. I know skin effect plays a big role in lightening since its mainly RF, what do you think about the idea? Cheers, Jesse Y
Re: [Repeater-Builder] Noise Level on a Duplexer
Kent, I have seen this sort of problem before in a simaler application. I believe that your duplexer may have a bad internal connection, possibly at a fingerstock contact. In my case the problem was solved by replacing the duplexer. I believe the problem was caused by tuning the duplexer under power rather than with a network analyser. This occured many years ago, so my memory may be faulty. Best Regards de Eric (W1EL) Eric Lowell Eastern Maine Electronics Inc. 48 Loon Road Wesley ME 04686 eme@starband.net www.satnetmaine.com 207-210-7469 From: Kent Chong To: Repeater-Builder@yahoogroups.com Sent: Tue, March 9, 2010 10:31:30 AM Subject: Re: [Repeater-Builder] Noise Level on a Duplexer Dear Joe, Yes, we have observed the signal with a spectrum analyser. It is a broadband noise covering our entire TETRA band. Yes, the transmitter is keyed up continually. Regarding oscillation, what circuitry will develop the oscillation in 3 days? We are thinking about the heat problem too, as heat may be developed overtime. Best Regards, Kent --- On Tue, 9/3/10, Joe wrote: >From: Joe >Subject: Re: [Repeater-Builder] Noise Level on a Duplexer >To: Repeater-Builder@ yahoogroups. com >Date: Tuesday, 9 March, 2010, 8:52 PM > > > >Hello Kent, > >Have you looked at the noise on a spectrum analyzer? Is is broadbanded >noise, or is it just on your receiver frequencies? If it is only on >specific frequencies, is it frequency stable or does it drift around? > >Also, do any of your transmitters stay constantly keyed up? > >I'm wondering if something external to your system is oscillating. Your >signals may be causing it to go into self-oscillation. When you shut >your system off it stops. This is just a guess right now. > >73, Joe, K1ike > >> >> >> <http://sg.rd. yahoo.com/ sg/mail/domainch oice/mail/ signature/ >> *http://mail. promotions. yahoo.com/ newdomains/ sg/> > Get your new Email address! Grab the Email name you've always wanted before someone else does!
Re: [Repeater-Builder] Unlawful in Il to Rebroadcast Public Safety Communications
Wow! I would have thought it illegal under Federal Law. What do I know Best Regardss, de W1EL Eric Lowell Eastern Maine Electronics Inc. 48 Loon Road Wesley ME 04686 eme@starband.net www.satnetmaine.com From: ka9qjg1 To: Repeater-Builder@yahoogroups.com Sent: Thu, February 18, 2010 9:27:44 PM Subject: [Repeater-Builder] Unlawful in Il to Rebroadcast Public Safety Communications FYI It is now Against the Law in Il To Rebroadcast Public safety Communications including radio or Internet I know most of us in this Hobby are aware of all the Scanner Type Communications being linked d to the Internet. I always wondered about the legality of doing this especially living in one of the Few States that have an Anti Scanner Law against mobiles and Handhelds unless one is exempt. I always liked the idea of seeing something big on the News and finding a site from that area to listen to it Live . Well it looks like Il has put together a law against doing this I do not know about other states . Or how this is going to stop the On Line Scanner stations. Also as written unless I have permission it looks like I cannot rebroadcast the Amber Alerts which come out over My Emerg Weather Receive on My Repeaters I "am sure others have this on the Repeters too This will be interesting to see if anyone is a actually charged with this Don KA9QJG Statutes Amended In Order of Appearance 20 ILCS 2615/11 new 20 ILCS 2615/12 new Synopsis As Introduced Amends the State Police Radio Act. Provides that a person receiving public safety voice or data communication transmitted via the facilities of the State's public safety radio system by wire or radio shall not, without the written authority of the originator of the communication, rebroadcast the communication via any means, including radio or Internet, or otherwise divulge or publish the existence, contents, substance, purport, effect, or meaning thereof. Provides that this provision does not apply to the public safety radio communication transmitted by any system station for the use of the general public, including Amber Alerts and other communications specifically intended for rebroadcast to the public. Provides that radio access to the public safety radio system within the State may only be accomplished upon receipt of written authorization granted by the appropriately licensed authority. Provides that a violation of these provisions is a Class A misdemeanor. Effective immediately. http://tinyurl. com/yf3on2y
Re: [Repeater-Builder] Service Monitor Input Protection
Cushmans used low value fuses for years. Eric Lowell Eastern Maine Electronics Inc. 48 Loon Road Wesley ME 04686 eme@starband.net www.satnetmaine.com 207-210-7469 From: James To: Repeater-Builder@yahoogroups.com Sent: Tue, January 5, 2010 5:30:00 PM Subject: [Repeater-Builder] Service Monitor Input Protection Hello to the group. Knowing most of you have service monitors for the Repeater Builder Hobby, I wanted to pose the following question. What method do you use to protect the input of your service monitor from excessive RF Power input? I am referring to the input/output jack that is limited to 2.5 watts on MANY service monitors. I know I can use an attenuator, but that gets removed for sensitivity checks and may not get put back on. One suggestion is a RF Relay that would trip on say one watt and put the power to a dummy load. The problem is I have used one of the cheap circuits in the past and toasted transistors in a Pre-amp, before the relay reacted as the book said it should. However I know there are circuits in say the Mirage Amp that also has a Pre-Amp that is removed from the antenna during transmit, that works well. What are you doing to protect your monitor? Appreciate your thoughts. 73 JIM KA2AJH
Re: [Repeater-Builder] Best coax for marine use
He'll get as far or further than the hundreds of RG58 installations I've seen. I was at least attempting to offer a helpful opinion rather than trolling. Eric Lowell Eastern Maine Electronics Inc. 48 Loon Road Wesley ME 04686 eme@starband.net www.satnetmaine.com 207-210-7469 From: Vernon Densler To: Repeater-Builder@yahoogroups.com Sent: Tue, November 24, 2009 1:14:09 PM Subject: RE: [Repeater-Builder] Best coax for marine use But how far can you get on the less than 9 watts you will have left after using a cable with that much loss? From:Repeater-Builder@ yahoogroups. com [mailto:Repeater- buil...@yahoogro ups.com] On Behalf Of Eric Lowell Sent: Tuesday, November 24, 2009 12:39 PM To: Repeater-Builder@ yahoogroups. com Subject: Re: [Repeater-Builder] Best coax for marine use The only issue I would have with Heliax is the possiblity of cracked and broken solid conductors due to vibration and repeated flexing. If I were the vessel owner, I'd use a good grade (Belden or equivalent) of RG-8 (X if you want). There are not a lot of terrain features out there. I'd think you could talk quite a ways on 25 watts at 70 feet HAAT. 75-100 miles? GL, Eric Eric Lowell Eastern Maine Electronics Inc. 48 Loon Road Wesley ME 04686 eme@starband. net www.satnetmaine. com From:Vernon Densler To: Repeater-Builder@ yahoogroups. com Sent: Tue, November 24, 2009 11:17:45 AM Subject: [Repeater-Builder] Best coax for marine use I have been in a big discussion with the guys on my boat list about the right coax for running up the mast for VHF marine radio. Keeping in mind that we are talking about a 70’ or so run going up the center of an aluminum mast, in a salt water environment, and the radio is limited to 25 watts. Also keep in mind that when off shore this is a life line and the best possible send and receive is needed in an emergency situation. So given the criteria what is the best possible coax to use knowing that thickness matters and bend radiuses may be tight? Others on the list are saying “just grab any old 8X type cable and you will be fine”. I say use something with very low loss and suggested small heliax. Any suggestions? Vern s/v Nirvelli KI4ONW
Re: [Repeater-Builder] Best coax for marine use
The only issue I would have with Heliax is the possiblity of cracked and broken solid conductors due to vibration and repeated flexing. If I were the vessel owner, I'd use a good grade (Belden or equivalent) of RG-8 (X if you want). There are not a lot of terrain features out there. I'd think you could talk quite a ways on 25 watts at 70 feet HAAT. 75-100 miles? GL, Eric Eric Lowell Eastern Maine Electronics Inc. 48 Loon Road Wesley ME 04686 eme@starband.net www.satnetmaine.com From: Vernon Densler To: Repeater-Builder@yahoogroups.com Sent: Tue, November 24, 2009 11:17:45 AM Subject: [Repeater-Builder] Best coax for marine use I have been in a big discussion with the guys on my boat list about the right coax for running up the mast for VHF marine radio. Keeping in mind that we are talking about a 70’ or so run going up the center of an aluminum mast, in a salt water environment, and the radio is limited to 25 watts. Also keep in mind that when off shore this is a life line and the best possible send and receive is needed in an emergency situation. So given the criteria what is the best possible coax to use knowing that thickness matters and bend radiuses may be tight? Others on the list are saying “just grab any old 8X type cable and you will be fine”. I say use something with very low loss and suggested small heliax. Any suggestions? Vern s/v Nirvelli KI4ONW
Re: [Repeater-Builder] Radio conversion to 225MHZ
I did a Micor mobile once (VHF-Hi to 220) It was a lot of work and the PA won't convert, so you need to address that. Also did a GE MPI portable, Came out okay, but a rock bound 2 watt, 2 channel portable is not really worth the effort, given the cost of Icom 3ATs etc. Not sure about the newer stuff. GL de W1EL Eric Lowell Eastern Maine Electronics Inc. 48 Loon Road Wesley ME 04686 eme@starband.net www.satnetmaine.com --- On Wed, 10/14/09, J wrote: From: J Subject: [Repeater-Builder] Radio conversion to 225MHZ To: Repeater-Builder@yahoogroups.com Date: Wednesday, October 14, 2009, 7:41 PM Has anyone converted any of the commercial (GE/Motorola) radios to the 220 band? If so what works and what doesnt. I need several 225 radios and thought this might be a route to go. Thanks in advance Jim
Re: [Repeater-Builder] Re: Radio for repeater use Response to Tom's comments
Your antenna needs to come down and be gone over before you buy anything new. Those G7s will get bad connections in them that act like diodes and rectify all kinds of crud to desense your otherwise good system. I understand that there is a document on the RB site about refurbing that antenna. You may have heard this before. Good Luck, Eric (W1EL) Eric Lowell Eastern Maine Electronics Inc. 48 Loon Road Wesley ME 04686 eme@starband.net www.satnetmaine.com --- On Tue, 10/6/09, W3ML wrote: From: W3ML Subject: [Repeater-Builder] Re: Radio for repeater use Response to Tom's comments To: Repeater-Builder@yahoogroups.com Date: Tuesday, October 6, 2009, 5:36 PM Well Chuck, there will be no new radio unless I buy it out of my pocket and that won't happen as I need a new rotor. This club has no money. I was able to get a grant for emergency communications and that is how I ended up with the stuff we have now. My big problem seems to be that I took this radio in for free instead of buying one from that ham in Florida that sells GEs for repeaters. As I have said before being a ham for 30 years now has taught me nothing about the maintenance of a repeater. I have built rigs before and trouble shot many a good HF radio, and now I am actually somewhat having fun playing with this thing. I have done more reading on repeaters than I have at my regular job and that is the Teaching of English Literature. Of course if we were to buy a new one, hi hi, then there would be nothing to learn and we all need to keep learning to keep our brains working. I really appreciate everyone on here helping out not only myself, but the others that come on here who need help and are just starting out in this area of ham radio like me. 73 John --- In Repeater-Builder@ yahoogroups. com, "Chuck Kelsey" wrote: > > John - > > A word of caution may be in order since you are dealing with a club. > > These days, the typical ham doesn't begin to comprehend the complexity of a > repeater system. To many, one simply needs to go out a purchase new > equipment, plug it all together, and it runs. Wrong! > > Don't let your club go down that path. The end result will be lots of money > being spent and unhappy results. I've watched it happen. > > If you are running a repeater, you WILL have problems with it, no matter > what brand of equipment you use, no matter if it's new or used. > > You appear to be taking the steps to learn about it. It's the only way > you'll be able to cope unless the club pays a commercial two-way shop to > maintain the system. > > In the meantime, keep plugging away. It can get very frustrating at times. > > Chuck > WB2EDV > > > > - Original Message - > >> > >> I will go read that article. Thought I read them all, since January, > >> trying to learn all I can. > >> > >> That is when I decided to get into this repeater business. It has been a > >> great learning experience for sure. > >> > >> 73 > >> John, W3ML > > >
RE: [Repeater-Builder] Strange Problem
I have seen a bad deviation pot cause the sort of problem you describe. Eric Lowell Eastern Maine Electronics Inc. 48 Loon Road Wesley ME 04686 eme@starband.net www.satnetmaine.com 207-210-7469 --- On Tue, 10/6/09, Vernon Densler wrote: From: Vernon Densler Subject: RE: [Repeater-Builder] Strange Problem To: Repeater-Builder@yahoogroups.com Date: Tuesday, October 6, 2009, 11:13 AM No joy. It’s still dropping out the audio. From: Repeater-Builder@ yahoogroups. com [mailto:Repeater- buil...@yahoogro ups.com] On Behalf Of Doug Bade Sent: Tuesday, October 06, 2009 9:53 AM To: Repeater-Builder@ yahoogroups. com Subject: RE: [Repeater-Builder] Strange Problem Mastr II/ Exec II transmitters can have ~5vdc on mic high, this is the bias for the amplifier in a normal microphone. If you do not have a capacitor in series to the computer interface or the computer interface has a polarized cap that is in the wrong direction, strange things like this can happen. Verify DC potential on both sides of any interface components.. . as capacitors can work backwards for a while but eventually stop passing when incorrectly polarized... It is always better to use non polarized capacitors in this audio path but they do usually cost a little more and sometimes are harder to acquire... Doug KD8B At 09:37 AM 10/6/2009, you wrote: The old controller was actually having problems opening up when the radio went into receive. So it's a bit different. I am trying to get my hands on another controller to see if that helps. Also may try putting the old controller back in to see if it starts working any better. -Original Message- From: Repeater-Builder@ yahoogroups. com [ mailto:Repeater- buil...@yahoogro ups.com] On Behalf Of Joe Sent: Tuesday, October 06, 2009 9:20 AM To: Repeater-Builder@ yahoogroups. com Subject: Re: [Repeater-Builder] Strange Problem Are you experiencing the exactly same problem with Echostation as you had with the old controller? If so, it's probably something wrong in the MastrII radio. I would troubleshoot this by taking the covers off of everything so that I can access several points in the transmit audio chain. I'd take some audio readings with the repeater working correctly, then wait until the trouble happens and see what changed. At least this will point you to the area where the trouble is occurring. As I wild guess, I would suspect a bad capacitor. With MastrII boards being so easy to get, I would probably just change out the board. 73, Joe, K1ike Vernon Densler wrote: > > > Here is my setup. I have a MastrII mobile which was converted a long > time ago. I was having trouble with my controller a while back and > went with Echostation. As far as I know everything was working fine > for a while then over the past few weeks I started having this strange > problem. After being on for about 15 or 20 minutes my audio level on > the transmit side will drop really low. Most of the time if I unplug > the cable going from the computer to the transmit side of the radio or > turn the repeater off then on again it will come back to normal for > about 20 minutes again. > > I tried putting my audio mixer between the computer and the transmit > on the radio and it didn't fix the problem, however using headphones > on the mixer I could tell that the audio level from the computer never > dropped. Which would lead me to believe it's something in the radio. > > I also tried disconnecting the ground line from the TX side and that > didn't help. Going to try both the TX and RX side next so that there > are no grounds going to the sound card. Besides that is there anything > else that could be causing this? > > Thanks, > > Vern > > KI4ONW > > > > - - -- Yahoo! Groups Links
Re: [Repeater-Builder] Radio for repeater use
Mastr IIs are pretty good radios in repeater service. Is yours a converted mobile or a base station with the big heatsink? G7s have been problematic for repeater service in New Englands climate, not sure about yours. Not sure about the power increase on warmup. If you have a spectrum analyser, does it go spurious? I have seen that, usually cured by a by the book alignment. I'd sooner look at the duplexer, RX preamp (if used), cables, and the aforementioned antenna, before swapping out the radio. There are lots of good alternatives for VHF repeater radios, depends what you can find, and your budget. I much prefer commercial equipment over ham rigs. Good Luck de W1EL Eric Lowell Eastern Maine Electronics Inc. 48 Loon Road Wesley ME 04686 eme@starband.net www.satnetmaine.com --- On Sun, 10/4/09, W3ML wrote: From: W3ML Subject: [Repeater-Builder] Radio for repeater use To: Repeater-Builder@yahoogroups.com Date: Sunday, October 4, 2009, 2:24 PM Hi All, I am looking at the changing radios on our repeater because of the problems we are having. We are using a GE Mastr II into a 6 can duplexer and up via 1/2 hardline to a G7-144. However, we can not raise the power above 10 watts before de-sense sets in. Also the radio will climb in power level as it gets hot. I set it at 5 watts out and by the end of a half hour net it is up to 12 watts out. In my opinion this is not right. What radio would be good for a 2 meter repeater. Thanks and 73 John, W3ML
Re: [Repeater-Builder] Radio for repeater use
Mastr IIs are pretty good radios in repeater service. Is yours a converted mobile or a base station with the big heatsink? G7s have been problematic for repeater service in New Englands climate, not sure about yours. Not sure about the power increase on warmup. If you have a spectrum analyser, does it go spurious? I have seen that, usually cured by a by the book alignment. I'd sooner look at the duplexer, RX preamp (if used), cables, and the aforementioned antenna, before swapping out the radio. There are lots of good alternatives for VHF repeater radios, depends what you can find, and your budget. I much prefer commercial equipment over ham rigs. Good Luck de W1EL Eric Lowell Eastern Maine Electronics Inc. 48 Loon Road Wesley ME 04686 eme@starband.net www.satnetmaine.com --- On Sun, 10/4/09, W3ML wrote: From: W3ML Subject: [Repeater-Builder] Radio for repeater use To: Repeater-Builder@yahoogroups.com Date: Sunday, October 4, 2009, 2:24 PM Hi All, I am looking at the changing radios on our repeater because of the problems we are having. We are using a GE Mastr II into a 6 can duplexer and up via 1/2 hardline to a G7-144. However, we can not raise the power above 10 watts before de-sense sets in. Also the radio will climb in power level as it gets hot. I set it at 5 watts out and by the end of a half hour net it is up to 12 watts out. In my opinion this is not right. What radio would be good for a 2 meter repeater. Thanks and 73 John, W3ML
Re: [Repeater-Builder] Anybody have some REALLY old Moto manuals?
My 1965 vintage UHF T-power book says that there are 26 tones from 82.5 to 192.8, but doesn't show a list. I don't have a twin Vee book or anything earlier, sorry. Best regards, W1EL Eric Lowell Eastern Maine Electronics Inc. 48 Loon Road Wesley ME 04686 eme@starband.net www.satnetmaine.com --- On Thu, 9/17/09, Mike Morris WA6ILQ wrote: From: Mike Morris WA6ILQ Subject: [Repeater-Builder] Anybody have some REALLY old Moto manuals? To: Repeater-Builder@yahoogroups.com Date: Thursday, September 17, 2009, 9:09 PM 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
Re: [Repeater-Builder] Re: coax cable
All due respect, but in nearly 30 years of maintaining paging systems from 40-950 mHz, I've never heard this, or been instructed by an antenna vendor to do so. LDF4-50 jumper from the feedline to the antenna was the standard, purely because we used feedlines of 1 1/4 and 1 5/8 routinely and that doesnt bend sharp enough to get to connectors. Humor mode on: Maybe that why paging has largely gone by the wayside ;mode off We never used superflex outside though, apparently some of the jackets were not rated for sun exposure. Best regards de W1EL Eric Lowell Eastern Maine Electronics Inc. 48 Loon Road Wesley ME 04686 eme@starband.net www.satnetmaine.com --- On Sun, 9/13/09, MCH wrote: From: MCH Subject: Re: [Repeater-Builder] Re: coax cable To: Repeater-Builder@yahoogroups.com Date: Sunday, September 13, 2009, 3:36 PM Hardline/Heliax should *never* be connected directly to an antenna. ALWAYS use a jumper. Joe M. Joe wrote: > I would agree on 1/2" being a good alternative. The 1/2" would only > require a connector at both ends, eliminating 4 connectors that would be > used on the jumpers when using 7/8" line. After eliminating the loss > (and potential problems) of the 4 connectors, 1/2" would come close to > matching the 7/8" in line loss. > > Joe > > larynl2 wrote: >> If I may argue Eric's good advice here, for a 100' or so run, I would not be >> bothered by using 1/2" Heliax. For less than 1db more loss at 70cm, it's >> much cheeper and easier to run... >> >> > > > > - - -- > > > > Yahoo! Groups Links > > > >
Re: [Repeater-Builder] Rebuilding a Stationmaster
there is (was) a special top support made, tubing with an insulated hole on the end that goes down over the top and then crossover plated to the tower. For less demanding installations I've used a piece of schedule 40 PVC drilled to fit over the antenna and crossover plated to the tower. Not pretty but seems to work. "this is only temporary, unless of course, it works" Red Green 73 de W1EL Eric Lowell Eastern Maine Electronics Inc. 48 Loon Road Wesley ME 04686 eme@starband.net www.satnetmaine.com --- On Wed, 9/9/09, Don Kupferschmidt wrote: From: Don Kupferschmidt Subject: Re: [Repeater-Builder] Rebuilding a Stationmaster To: Repeater-Builder@yahoogroups.com Date: Wednesday, September 9, 2009, 2:00 PM I thought the repeater builder web site had a specific article on how to take apart that antenna and fix it by soldering wires to the body of the antenna - but I've been all over the site and can't seem to find that article. Can anyone provide a link to it? Also, I have a super stationmaster sitting in my garage with the same issue.. I'd like to fix it and put it back up on the tower. It was mounted on the top of the tower, with no other support. This time, when I put it back up, I'm going to mount it on the side of the tower. Are there generic side arms that can be used from anyone, or must I order something specific to the stationmaster? TIA, Don, KD9PT - Original Message - From: Eric Lowell To: Repeater-Builder@ yahoogroups. com Sent: Wednesday, September 09, 2009 4:35 AM Subject: Re: [Repeater-Builder] Rebuilding a Stationmaster It has been a long time, butI remember that about where the clamp for the ground radials is there are 3? large screws. Remove the the screws and the whole antenna will slide out of the radome by pulling on the RF connector. The black stuff bonds the aluminum mounting sleeve to the fiberglas and you don't have to fiddle with that part. as always - YMMV Best Regards, Eric W1EL Eric Lowell Eastern Maine Electronics Inc. 48 Loon Road Wesley ME 04686 eme@starband. net www.satnetmaine. com --- On Wed, 9/9/09, hbbcara wrote: From: hbbcara Subject: [Repeater-Builder] Rebuilding a Stationmaster To: Repeater-Builder@ yahoogroups. com Date: Wednesday, September 9, 2009, 1:01 AM Hi all, The repeater-builder website mentions rebuilding a Stationmaster that has developed noise by taking it apart and resoldering the sections. I have a Stationmaster that has developed that noise so I brought it down the hill. The replacement antenna cured the noise, but it's not the same class of antenna so my coverage area is not what it was nor will that antenna survive the winter. Now comes the project of actually rebuilding the broken antenna. Upon starting to take it apart though, a big question came up. Are there Stationmaster models that can and models that can't be rebuilt? I don't have the model designator of mine. The antenna predates my association with the site (in the context of maintaining it anyway) and the label is largely faded away. I can read "Phelps Dodge" and "Super Stationmaster" but that's about it for the label. The antenna is for 2 meters and is 21 feet, 6.75 inches long from the bottom of the metal base to the top of the metal topcap. The thing that worries me as far as being able to take it apart is that there seems to be something like epoxy between the radome and the metal base. There's a black substance at the junction of the radome to the base and upon taking the three screws out of the side of the metal base I can see the layer of metal, the layer of the black stuff, the layer of the radome and then the inner metal that the screw goes into. Can someone who's taken these apart tell me if that black substance is indeed bonding the parts together and I'm stuck looking for a new antenna, or with all the screws out and just a little more force will it indeed come apart? Thanks for any pointers and 73 rj kb6ytd
Re: [Repeater-Builder] Rebuilding a Stationmaster
It has been a long time, butI remember that about where the clamp for the ground radials is there are 3? large screws. Remove the the screws and the whole antenna will slide out of the radome by pulling on the RF connector. The black stuff bonds the aluminum mounting sleeve to the fiberglas and you don't have to fiddle with that part. as always - YMMV Best Regards, Eric W1EL Eric Lowell Eastern Maine Electronics Inc. 48 Loon Road Wesley ME 04686 eme@starband.net www.satnetmaine.com --- On Wed, 9/9/09, hbbcara wrote: From: hbbcara Subject: [Repeater-Builder] Rebuilding a Stationmaster To: Repeater-Builder@yahoogroups.com Date: Wednesday, September 9, 2009, 1:01 AM Hi all, The repeater-builder website mentions rebuilding a Stationmaster that has developed noise by taking it apart and resoldering the sections. I have a Stationmaster that has developed that noise so I brought it down the hill. The replacement antenna cured the noise, but it's not the same class of antenna so my coverage area is not what it was nor will that antenna survive the winter. Now comes the project of actually rebuilding the broken antenna. Upon starting to take it apart though, a big question came up. Are there Stationmaster models that can and models that can't be rebuilt? I don't have the model designator of mine. The antenna predates my association with the site (in the context of maintaining it anyway) and the label is largely faded away. I can read "Phelps Dodge" and "Super Stationmaster" but that's about it for the label. The antenna is for 2 meters and is 21 feet, 6.75 inches long from the bottom of the metal base to the top of the metal topcap. The thing that worries me as far as being able to take it apart is that there seems to be something like epoxy between the radome and the metal base. There's a black substance at the junction of the radome to the base and upon taking the three screws out of the side of the metal base I can see the layer of metal, the layer of the black stuff, the layer of the radome and then the inner metal that the screw goes into. Can someone who's taken these apart tell me if that black substance is indeed bonding the parts together and I'm stuck looking for a new antenna, or with all the screws out and just a little more force will it indeed come apart? Thanks for any pointers and 73 rj kb6ytd
Re: [Repeater-Builder] 2M Vertical Dipoles
Cushcraft used to have that antenna. Since discontinued. Regards de W1EL Eric Lowell Eastern Maine Electronics Inc. 48 Loon Road Wesley ME 04686 eme@starband.net www.satnetmaine.com --- On Sat, 8/8/09, Doug Rehman wrote: From: Doug Rehman Subject: [Repeater-Builder] 2M Vertical Dipoles To: Repeater-Builder@yahoogroups.com Date: Saturday, August 8, 2009, 10:11 PM I remember seeing a vertical dipole from one on the amateur antenna manufacturers that was designed to bolt onto your mast or tower leg. I think it might have come in a kit of 2 or 4. I thought it was Cushcraft, but I couldn't find it. Does anyone have any idea what antenna I thought I saw? Thanks, Doug K4AC
RE: [Repeater-Builder] how do I turn off email notice?
Yahoo seems to take several days to execute changes. I changed an e-mail address for one group and it took nearly a week. I had about given up when the emails began going to the new address. GL de W1EL Eric Lowell Eastern Maine Electronics Inc. 48 Loon Road Wesley ME 04686 eme@starband.net www.satnetmaine.com --- On Wed, 7/29/09, Mike Besemer (WM4B) wrote: From: Mike Besemer (WM4B) Subject: RE: [Repeater-Builder] how do I turn off email notice? To: Repeater-Builder@yahoogroups.com Date: Wednesday, July 29, 2009, 9:06 PM Ron, I think Yahoo is having issues. I quit a group 2 days ago and I’m still getting emails. I even rejoined and quit again and it didn’t help. 73, Mike WM4B From: Repeater-Builder@ yahoogroups. com [mailto:Repeater- buil...@yahoogro ups.com] On Behalf Of ron Sent: Wednesday, July 29, 2009 6:51 PM To: Repeater-Builder@ yahoogroups. com Subject: [Repeater-Builder] how do I turn off email notice? I selected "web only" so I don't get my email box filled up every day with posts. How do I turn it off?
[Repeater-Builder] RC-100 remote base hardware selection
Greetings, I am considering adding a 2m remote base to my RC-100 controlled UHF machine. Looking for recommendations of specific radios to use, along with any to avoid. I would like to use the BCD frequency agility of the controller. Thanks and best regards de W1EL Eric Lowell Eastern Maine Electronics Inc. 48 Loon Road Wesley ME 04686 eme@starband.net www.satnetmaine.com 207-210-7469
Re: [Repeater-Builder] Need circuit -- COS Sense & AF Amplify
I have a few old Radio Shack "engineer handbooks" that have a wealth of these circuits, 'cause I can never remember them. However, they are packed away still after moving. This site : http://www.kpsec.freeuk.com/trancirc.htm Seems to have mosteverything you'll need to invert the COS. Audio is another issue, The IC solution is probably best, less likely to build in distortion than with perfboard transistor circuit Eric Lowell Eastern Maine Electronics Inc. 48 Loon Road Wesley ME 04686 eme@starband.net www.satnetmaine.com 207-210-7469 --- On Mon, 7/13/09, John Transue wrote: From: John Transue Subject: [Repeater-Builder] Need circuit -- COS Sense & AF Amplify [1 Attachment] To: Repeater-Builder@yahoogroups.com Date: Monday, July 13, 2009, 9:42 AM [Attachment(s) from John Transue included below] I need to interface a link receiver (Icom F221S) with an ACC RC-850. This presents two problems. First, the Icom receiver uses active low COS, and the RC-850 doesn't seem to have a means to select the sense of a link receiver. The repeater receiver (Midland BaseTech II) uses active high COS. Second, the discriminator audio output from the Icom is about 0.6 Vp-p, but the RC-850 hardware manual says the audio input should be between 1 and 5 Vp-p. I have posted the first problem to the ACC group but have received no reply. Yes, the ACC manual says to insert a 47K resistor in a specified place to increase sensitivity. I can do this but it requires I take the repeater out of operation for a day or so. It occurs to me that a circuit to reverse the sense of the COS might be available from this group. Also, a simple amplifier circuit could solve the AF level problem. I know this is all elementary, but I am not competent to design these simple circuits. I will gladly build them. I would appreciate any help you can provide on the design. Thanks. John Transue AF4PD
Re: [Repeater-Builder] Re: Echoing
Thanks for the clarification. I'd like to assume that your duplexer and cabling have been tuned up with a spectrum analyser/tracking generator and look good on the scope. I have seen cavities get noisy where finger stock rides on tuning rods, but this issue doesnt sound like that. It has been postulated that you might have a TX spur that comes up and causes the problem. I tend to lean in that direction. Since the problem is intermittent, you are going to have to go over everything until the problem goes away. If your radio is at a commercial site, you may find another transmitter involved. In any case, it won't hurt to look at the duplexer, but I wouldn't think that was the issue, unless it has given problems before. Good Luck with it! Keep us posted. Regards de W1EL Eric Lowell Eastern Maine Electronics Inc. 48 Loon Road Wesley ME 04686 eme@starband.net www.satnetmaine.com 207-210-7469 --- On Mon, 6/29/09, Michael J.Talkington wrote: From: Michael J.Talkington Subject: [Repeater-Builder] Re: Echoing To: Repeater-Builder@yahoogroups.com Date: Monday, June 29, 2009, 3:45 PM 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@ yahoogroups. com, Eric Lowell 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 wrote: > > > From: Michael J.Talkington > Subject: [Repeater-Builder] Echoing > To: Repeater-Builder@ 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] 432 converter
Charlie, I have a completed one, along with the TX converter and a 10w, (might be 20) amp. Do you need info or are you looking to purchase? Regards, de W1EL Eric Lowell Eastern Maine Electronics Inc. 48 Loon Road Wesley ME 04686 eme@starband.net www.satnetmaine.com 207-210-7469 --- On Mon, 6/29/09, CL in NC wrote: From: CL in NC Subject: [Repeater-Builder] 432 converter To: Repeater-Builder@yahoogroups.com Date: Monday, June 29, 2009, 9:03 AM Can't remember if I asked this here, but still looking. Does anybody have a Hamtronics 440 receiving converter, dead or alive, built or still in kit form laying around? Please contact me at w4...@arrl.net Thanks. Charlie in NC
Re: [Repeater-Builder] Echoing
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@starband.net www.satnetmaine.com 207-210-7469 --- On Mon, 6/29/09, Michael J.Talkington wrote: From: Michael J.Talkington Subject: [Repeater-Builder] Echoing To: Repeater-Builder@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] Re: GE Mastr II Fuzzy audio
What frequency are you on? I'll need to look at a schematic to come up with much. 73 de Eric Eric Lowell Eastern Maine Electronics Inc. 48 Loon Road Wesley ME 04686 eme@starband.net www.satnetmaine.com 207-210-7469 --- On Fri, 6/26/09, w4sef wrote: From: w4sef Subject: [Repeater-Builder] Re: GE Mastr II Fuzzy audio To: Repeater-Builder@yahoogroups.com Date: Friday, June 26, 2009, 6:14 PM Hi Lowell, Near the front end helical section of the reciever there are two crystals and a trimmer near them Also, 3 coils that need alignment. There are the ones I am talking about. I have a feeling that these are the ones that are not aligned properly. The reciever is very sensitive-about. 12 for 12 DB Sinad quieting but the audio, especially on a weak signal is distorted. Thanks for any help. Steve - In Repeater-Builder@ yahoogroups. com, Eric Lowell wrote: > > I looked through my notes on the UHF version and I did'nt see anything tricky > there. What do you mean by specialized equipment? > > 73 de W1EL > > Eric Lowell > Eastern Maine Electronics Inc. > 48 Loon Road > Wesley ME 04686 > eme@... > www.satnetmaine. com > 207-210-7469 > > --- On Thu, 6/25/09, Eric Lowell wrote: > > > From: Eric Lowell > Subject: Re: [Repeater-Builder] GE Mastr II Fuzzy audio > To: Repeater-Builder@ yahoogroups. com > Date: Thursday, June 25, 2009, 9:31 PM > > > > > > > > > > > > > > Seems like I used to have to inject the IF freq and tweek that up first. > > UHF or VHF? I'll look at my manuals tomorrow. > > E > > Eric Lowell > Eastern Maine Electronics Inc. > 48 Loon Road > Wesley ME 04686 > eme@starband. net > www.satnetmaine. com > 207-210-7469 > > --- On Thu, 6/25/09, w4sef wrote: > > > From: w4sef > Subject: [Repeater-Builder] GE Mastr II Fuzzy audio > To: Repeater-Builder@ yahoogroups. com > Date: Thursday, June 25, 2009, 9:08 PM > > > > > Hi all, > > My spare Mastr II reciever audio is best decribed as "fuzzy/slightly > distorted. > It seems worse on a weak noisy signal. I have checked the crystal frequency > and > it is dead on. I went thru the reciever alignment and this reciever is really > hot as far as quieting goes. I suspect the problem is misalignment in the 3 > coils and trimmer cap near the helical resonator section. According to what I > have read in the manual it takes some specialized equipment that I don't have. > Can anyone advise me as to a good way to check this alignment? I am new at the > GE game so I appeciate any advice. > > Thanks > Steve W4SEF >
Re: [Repeater-Builder] GE Mastr II Fuzzy audio
I looked through my notes on the UHF version and I did'nt see anything tricky there. What do you mean by specialized equipment? 73 de W1EL Eric Lowell Eastern Maine Electronics Inc. 48 Loon Road Wesley ME 04686 eme@starband.net www.satnetmaine.com 207-210-7469 --- On Thu, 6/25/09, Eric Lowell wrote: From: Eric Lowell Subject: Re: [Repeater-Builder] GE Mastr II Fuzzy audio To: Repeater-Builder@yahoogroups.com Date: Thursday, June 25, 2009, 9:31 PM Seems like I used to have to inject the IF freq and tweek that up first. UHF or VHF? I'll look at my manuals tomorrow. E Eric Lowell Eastern Maine Electronics Inc. 48 Loon Road Wesley ME 04686 eme@starband. net www.satnetmaine. com 207-210-7469 --- On Thu, 6/25/09, w4sef wrote: From: w4sef Subject: [Repeater-Builder] GE Mastr II Fuzzy audio To: Repeater-Builder@ yahoogroups. com Date: Thursday, June 25, 2009, 9:08 PM Hi all, My spare Mastr II reciever audio is best decribed as "fuzzy/slightly distorted. It seems worse on a weak noisy signal. I have checked the crystal frequency and it is dead on. I went thru the reciever alignment and this reciever is really hot as far as quieting goes. I suspect the problem is misalignment in the 3 coils and trimmer cap near the helical resonator section. According to what I have read in the manual it takes some specialized equipment that I don't have. Can anyone advise me as to a good way to check this alignment? I am new at the GE game so I appeciate any advice. Thanks Steve W4SEF
Re: [Repeater-Builder] GE Mastr II Fuzzy audio
Seems like I used to have to inject the IF freq and tweek that up first. UHF or VHF? I'll look at my manuals tomorrow. E Eric Lowell Eastern Maine Electronics Inc. 48 Loon Road Wesley ME 04686 eme@starband.net www.satnetmaine.com 207-210-7469 --- On Thu, 6/25/09, w4sef wrote: From: w4sef Subject: [Repeater-Builder] GE Mastr II Fuzzy audio To: Repeater-Builder@yahoogroups.com Date: Thursday, June 25, 2009, 9:08 PM Hi all, My spare Mastr II reciever audio is best decribed as "fuzzy/slightly distorted. It seems worse on a weak noisy signal. I have checked the crystal frequency and it is dead on. I went thru the reciever alignment and this reciever is really hot as far as quieting goes. I suspect the problem is misalignment in the 3 coils and trimmer cap near the helical resonator section. According to what I have read in the manual it takes some specialized equipment that I don't have. Can anyone advise me as to a good way to check this alignment? I am new at the GE game so I appeciate any advice. Thanks Steve W4SEF
Re: [Repeater-Builder] MastrII Repeater Issue
Thunderstorm = shorted semiconductor junction (sometimes). Might not be completely shorted either. I'd start looking at the repeater control board. hope you have an extender card. Ran a bunch of MII repeaters years ago and we ended up with PolyPhaser lightning protection devices on every I/O; RF, power, telephone,etc. Solved lots of post T-storm calls. As always- Best Regards and YMMV! Eric Lowell Eastern Maine Electronics Inc. 48 Loon Road Wesley ME 04686 eme@starband.net www.satnetmaine.com 207-210-7469 --- On Thu, 6/25/09, r_s_s_i wrote: From: r_s_s_i Subject: [Repeater-Builder] MastrII Repeater Issue To: Repeater-Builder@yahoogroups.com Date: Thursday, June 25, 2009, 4:58 PM Good day… Looking for some advice. I am using a UHF MastrII repeater as an extra receive site that is outside mounted in an outdoor GE cabinet. The receiver is 449.4500 and CG 114.8 on a Stationmaster antenna at 215 feet, and transmit out is 420 at 10 watts into a yagi at 50 feet. I am using ½" Andrew heliax for both antennas. The antennas are on a FM digital broadcast tower on 106.3 MHz transmitting around 3kW of power (if my memory is correct) antenna at 400 feet. This site has been in service for a couple of months, and has worked flawlessly. After a thunderstorm went through Friday night with some heavy rain the repeater started keying up on its own as if it was being kerchunked. It acts like it is hearing an input signal to repeat, but at times the transmit relay just clatters and never actually drives the PA enough to reach to the main site. It almost acts like the squelch setting is just a tad too low causing the clatter, however I have found this is not the case. On a couple of occasions the repeater just keys and stays keyed for a second or two. I checked using an IFR monitor the input frequency to see if something was being heard and nothing was found when this clattering occurs. I also removed the receive antenna to see if something was being heard locally and the issue occurred while the antenna was off. The kerchunking occurs even if the CG board (factory dip switch style) is in or out. This repeater is very basic; I am using the GE factory repeater control card, repeater audio, and 10-volt regulator cards. Voltage was checked from the factory power supply to have input of 121.8 VAC with output at 14.9 VDC, and 10.04 VDC from the 10-volt regulator card. At first I was suspecting a possible problem with the delay timer on the repeater control card, however it is set to drop as soon as carrier received signal drops. I traced the RUS voltage at several different locations and it seems to be acting, as it should like it is hearing a signal. I had some spare parts along so I tried a couple of things with no change or correction to the problem. A different CG board (dip switch style) was installed, no change, even tried a different PL. A spare receiver was installed, no change. 10-volt regulator was swapped out, no change. Tried adjusting power level on PA, no change. We used a site master to check the feed lines, both antennas and everything looks good. Everything in the cabinet is dry with no sign of water. Has anyone encountered a similar problem? I don't see anything from the FM station on Spectrum Analyzer, but could it be interference? Anyone have experience with radio station sites? I am going to pull the unit and bring it home for a few days to see what happens. Someone suggested as a wild guess, an intermittent electrolytic capacitor. Ideas?
Re: [Repeater-Builder] Re: Completly Stumped on Noise (UHF Repeater)
It has been a long time, but I used to put a pad (around 6dB?) in front of the receiver, then see if the noise still comes through. If you still hear it then it is generated external to the RX. if it goes away, then your Rx is getting overloaded. If you have an RX preamp, have you tried it without? Also, you used to be able to get small clip-on ferrite chokes at Radio Shack, A bunch of those on the cat-5 audio/control cableing might help clean that up. Last bunch I got came from AllElectronics. YMMV!! Good Luck, Eric Eric Lowell Eastern Maine Electronics Inc. 48 Loon Road Wesley ME 04686 eme@starband.net www.satnetmaine.com 207-210-7469 --- On Tue, 6/23/09, agrimm0034 wrote: From: agrimm0034 Subject: [Repeater-Builder] Re: Completly Stumped on Noise (UHF Repeater) To: Repeater-Builder@yahoogroups.com Date: Tuesday, June 23, 2009, 3:56 PM Yes here is the PD signal frequency for there repeater. It receives on 465.4500 and Transmits on 460.4500 TPL 6A My repeater operates on 467.600 and 462.600 DPL 054 --- In Repeater-Builder@ yahoogroups. com, "Nate Duehr" wrote: > > Hang in there with all the "quizzes" -- we're all attempting to p > iece together a puzzle we don't have all the pieces to here. > > Do you know what frequency the PD signal you're hearing is on? > -- > Nate Duehr > n...@... > > > On Tue, 23 Jun 2009 15:10 +, "agrimm0034" > wrote: > > The receive radio has a 20 ft piece of RG-58 Belden and the TX > radio has 40 ft of LMR 400. After I had already purchased and > installed the LMR braid cable I then learned to my knowledge this > was not recomended for duplex use and it could cause noise and > other problems but there is no LMR on the receive end of the > radio and it still does it when the TX radio is turned off. >
