Re: [Repeater-Builder] Filters on Receive Side, how do I know if they are working?
Thanks Bob, The receiver is the Mastr ER41 series receiver. My receive is at 146.925 and the other repeater that is about 50 miles away receives at 146.310. Generally we don't have a problem, and did not after I put the GE receiver in, until I put the preamp on. Before the preamp was installed, I could key up with 250 watts on 146.310 and never key up the repeater, both just feet away from each other. I will try the 10 db pad and see if that takes care of it without degrading the receive senstivity. Thanks for the tip. Mathew - Original Message - From: Bob Dengler [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Monday, January 10, 2005 10:43 AM Subject: Re: [Repeater-Builder] Filters on Receive Side, how do I know if they are working? At 1/9/2005 10:24 PM, you wrote: Mathew, When considering RF preamp gain, more is not always better. I'm not familiar with the ARR preamp, but if it is a GaAsFET amplifier with 17 dB or so of gain, and your bandpass cavities have 1.5 dB of insertion loss, I would put either a 6 dB or a 10 dB coaxial attenuator on the output of the preamp. A net gain of 6 to 10 dB is usually enough to improve sensitivity without overloading the existing RF amplifier or mixer stages. If you're using a G.E. Mastr (which one?) RX without a preamp, the ARR preamp is not going to overload the G.E.'s front-end. Adding a 10 dB pad to the pramp output would knock your total gain ahead of the G.E. RX down to 5.5 dB. OTOH if we're talking VHF you shouldn't need much gain ahead of the G.E. RX. If we were talking UHF I'd say leave the pad out. You didn't mention which G.E. RX you're using (MASTR Pro, II, Exec??)? Anything other than a Mastr II will be a bit wide for 15 kHz spacing. I know in the end the 9 kHz deviated signal is the culprit, but if you weren't getting adjacent-channel interference before it wouldn't take much of an improvement in IF selectivity to lose the interference while keeping the improved RX coverage. Bob NO6B Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] static buster
When you drill into that brass cap, what about weather proofing at that point?? James Kevin Custer wrote: For commercial antennas that have a brass cap or rod sticking out the top of the antenna, you simply drill and tap for 4-40 threads and thread the SB into the hole. I really need to take a more current photo and place it on the site. The current SB has a shorter threaded stud and is all black in color. Here is detailed mounting instructions: http://www.repeater-builder.com/pdf/staticbustermounting.pdf Kevin skipp025 wrote: Kevin, Would it be possible to ask you to describe how the Static Buster mounts to the antenna and or antenna tower? thanks skipp Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/ Yahoo! Groups Links To visit your group on the web, go to:http://groups.yahoo.com/group/Repeater-Builder/ To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
Re: [Repeater-Builder] Filters on Receive Side, how do I know if they are working?
Mathew Quaife wrote: The receiver is the Mastr ER41 series receiver. That would be a MASTR Progress Line, Professional Series, or more commonly called MASTR PRO. Kevin Custer Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] static buster
You don't drill completely through the cap, just deep enough to fully tap for the depth of the stud which is about 1/4 inch on the current model. Kevin James wrote: When you drill into that brass cap, what about weather proofing at that point?? James Kevin Custer wrote: For commercial antennas that have a brass cap or rod sticking out the top of the antenna, you simply drill and tap for 4-40 threads and thread the SB into the hole. I really need to take a more current photo and place it on the site. The current SB has a shorter threaded stud and is all black in color. Here is detailed mounting instructions: http://www.repeater-builder.com/pdf/staticbustermounting.pdf Kevin Yahoo! Groups Links To visit your group on the web, go to:http://groups.yahoo.com/group/Repeater-Builder/ To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
[Repeater-Builder] TKR820 (tkr-720) COR logic (pin 13) information wanted.
Hello there, Anyone have information to configure the COR output logic on the Kenwood TKR820 Repeater to ctcss only? I'd like to make pin 13 (COR) of the accessory connector change states with a valid received ctcss tone. As received, accessory pin 13 (COR) changes state with carrier squelch activity. This tidbit of knowledge seems to be a rather elusive animal. Maybe one of you has done this already? Thanks in advance for your reply. cheers, skipp skipp025 at yahoo.com Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] TKR820 (tkr-720) COR logic (pin13)informationwanted.
Looks that you have an old repeater, the new ones have that pin called TOR wich is what you want, if this is the case there is a small square island in the controller board near the IC11 ( pin 9 ), this change state when there is a valid "PL" received, maybe you will need a buffer for what you need. hope this helps. Juan - Original Message - From: skipp025 To: Repeater-Builder@yahoogroups.com Sent: Monday, January 10, 2005 6:27 PM Subject: [Repeater-Builder] TKR820 (tkr-720) COR logic (pin 13)informationwanted. Hello there, Anyone have information to configure the COR output logic on the Kenwood TKR820 Repeater to ctcss only? I'd like to make pin 13 (COR) of the accessory connector change states with a valid received ctcss tone. As received, accessory pin 13 (COR) changes state with carrier squelch activity. This tidbit of knowledge seems to be a rather elusive animal. Maybe one of you has done this already? Thanks in advance for your reply.cheers, skipp skipp025 at yahoo.com Yahoo! Groups Links* To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/* To unsubscribe from this group, send an email to: [EMAIL PROTECTED]* Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/ Yahoo! Groups Links To visit your group on the web, go to:http://groups.yahoo.com/group/Repeater-Builder/ To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
Re: [Repeater-Builder] Micor Base Station Battery Backup Circuit
Those Motorola Power supplies that have the battery back-up feature are really cool, unfortunately, they are also kind of rare and expensive (unless you luck out at the swap meet or on e-bay). A friend of mine and I designed a very simple circuit to modify the Astron 20A Power supplies to do this job. Obviously this could be done on any power supply but the Astron 20A is common and inexpensive and they leave enough room to put this all inside easily. The first thing you will need is an A.C. operated relay. Radio shack has one that we chose simply because they are cheap, $8.00 and the contacts are rated high enough to handle the 20 Amps. It is RS P/N 275-0217. The contacts are rated for 10 Amps but since this is a double throw type, both throws can be tied together. I drilled another hole in the rear of the Astron to mount another binding post for the battery connection. The relay coil is connected directly to AC power coming in, the contacts are wired to the 13.8 VDC output wire so that when the relay is energized, the power is routed though the relay from the power supply to the output binding post, the output binding post being wired to the throws of the relay. When AC power is lost the relay deenergizes and these contacts of the relay are wired to the backup battery. That takes care of isolating the battery from the power supply, the only thing left is a simple charging circuit. To accomplish this, an 8 Ohm, 25 Watt resistor from the relay throws to the battery contacts was added. This only allows for trickle charging, but as the battery voltage approaches the supply voltage, the current self regulates to almost nothing. Also, since AC power is present 99.9% of the time trickle charging in this way is not a problem. This does the job nicely. We have done this mod to 2 different repeater systems with excellent results, and no failures of the backup system. Not as easy as buying a power supply ready for the task, but still easy to do and I would bet, usually less expensive. Hope that helps 73, Wade- KR7K - Original Message - From: Eric Lemmon [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Monday, January 10, 2005 6:47 PM Subject: Re: [Repeater-Builder] Micor Base Station Battery Backup Circuit Jim, The TPN1106A is one of a few Motorola MICOR power supplies that are designed to float-charge either NiCd or lead-acid batteries for emergency backup. There is an internal pot to adjust the voltage for the chemistry of the battery. When the TPN1106A power supply is used, the battery is connected directly to the same terminals that feed the PA. You cannot do this with other power supplies, because the battery may discharge back through the power supply during an outage, possibly damaging the power supply. The complete details of the TPN1106A power supply and the battery protection and alarm system are contained in a 32-page manual 6881104E92, which is still available from Motorola Parts. 73, Eric Lemmon WB6FLY Jim Cicirello wrote: Happy New Year I am looking for a print or detailed description of how Motorola hooked their Battery Backup Circuit into the Micor Base/Repeater Power Supply. I found a schematic on repeater-builder 1106.jpg, but I didn't get a good print out on my end. I remember seeing a portion of a service manual that had the circuit, but as luck would have it my manual does not have the circuit. Any help would be appreciated as always. 73 JIM KA2AJH Wellsville, New York Yahoo! Groups Links Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Micor Base Station Battery Backup Circuit
Jim, I have an original manual that shows the mod for the TPN-1106A to add the battery charger/revert circuit board. I will try to scan it and get it to you one night this week. 73, Kevin, K9HX At 10:53 AM 1/10/2005, you wrote: Happy New Year I am looking for a print or detailed description of how Motorola hooked their Battery Backup Circuit into the Micor Base/Repeater Power Supply. I found a schematic on repeater-builder 1106.jpg, but I didn't get a good print out on my end. I remember seeing a portion of a service manual that had the circuit, but as luck would have it my manual does not have the circuit. Any help would be appreciated as always. 73 JIM KA2AJH Wellsville, New York Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] GM300 TX Calibration
Hi All Vrery simple radio with few physical adjustments for one to mess up. From front to rear of radio-first is the PL / CTCSS adjustment,middle is the Squelch adjustment , last and the one to the rear is the TX max mod. Always adjust max mod before fine adjusting PL / CTCSS. Software it is hard to go wrong and self expanitary. I have other mods for repeater/ link working but I d ont think it is needed here. Regards Bradley Glen ZS5WT --- Steven Passmore [EMAIL PROTECTED] wrote: I wouldn't mind if you keep it on the list. Sounds like good information. I looked through motorola.ca myself and couldn't find anything other than some marketing pages in both english and french. Steve P. - Original Message - From: Richard W. Solomon [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Monday, January 10, 2005 2:17 PM Subject: RE: [Repeater-Builder] GM300 TX Calibration Where on the site is it ? I couldn't find it. 73, Dick, W1KSZ -Original Message- From: Warren Beaule [mailto:[EMAIL PROTECTED] Sent: Monday, January 10, 2005 2:51 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] GM300 TX Calibration It is all available free from motorola Canada in downloadable format Regards Warren VA5WDB --- wn1b8 [EMAIL PROTECTED] wrote: Greetings, Is there anyone on the list that has an understanding of the soft calibration procedures for the M120/GM300 radios that would be willing to help me? I'd prefer off list to as to not take up list bandwidth. Thanks, Scott Madison, WN1B Yahoo! Groups Links [EMAIL PROTECTED] __ Post your free ad now! http://personals.yahoo.ca Yahoo! Groups Links Yahoo! Groups Links Yahoo! Groups Links [EMAIL PROTECTED] __ Do you Yahoo!? Yahoo! Mail - now with 250MB free storage. Learn more. http://info.mail.yahoo.com/mail_250 Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: SINAD measurements
Now this is certainly correct. Tuning of a Mastr IF stage requires a SinAdder. But then if you are tuning the IF stage then it is not an otherwise functional transmitter for re-tuning which is what I was eluding to in my earlier statement. -- Original Message -- Received: Sun, 09 Jan 2005 10:11:49 AM CST From: Kevin Custer [EMAIL PROTECTED] SNIP ANY technician would be damn hard pressed to properly align a GE Mastr II I-F for least distortion by their ear alone. Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[Repeater-Builder] Micor Base Station Battery Backup Circuit
Thank you to Neil, Kevin, Wade, Eric and Marie Co. for the information and help to get me started on placing a Battery Backup on my Micor Repeater. Where else but on Repeater Builder would busy people be so kind to share their skills and knowledge. 73 JIM KA2AJH Wellsville, NY Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[Repeater-Builder] Re: TKR820 (tkr-720) COR logic (pin13)informationwanted.
Just what the doctor ordered. Thanks Juan. Su respuesta trabajada muy bien. ¿Qué estado usted vivo adentro? Tengo familia en GTO, MX Gracias otra vez mucho. skipp XE2SI [EMAIL PROTECTED] wrote: Looks that you have an old repeater, the new ones have that pin called TOR wich is what you want, if this is the case there is a small square island in the controller board near the IC11 ( pin 9 ), this change state when there is a valid PL received, maybe you will need a buffer for what you need. hope this helps. Juan - Original Message - From: skipp025 To: Repeater-Builder@yahoogroups.com Sent: Monday, January 10, 2005 6:27 PM Subject: [Repeater-Builder] TKR820 (tkr-720) COR logic (pin 13)informationwanted. Hello there, Anyone have information to configure the COR output logic on the Kenwood TKR820 Repeater to ctcss only? I'd like to make pin 13 (COR) of the accessory connector change states with a valid received ctcss tone. As received, accessory pin 13 (COR) changes state with carrier squelch activity. This tidbit of knowledge seems to be a rather elusive animal. Maybe one of you has done this already? Thanks in advance for your reply. cheers, skipp skipp025 at yahoo.com Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[Repeater-Builder] optional answer, tkr-820 tone cor question.
just a repost of another option I received on another group. It's elusive because it doesn't exist. On the repeater, since the encode/decode is on the separate board, it doesn't appear in the main radio. I don't have a book, but it sounds like you do. I think there may be a pin on the internal controller board that may do what you want. If not, you may have to set the hang time to zero and use the PTT out pin, and wire that to the back panel. I remember trying to figure that out years ago, and that was the only answer, wiring a pin from the control board to the back. Jim Barbour Transcore Hi Jim, We're both on the right track, I was planning to wire the ptt out LED as a fix, but I'm only using this repeater as a voting receiver (I don't need the tx). Even with the rf power off or near zero, it's a waste of heat to have the tx operational. The repeat function has to be enabled (front panel) to use the ptt LED. Juan answered me on the repeater builder group with: [paste] Looks that you have an old repeater, the new ones have that pin called TOR wich is what you want, if this is the case there is a small square island in the controller board near the IC11 ( pin 9 ), this change state when there is a valid PL received, maybe you will need a buffer for what you need. hope this helps. The TOR Pin is present on the Signaling Module, I'll buffer it and bring it out to the accessory jack or replace the pin 13 cos pin function internal to the unit. I'm off to the races... cheers skipp skipp025 at yahoo.com thanks to everyone who offered up an answer. Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: TKR820 (tkr-720)CORlogic(pin13)informationwanted.
Hello Skipp, I am here in Tijuana, just across the border with San Ysidro, Ca. Good it works for you. 73. Juan - Original Message - From: skipp025 To: Repeater-Builder@yahoogroups.com Sent: Tuesday, January 11, 2005 8:31 AM Subject: [Repeater-Builder] Re: TKR820 (tkr-720) CORlogic(pin13)informationwanted. Just what the doctor ordered. Thanks Juan. Su respuesta trabajada muy bien. ¿Qué estado usted vivo adentro? Tengo familia en GTO, MX Gracias otra vez mucho.skipp XE2SI [EMAIL PROTECTED]... wrote: Looks that you have an old repeater, the new ones have that pin called TOR wich is what you want, if this is the case there is a small square island in the controller board near the IC11 ( pin 9 ), this change state when there is a valid "PL" received, maybe you will need a buffer for what you need. hope this helps. Juan - Original Message - From: skipp025 To: Repeater-Builder@yahoogroups.com Sent: Monday, January 10, 2005 6:27 PM Subject: [Repeater-Builder] TKR820 (tkr-720) COR logic (pin 13)informationwanted. Hello there, Anyone have information to configure the COR output logic on the Kenwood TKR820 Repeater to ctcss only? I'd like to make pin 13 (COR) of the accessory connector change states with a valid received ctcss tone. As received, accessory pin 13 (COR) changes state with carrier squelch activity. This tidbit of knowledge seems to be a rather elusive animal. Maybe one of you has done this already? Thanks in advance for your reply. cheers, skipp skipp025 at yahoo.com Yahoo! Groups Links* To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/* To unsubscribe from this group, send an email to: [EMAIL PROTECTED]* Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/ Yahoo! Groups Links To visit your group on the web, go to:http://groups.yahoo.com/group/Repeater-Builder/ To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
Re: [Repeater-Builder] Filters on Receive Side, how do I know if they are working?
Thanks Bob, The receiver is the Mastr ER41 series receiver. My experience has been that the IFs in those receivers are a bit wide. The one I have in the garage has a 5.3 MHz 1st IF, so finding a narrower filter for it is probably next to impossible. They do use a 455 kHz 2nd IF, so in theory there should be a way to graft in a CFW455G 6-pole filter, but I've never done it. If I were to try, I'd scrap the entire detector board replace it with an MC3359 IF on-a-chip M6709 or M7716 Micor squelch IC. In your case it's probably easier to go with a Mastr II RX. They have 10 poles of IF filtering are ~37 dB down @ +/- 10 kHz. If that's not narrow enough you can replace some or all of the IF filters with the 12.5 kHz G.E. IF filters from Com-Spec (www.com-spec.com). My receive is at 146.925 and the other repeater that is about 50 miles away receives at 146.310. This is good. If all repeater TXs RXs are good properly adjusted there should be no problem. 9 kHz seems awfuly high; that exeeds the acceptance bandwidth of just about any NBFM radio made. What did you measure it with?. Maybe you should contact your frequency coordinator if the owner of the other system refuses to turn it down. Bob NO6B Actually it's not the repeater that is causing the interference, but rather a user of the system, and was measured with my CE-6030 monitor. Was hoping to avoid a war, as he is an older gentleman whom can be stubborn, and I would rather solve than fight. I'm getting ready to try the 10db pad and see if that helps any. Mathew Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[Repeater-Builder] Standard Mobile gx1500u Info needed
Can anyone tell me about these radios, if they are xtal controlled or programmable, or any other information about them. Thanks. Mathew Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] DC grounded antennas - ?
yeah I meant it stayed the same. When I made the stub, I tuned it using the MFJ-269 in resonance mode and for sure I was on the correct frequency. I think when I get home I will make another stub, but this time tune it after it's installed between the radio and antenna. ~Ben, KB9LFZ --- Jim B. [EMAIL PROTECTED] wrote: What do you mean by 'it didn't help'? Did the SWR stay the same? If so, the arrestor is bad and must be replaced. If not, you may have a bad connector or jumper somewhere. Make sure you eliminate everything else too. -- Jim Barbour WD8CHL Benjamin Naber wrote: thought the same you did, but nope didn't help Any one else? ~Ben, KB9LFZ --- Rick - VA3RZS/Charlotte - VA3CMR [EMAIL PROTECTED] wrote: I could be wrong but I would say there is a problem with the L . A .. check it out on a dummy load .. that you know is good .. I looked at mine and thay are all fine and do not move the swr up and all ... others might have a better answer for you Rick On 7 Jan 2005 at 12:01, Benjamin Naber wrote: afternoon ya'll Done a little bit of reading and playing around, what is an advantage and disadvantage of using DC gounded antennas? One thing I am curious about is why when a lightning arrestor is used with a DC grounded antenna, does the SWR go up? A while back I installed a lightning arrestor in line with my j-pole and the SWR went WAY up - something like a 3 or 4. Just recently I installed a 5/4 wave shorted stub and the same thing. In either case, why would the SWR go up? Yahoo! Groups Links [EMAIL PROTECTED] = - ~Ben, KB9LFZ Got your radio on and listening? Then KEY the radio and say that you are! LET US USE WHAT WE HAVE!! __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Filters on Receive Side, how do I know if they are working?
At 1/11/2005 10:47 AM, you wrote: This is good. If all repeater TXs RXs are good properly adjusted there should be no problem. 9 kHz seems awfuly high; that exeeds the acceptance bandwidth of just about any NBFM radio made. What did you measure it with?. Maybe you should contact your frequency coordinator if the owner of the other system refuses to turn it down. Bob NO6B Actually it's not the repeater that is causing the interference, but rather a user of the system, If the offending repeater's output is 15 kHz away from your input, then a user cannot cause adjacent-channel interference to your input RX. Sounds like the other repeater is not properly limiting its deviation, hence the wide user's signal is passed with fidelity. The fault lies in the other repeater TX not limiting the wide user's deviation. and was measured with my CE-6030 monitor. Was hoping to avoid a war, as he is an older gentleman whom can be stubborn, and I would rather solve than fight. I'm getting ready to try the 10db pad and see if that helps any. Understood, but somebody else's improperly configured repeater TX shouldn't result in your repeater's RX coverage being degraded. Bob NO6B Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Filters on Receive Side, how do I know if they are working?
Might have misexplained it actually, the user has a Kenwood Radio that has been played with prior to him getting the radio, had the deviation turned way up, when he transmits on the 146.910 repeater to their input of 146.310, he clips into my receiver at 146.325 causing the repeater to key up several times during his conversation when he speaks loud into the microphone. I even offered to adjust his radio for him, says he would like that, but won't make the attempt to bring it here to get it done. Just was hoping to eliminate it on this end, which I had with the Mastr receiver until I installed the preamp, then he came back, but the suggestion of using a pad might do the trick. He generally gets on early afternoon, so once he begins his transmissions, I will put the attenuator inline and see how far down I have to go to get rid of him then check receiver performance from that point. Mathew At 1/11/2005 10:47 AM, you wrote: This is good. If all repeater TXs RXs are good properly adjusted there should be no problem. 9 kHz seems awfuly high; that exeeds the acceptance bandwidth of just about any NBFM radio made. What did you measure it with?. Maybe you should contact your frequency coordinator if the owner of the other system refuses to turn it down. Bob NO6B Actually it's not the repeater that is causing the interference, but rather a user of the system, If the offending repeater's output is 15 kHz away from your input, then a user cannot cause adjacent-channel interference to your input RX. Sounds like the other repeater is not properly limiting its deviation, hence the wide user's signal is passed with fidelity. The fault lies in the other repeater TX not limiting the wide user's deviation. and was measured with my CE-6030 monitor. Was hoping to avoid a war, as he is an older gentleman whom can be stubborn, and I would rather solve than fight. I'm getting ready to try the 10db pad and see if that helps any. Understood, but somebody else's improperly configured repeater TX shouldn't result in your repeater's RX coverage being degraded. Bob NO6B Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Filters on Receive Side, how do I know if they are working?
At 1/11/2005 12:02 PM, you wrote: Might have misexplained it actually, the user has a Kenwood Radio that has been played with prior to him getting the radio, had the deviation turned way up, when he transmits on the 146.910 repeater to their input of 146.310, he clips into my receiver at 146.325 causing the repeater to key up several times during his conversation when he speaks loud into the microphone. Oh, OK I got it now. I even offered to adjust his radio for him, says he would like that, but won't make the attempt to bring it here to get it done. Go to his house. Buy him a beer. Etc. Yes it's more of a pain/expense, but cheap in the long run if it solves the problem. Some of the newer radios (maybe not so new if you consider the Yaesu FT-8500 new) provide for deviation adjustment via a service menu, so in those cases you don't even have to pop the radio open. Then again, maybe that's how this particular radio got played with. Just was hoping to eliminate it on this end, which I had with the Mastr receiver until I installed the preamp, then he came back, but the suggestion of using a pad might do the trick. He generally gets on early afternoon, so once he begins his transmissions, I will put the attenuator inline and see how far down I have to go to get rid of him then check receiver performance from that point. I suspect you will lose effective sensitivity. Adjacent-channel interference (ACI) on-channel noise will track together as attenuation is increased until the latter disappears into the RX front-end noise. At that point you'll probably see the ACI begin to fall but your effective sensitivity will degrade too. If you're not that concerned about how much his signal is degrading your input but don't like the keyups, consider CTCSS access, or run a tight carrier squelch use CTCSS OR COS squelch (input access mode '4' in LinkComm, S-Com MP100 controllers) so weak users equipped with CTCSS can still get in yet strong users still won't need CTCSS. Bob NO6B Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
