Re: [Repeater-Builder] 406-420 MHz Radios
joe i have a mostar 406-430 if that'll do you any good works with mike (I'm pretty sure) $50 + post (it'll ship priority) mdm ted
Re: [Repeater-Builder] 406-420 MHz Radios
Hi Ted, I wasn't looking for a 406-430 radio, were you thinking of someone else? Joe Ted Bleiman K9MDM - MDM Radio wrote: joe i have a mostar 406-430 if that'll do you any good works with mike (I'm pretty sure) $50 + post (it'll ship priority) mdm ted
Re: [Repeater-Builder] 406-420 MHz Radios
WA7JAW was asking. Chuck WB2EDV - Original Message - From: Joe k1ike_m...@snet.net To: Repeater-Builder@yahoogroups.com Sent: Monday, December 07, 2009 9:44 AM Subject: Re: [Repeater-Builder] 406-420 MHz Radios Hi Ted, I wasn't looking for a 406-430 radio, were you thinking of someone else? Joe Ted Bleiman K9MDM - MDM Radio wrote: joe i have a mostar 406-430 if that'll do you any good works with mike (I'm pretty sure) $50 + post (it'll ship priority) mdm ted
Re: [Repeater-Builder] MAxtrac Help please
w7nikw7nik wrote: Has anyone rewired the pin out on a Motorola DTMF mic model hmn3013a to a maxtrac 300 . I do not see voltage out the mic jack , this might be a problem . Any help would be great I can get different dtmf mic , but i don't know what model to get . As far as I can tell, it should just plug right in. Any Motorola with the 8-pin modular jack should be wired the same. The only difference I know of is the behavior of the mic, ie, whether the tones are sent continuously as long as you hold the button, or just a short blip when you first hit it. There are also some programmable units with memories, etc. In fact, you can take a DTMF mic from, say, a Micor/Syntor and just change the cord and it should work too. I even took a Mostar DTMF mic and re-wired it for a EFJ challenger low band (7154 I think?). Just moved the wires around in the mic head! If you don't have A+ on the jack, though, yeah, it probably won't work... Jim
Re: [Repeater-Builder] 406-420 MHz Radios
OH! well maybe he'll see this. happy holidays to all anyhow. mdm strongfont color=#ffTed Bleiman Kfont color=#ff9/fontMDM/font/strong strongfont color=#ffMDMnbsp; Radionbsp;nbsp;nbsp;nbsp;/font/strongstrongfont color=#ffnbsp;nbsp;nbsp;nbsp;nbsp;nbsp;nbsp; If its in stock...we#39;ve got it! P O Box 31353 Chicago, IL 60631-0353 773.631.5130nbsp; fax 773.775.8096nbsp; /font/strong web http://www.mdmradio.com'http://www.mdmradio.com;http://www.mdmradio.com font color=#ffnbsp;email - nbsp;a rel=nofollow target=_blank href=mailto:mdm...@yahoo.com;font color=#60bf00a rel=nofollow target=_blank href=mailto:mdmra...@yahoo.com;mdmra...@yahoo.com/font/anbsp; strongfont color=#ffDIRECT ALL EMAIL/font/strong /font /a From: Chuck Kelsey wb2...@roadrunner.com To: Repeater-Builder@yahoogroups.com Sent: Mon, December 7, 2009 8:54:10 AM Subject: Re: [Repeater-Builder] 406-420 MHz Radios WA7JAW was asking. Chuck WB2EDV - Original Message - From: Joe k1ike_m...@snet. net To: Repeater-Builder@ yahoogroups. com Sent: Monday, December 07, 2009 9:44 AM Subject: Re: [Repeater-Builder] 406-420 MHz Radios Hi Ted, I wasn't looking for a 406-430 radio, were you thinking of someone else? Joe Ted Bleiman K9MDM - MDM Radio wrote: joe i have a mostar 406-430 if that'll do you any good works with mike (I'm pretty sure) $50 + post (it'll ship priority) mdm ted
RE: [Repeater-Builder] MAxtrac Help please
I believe some of the newer mic's don't have the tone encoder in the mic and have it in the radio, I have what I thought was a newer TT mic on my GTX, but no tones. I believe the MSC2000 is one like that. From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of wd8chl Sent: Monday, December 07, 2009 11:11 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] MAxtrac Help please w7nikw7nik wrote: Has anyone rewired the pin out on a Motorola DTMF mic model hmn3013a to a maxtrac 300 . I do not see voltage out the mic jack , this might be a problem . Any help would be great I can get different dtmf mic , but i don't know what model to get . As far as I can tell, it should just plug right in. Any Motorola with the 8-pin modular jack should be wired the same. The only difference I know of is the behavior of the mic, ie, whether the tones are sent continuously as long as you hold the button, or just a short blip when you first hit it. There are also some programmable units with memories, etc. In fact, you can take a DTMF mic from, say, a Micor/Syntor and just change the cord and it should work too. I even took a Mostar DTMF mic and re-wired it for a EFJ challenger low band (7154 I think?). Just moved the wires around in the mic head! If you don't have A+ on the jack, though, yeah, it probably won't work... Jim Since 1974, the award-winning Alpert JFCS has helped families of all faiths throughout most of Palm Beach County, FL, via counseling, seniors services, residences for the disabled, mentoring children, support groups and a lot more. SOLUTIONS FOR LIVING www.JFCSonline.com Please take note of our new website and E-Mail Addresses. Please update your contacts ASAP. . NOTICE: This e-mail message and all attachments transmitted with it are intended solely for the use of the addressee and may contain legally privileged and confidential information. If the reader of this message is not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, copying, or other use of this message or its attachments is strictly prohibited. If you have received this message in error, please notify the sender immediately by replying to this message and please delete it from your computer. image001.jpgimage002.jpg
RE: [Repeater-Builder] Astron RM-35M AGM charging abilities?
Mike, I thought that only the RM-35M-BB has a battery backup circuit built-in; I have an RM-35M power supply in service, and it does not have a battery charging circuit. A very simple method of achieving no-break battery backup is to install a Schottky power diode on the positive output terminal of the power supply, and connect both the battery positive terminal and the radio power leads to the cathode lug of the diode. My preferred Schottky diode for this application is an International Rectifier 122NQ030R. The diode is mounted on a 1 wide copper bar that is placed on the power supply's positive output stud. The diode has a 1/4 output terminal, which makes it very easy to add to an existing system. Note that the R in the diode part number means that it is reverse polarity. The output voltage setting of the power supply must be increased about 1/2 volt to compensate for the forward voltage drop of the Schottky diode. The voltage should be set so that the AGM battery has the recommended float voltage at its terminals while the radios are operating and the system has stabilized at least 24 hours. This voltage will usually be around 14.2-14.5 VDC, depending upon the battery specifications. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Mike Lyon Sent: Sunday, December 06, 2009 10:02 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Astron RM-35M AGM charging abilities? Howdy Folks, I am wondering if anyone has experience with the Astron RM-35M and its built-in charging circuit? Has anyone used it to charge 12VDC AGM batteries? I have 3 motorola Maxtracs (2 RX, 1 TX) that are powered from this power supply and I need to put some backup power on the system. I am wondering, should I buy a separate charger for the AGM batteries (Qty. 2) or is the charging circuit within the the RM-35M sufficient? 73's, Mike Lyon KE6MRE
Re: [Repeater-Builder] Astron RM-35M AGM charging abilities?
Sorry. Yes, it's a -BB version. -Mike On Mon, Dec 7, 2009 at 9:31 AM, Eric Lemmon wb6...@verizon.net wrote: Mike, I thought that only the RM-35M-BB has a battery backup circuit built-in; I have an RM-35M power supply in service, and it does not have a battery charging circuit. A very simple method of achieving no-break battery backup is to install a Schottky power diode on the positive output terminal of the power supply, and connect both the battery positive terminal and the radio power leads to the cathode lug of the diode. My preferred Schottky diode for this application is an International Rectifier 122NQ030R. The diode is mounted on a 1 wide copper bar that is placed on the power supply's positive output stud. The diode has a 1/4 output terminal, which makes it very easy to add to an existing system. Note that the R in the diode part number means that it is reverse polarity. The output voltage setting of the power supply must be increased about 1/2 volt to compensate for the forward voltage drop of the Schottky diode. The voltage should be set so that the AGM battery has the recommended float voltage at its terminals while the radios are operating and the system has stabilized at least 24 hours. This voltage will usually be around 14.2-14.5 VDC, depending upon the battery specifications. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.comRepeater-Builder%40yahoogroups.com [mailto:Repeater-Builder@yahoogroups.comRepeater-Builder%40yahoogroups.com] On Behalf Of Mike Lyon Sent: Sunday, December 06, 2009 10:02 PM To: Repeater-Builder@yahoogroups.com Repeater-Builder%40yahoogroups.com Subject: [Repeater-Builder] Astron RM-35M AGM charging abilities? Howdy Folks, I am wondering if anyone has experience with the Astron RM-35M and its built-in charging circuit? Has anyone used it to charge 12VDC AGM batteries? I have 3 motorola Maxtracs (2 RX, 1 TX) that are powered from this power supply and I need to put some backup power on the system. I am wondering, should I buy a separate charger for the AGM batteries (Qty. 2) or is the charging circuit within the the RM-35M sufficient? 73's, Mike Lyon KE6MRE
Re: [Repeater-Builder] Tait T800 series 1 low band for 6m?
Hi Martin, perhaps the repeater keeper of GB3VI can be of assistance to you: http://www.repeaters.pwp.blueyonder.co.uk/index_files/Page406.htm http://www.repeaters.pwp.blueyonder.co.uk/index_files/Page406.htm73 de Darren G7LWT 2009/12/2 cruizzer77 atlant...@gmx.ch I'm collecting info about using a Tait T800 series 1 low band repeater as a ham 6m repeater, but info is very scarce. I do not own such a repeater yet but know where I'd get one in case I see that there is some hope for success. These are the problems one will most likely run into: First of all the factory software to generate the hex files is very stubborn and refuses to generate files for out of band frequencies. The factory frequency range is 66-88 MHz while I'd need it between 51 and 52 MHz. BTW I only have the old dos software as the newer windows version is nowhere to be found. Second the hardware may need some tweaking, but to what extent? Furthermore I have not found the manuals for the T825 (RX), T827 (Exciter) and T828 (PA) modules. I'd appreciate if those who know these repeaters could say a few words about it. Thanks guys. 73 de Martin HB9TZW
[Repeater-Builder] Rolling Pipe Sound
Thanks for all the post and for the web site and group. It's been very helpful to me as I have been setting up my system. My repeater system is a Kenwood TKR-750 K2, Telwave TPRD-1556 duplexer set (6 cavities), A Telwave Isolator on the PA. Running 1/2 Heilax to a Andrew DB224E antenna. This a repeater at my home as I am on a small hill. The antenna is about 40 feet vertical and 60 feet horizontally from the repeater/office. It works very well but I have had intermod issue that rears its head now and then that sounds like rolling pipe or hollow sound. I am runing a PL on both TX and RX. This sound opens up the receiver even. So my tx pl is getting back into the system. I have hunted down many noise makers in the office that could have been helping out. One was the Linksys router. I am going to replace it anyway as it makes a ton of noise I found. Changing my network from 100 to 10 on the card speed also reduced the noise levels. Still I get the rolling pipe sound now and then and it leaves as fast as it shows up. If I use my other antenna a Diamond F22 also fed with 1/2 Heliax I also get the same result. I do use a preamp but it also seems to not change with or without it. I have even ran it so the receive antenna is alone and the transmit is the other (split). I still get the rolling pipes now and then. I do have a FM radio station on 92.1 about 4 miles from me that is known to have a sloppy signal. Could it be that this is mixing with my system and creating this? Looking at getting a DCI Band pass filter on the receiver side but I am not sure if that is just throwing more money at this project and not getting anywhere still. Just wanted to see if anyone had some ideas? Scott KB7DZR
Re: [Repeater-Builder] Rolling Pipe Sound
You may be locking up with a repeater on the reverse pair during a band opening. Chuck WB2EDV - Original Message - From: offtracks1 worldroa...@fastmail.fm To: Repeater-Builder@yahoogroups.com Sent: Monday, December 07, 2009 3:48 PM Subject: [Repeater-Builder] Rolling Pipe Sound Thanks for all the post and for the web site and group. It's been very helpful to me as I have been setting up my system. My repeater system is a Kenwood TKR-750 K2, Telwave TPRD-1556 duplexer set (6 cavities), A Telwave Isolator on the PA. Running 1/2 Heilax to a Andrew DB224E antenna. This a repeater at my home as I am on a small hill. The antenna is about 40 feet vertical and 60 feet horizontally from the repeater/office. It works very well but I have had intermod issue that rears its head now and then that sounds like rolling pipe or hollow sound. I am runing a PL on both TX and RX. This sound opens up the receiver even. So my tx pl is getting back into the system. I have hunted down many noise makers in the office that could have been helping out. One was the Linksys router. I am going to replace it anyway as it makes a ton of noise I found. Changing my network from 100 to 10 on the card speed also reduced the noise levels. Still I get the rolling pipe sound now and then and it leaves as fast as it shows up. If I use my other antenna a Diamond F22 also fed with 1/2 Heliax I also get the same result. I do use a preamp but it also seems to not change with or without it. I have even ran it so the receive antenna is alone and the transmit is the other (split). I still get the rolling pipes now and then. I do have a FM radio station on 92.1 about 4 miles from me that is known to have a sloppy signal. Could it be that this is mixing with my system and creating this? Looking at getting a DCI Band pass filter on the receiver side but I am not sure if that is just throwing more money at this project and not getting anywhere still. Just wanted to see if anyone had some ideas? Scott KB7DZR Yahoo! Groups Links No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.709 / Virus Database: 270.14.97/2550 - Release Date: 12/07/09 02:33:00
Re: [Repeater-Builder] Rolling Pipe Sound
Scott, You are not alone in this!! I too have been fighting a problem almost exactly like this - I've tried different PL tones on RX and TX and that seemed to keep it from self-oscillating. Seems to happen more when the weather is dry and I describe it as a growl sound. Happening on a MSF5000 at a commercial site. We too have numerous broadcast towers within 2 miles, and lots of Cellular/PCS antennas around. Mine is on UHF, yours appears to be high-band VHF (from the TKR-750 K2 note). I'm still working on a resolution, but again for now try either split tone or remove PL from the transmitter (CSQ). It would keep the repeater keyed up for several seconds, then drop signal and come back again (as long as the tail remained with PL output). I've also shortened the hang timer to 3 seconds to help. It wouldn't bring up the system unless someone kerchunked it, then it started. Tony, KT9AC offtracks1 wrote: Thanks for all the post and for the web site and group. It's been very helpful to me as I have been setting up my system. My repeater system is a Kenwood TKR-750 K2, Telwave TPRD-1556 duplexer set (6 cavities), A Telwave Isolator on the PA. Running 1/2 Heilax to a Andrew DB224E antenna. This a repeater at my home as I am on a small hill. The antenna is about 40 feet vertical and 60 feet horizontally from the repeater/office. It works very well but I have had intermod issue that rears its head now and then that sounds like rolling pipe or hollow sound. I am runing a PL on both TX and RX. This sound opens up the receiver even. So my tx pl is getting back into the system. I have hunted down many noise makers in the office that could have been helping out. One was the Linksys router. I am going to replace it anyway as it makes a ton of noise I found. Changing my network from 100 to 10 on the card speed also reduced the noise levels. Still I get the rolling pipe sound now and then and it leaves as fast as it shows up. If I use my other antenna a Diamond F22 also fed with 1/2 Heliax I also get the same result. I do use a preamp but it also seems to not change with or without it. I have even ran it so the receive antenna is alone and the transmit is the other (split). I still get the rolling pipes now and then. I do have a FM radio station on 92.1 about 4 miles from me that is known to have a sloppy signal. Could it be that this is mixing with my system and creating this? Looking at getting a DCI Band pass filter on the receiver side but I am not sure if that is just throwing more money at this project and not getting anywhere still. Just wanted to see if anyone had some ideas? Scott KB7DZR Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * Your email settings: Individual Email | Traditional * To change settings online go to: http://groups.yahoo.com/group/Repeater-Builder/join (Yahoo! ID required) * To change settings via email: repeater-builder-dig...@yahoogroups.com repeater-builder-fullfeatu...@yahoogroups.com * To unsubscribe from this group, send an email to: repeater-builder-unsubscr...@yahoogroups.com * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[Repeater-Builder] pearl schwartz day
Wishing you all a pleasant Pearl Schwartz day... Ted Bleiman K9MDMMDM Radio If its in stock...we;ve got it! P O Box 31353 Chicago ,IL 60631-0353 773 631 5130
[Repeater-Builder] Re: Rolling Pipe Sound
Thanks for the quick reply The revers pair is a good point. I am in a remote area and did the full coordination but still we have had some odd ducting here as I am close to 9K mountains and I am at around 4K feet to start with. Tony I have not ran it without the tx pl. I have a few folks that like that including myself as I drop the tone before the TX, the controller is a ICS. But still for testing I may do that. I have echolink so I hook it up at night to the Ireland conference and set the system to listen only so I do not interfere with folks. Then with a program called echoproducer I can log each time the system gets kerchunched. sometimes its fine other times the log is big. Sorry I failed to put down its on 147.000 TX 147.600 RX. I have a repeater info page off of my weather station site. http://www.josephoregonweather.com/repeater.html --- In Repeater-Builder@yahoogroups.com, Tony KT9AC kt...@... wrote: Scott, You are not alone in this!! I too have been fighting a problem almost exactly like this - I've tried different PL tones on RX and TX and that seemed to keep it from self-oscillating. Seems to happen more when the weather is dry and I describe it as a growl sound. Happening on a MSF5000 at a commercial site. We too have numerous broadcast towers within 2 miles, and lots of Cellular/PCS antennas around. Mine is on UHF, yours appears to be high-band VHF (from the TKR-750 K2 note). I'm still working on a resolution, but again for now try either split tone or remove PL from the transmitter (CSQ). It would keep the repeater keyed up for several seconds, then drop signal and come back again (as long as the tail remained with PL output). I've also shortened the hang timer to 3 seconds to help. It wouldn't bring up the system unless someone kerchunked it, then it started. Tony, KT9AC
Re: [Repeater-Builder] Re: Rolling Pipe Sound
Scott, I also would second the reverse repeater theory. Years ago (many) we had a repeater in Western PA on 147.165 that would lock up with a Michigan repeater on 147.765 (both rightfully coordinated) and produce the pipe sound. In those days (1980s) everyone ran carrier squelch and we had some Lake Erie ducting once in a while. Its up to you, but was just a quick workaround that I started doing. Funny thing is I can get the growl when the system ran DPL and conditions are right...but its not the repeater since another temporary system I put in did the same thing. Sorry to hijack your note with my issue, but was hoping that there would be some commonality and we would both benefit. Thanks for the information on echoproducer, I might look into that. Tony offtracks1 wrote: Thanks for the quick reply The revers pair is a good point. I am in a remote area and did the full coordination but still we have had some odd ducting here as I am close to 9K mountains and I am at around 4K feet to start with. Tony I have not ran it without the tx pl. I have a few folks that like that including myself as I drop the tone before the TX, the controller is a ICS. But still for testing I may do that. I have echolink so I hook it up at night to the Ireland conference and set the system to listen only so I do not interfere with folks. Then with a program called echoproducer I can log each time the system gets kerchunched. sometimes its fine other times the log is big. Sorry I failed to put down its on 147.000 TX 147.600 RX. I have a repeater info page off of my weather station site. http://www.josephoregonweather.com/repeater.html http://www.josephoregonweather.com/repeater.html --- In Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com, Tony KT9AC kt...@... wrote: Scott, You are not alone in this!! I too have been fighting a problem almost exactly like this - I've tried different PL tones on RX and TX and that seemed to keep it from self-oscillating. Seems to happen more when the weather is dry and I describe it as a growl sound. Happening on a MSF5000 at a commercial site. We too have numerous broadcast towers within 2 miles, and lots of Cellular/PCS antennas around. Mine is on UHF, yours appears to be high-band VHF (from the TKR-750 K2 note). I'm still working on a resolution, but again for now try either split tone or remove PL from the transmitter (CSQ). It would keep the repeater keyed up for several seconds, then drop signal and come back again (as long as the tail remained with PL output). I've also shortened the hang timer to 3 seconds to help. It wouldn't bring up the system unless someone kerchunked it, then it started. Tony, KT9AC Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * Your email settings: Individual Email | Traditional * To change settings online go to: http://groups.yahoo.com/group/Repeater-Builder/join (Yahoo! ID required) * To change settings via email: repeater-builder-dig...@yahoogroups.com repeater-builder-fullfeatu...@yahoogroups.com * To unsubscribe from this group, send an email to: repeater-builder-unsubscr...@yahoogroups.com * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[Repeater-Builder] Re: Rolling Pipe Sound
No worries, the more info the better. Echoproducer is the Bees Knees if you are running echolink. It is one very impressive and free program. Peter has put a lot of work into it. Scott --- In Repeater-Builder@yahoogroups.com, Tony KT9AC kt...@... wrote: Scott, I also would second the reverse repeater theory. Years ago (many) we had a repeater in Western PA on 147.165 that would lock up with a Michigan repeater on 147.765 (both rightfully coordinated) and produce the pipe sound. In those days (1980s) everyone ran carrier squelch and we had some Lake Erie ducting once in a while. Its up to you, but was just a quick workaround that I started doing. Funny thing is I can get the growl when the system ran DPL and conditions are right...but its not the repeater since another temporary system I put in did the same thing. Sorry to hijack your note with my issue, but was hoping that there would be some commonality and we would both benefit. Thanks for the information on echoproducer, I might look into that. Tony offtracks1 wrote: Thanks for the quick reply The revers pair is a good point. I am in a remote area and did the full coordination but still we have had some odd ducting here as I am close to 9K mountains and I am at around 4K feet to start with. Tony I have not ran it without the tx pl. I have a few folks that like that including myself as I drop the tone before the TX, the controller is a ICS. But still for testing I may do that. I have echolink so I hook it up at night to the Ireland conference and set the system to listen only so I do not interfere with folks. Then with a program called echoproducer I can log each time the system gets kerchunched. sometimes its fine other times the log is big. Sorry I failed to put down its on 147.000 TX 147.600 RX. I have a repeater info page off of my weather station site. http://www.josephoregonweather.com/repeater.html http://www.josephoregonweather.com/repeater.html --- In Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com, Tony KT9AC kt9ac@ wrote: Scott, You are not alone in this!! I too have been fighting a problem almost exactly like this - I've tried different PL tones on RX and TX and that seemed to keep it from self-oscillating. Seems to happen more when the weather is dry and I describe it as a growl sound. Happening on a MSF5000 at a commercial site. We too have numerous broadcast towers within 2 miles, and lots of Cellular/PCS antennas around. Mine is on UHF, yours appears to be high-band VHF (from the TKR-750 K2 note). I'm still working on a resolution, but again for now try either split tone or remove PL from the transmitter (CSQ). It would keep the repeater keyed up for several seconds, then drop signal and come back again (as long as the tail remained with PL output). I've also shortened the hang timer to 3 seconds to help. It wouldn't bring up the system unless someone kerchunked it, then it started. Tony, KT9AC
RE: [Repeater-Builder] Astron RM-35M AGM charging abilities?
Hi Eric, I have been trying to follow these posts on battery back power. Under this arrangement you describe, will the supply not get hot with the Schottky Diode in place if the battery is discharged very low? I am researching the best way to hook the battery to my Astron which does not have the back-up charger. Thanks for all of the information. 73 JIM KA2AJH From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Mike Lyon Sent: Monday, December 07, 2009 12:45 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Astron RM-35M AGM charging abilities? Sorry. Yes, it's a -BB version. -Mike On Mon, Dec 7, 2009 at 9:31 AM, Eric Lemmon wb6...@verizon.net wrote: Mike, I thought that only the RM-35M-BB has a battery backup circuit built-in; I have an RM-35M power supply in service, and it does not have a battery charging circuit. A very simple method of achieving no-break battery backup is to install a Schottky power diode on the positive output terminal of the power supply, and connect both the battery positive terminal and the radio power leads to the cathode lug of the diode. My preferred Schottky diode for this application is an International Rectifier 122NQ030R. The diode is mounted on a 1 wide copper bar that is placed on the power supply's positive output stud. The diode has a 1/4 output terminal, which makes it very easy to add to an existing system. Note that the R in the diode part number means that it is reverse polarity. The output voltage setting of the power supply must be increased about 1/2 volt to compensate for the forward voltage drop of the Schottky diode. The voltage should be set so that the AGM battery has the recommended float voltage at its terminals while the radios are operating and the system has stabilized at least 24 hours. This voltage will usually be around 14.2-14.5 VDC, depending upon the battery specifications. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com [mailto:Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com ] On Behalf Of Mike Lyon Sent: Sunday, December 06, 2009 10:02 PM To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Subject: [Repeater-Builder] Astron RM-35M AGM charging abilities? Howdy Folks, I am wondering if anyone has experience with the Astron RM-35M and its built-in charging circuit? Has anyone used it to charge 12VDC AGM batteries? I have 3 motorola Maxtracs (2 RX, 1 TX) that are powered from this power supply and I need to put some backup power on the system. I am wondering, should I buy a separate charger for the AGM batteries (Qty. 2) or is the charging circuit within the the RM-35M sufficient? 73's, Mike Lyon KE6MRE
[Repeater-Builder] Sd174 uhf
Hi guys .I have a SD 174 maxon data radio and it seems to not be able filter other transmitters near by .The receiver opens up with squark noise even when programmed with ctcss .can anyone suggest whats possibly the problem is and possible fixes.I have one on site and it seems to be working perfectly but I know of two that are the same carn't filter signals nearby Thank You, Ian Wells, Kerinvale Comaudio, 361 Camboon Road.Biloela.4715 Ph 0749922449 or 0409159932 or 0749922574 www.kerinvalecomaudio.com.au .
Re: [Repeater-Builder] Astron RM-35M AGM charging abilities?
Is the circuit in the -BB version a charger or is it simply just a switch? Thanks, Mike On Mon, Dec 7, 2009 at 2:39 PM, Jim Cicirello ka2...@gmail.com wrote: Hi Eric, I have been trying to follow these posts on battery back power. Under this arrangement you describe, will the supply *not* get hot with the Schottky Diode in place if the battery is discharged very low? I am researching the best way to hook the battery to my Astron which does not have the back-up charger. Thanks for all of the information. 73 JIM KA2AJH *From:* Repeater-Builder@yahoogroups.com [mailto: repeater-buil...@yahoogroups.com] *On Behalf Of *Mike Lyon *Sent:* Monday, December 07, 2009 12:45 PM *To:* Repeater-Builder@yahoogroups.com *Subject:* Re: [Repeater-Builder] Astron RM-35M AGM charging abilities? Sorry. Yes, it's a -BB version. -Mike On Mon, Dec 7, 2009 at 9:31 AM, Eric Lemmon wb6...@verizon.net wrote: Mike, I thought that only the RM-35M-BB has a battery backup circuit built-in; I have an RM-35M power supply in service, and it does not have a battery charging circuit. A very simple method of achieving no-break battery backup is to install a Schottky power diode on the positive output terminal of the power supply, and connect both the battery positive terminal and the radio power leads to the cathode lug of the diode. My preferred Schottky diode for this application is an International Rectifier 122NQ030R. The diode is mounted on a 1 wide copper bar that is placed on the power supply's positive output stud. The diode has a 1/4 output terminal, which makes it very easy to add to an existing system. Note that the R in the diode part number means that it is reverse polarity. The output voltage setting of the power supply must be increased about 1/2 volt to compensate for the forward voltage drop of the Schottky diode. The voltage should be set so that the AGM battery has the recommended float voltage at its terminals while the radios are operating and the system has stabilized at least 24 hours. This voltage will usually be around 14.2-14.5 VDC, depending upon the battery specifications. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.comRepeater-Builder%40yahoogroups.com [mailto:Repeater-Builder@yahoogroups.comRepeater-Builder%40yahoogroups.com] On Behalf Of Mike Lyon Sent: Sunday, December 06, 2009 10:02 PM To: Repeater-Builder@yahoogroups.com Repeater-Builder%40yahoogroups.com Subject: [Repeater-Builder] Astron RM-35M AGM charging abilities? Howdy Folks, I am wondering if anyone has experience with the Astron RM-35M and its built-in charging circuit? Has anyone used it to charge 12VDC AGM batteries? I have 3 motorola Maxtracs (2 RX, 1 TX) that are powered from this power supply and I need to put some backup power on the system. I am wondering, should I buy a separate charger for the AGM batteries (Qty. 2) or is the charging circuit within the the RM-35M sufficient? 73's, Mike Lyon KE6MRE
[Repeater-Builder] Re: Astron RM-35M AGM charging abilities?
A very simple method of achieving no-break battery backup is to install a Schottky power diode on the positive output terminal of the power supply, and connect both the battery positive terminal and the radio power leads to the cathode lug of the diode. What happens to the battery and power supply in a long term discharge/fault condition? What happens when power is restored after a long term discharge condition? s.
RE: [Repeater-Builder] Rolling Pipe Sound
Scott, A likely suspect is a carrier being emitted by a nearby computer or microprocessor. A few years ago, I was setting up a GR1225 repeater on a VHF channel, and I noticed that the receive indicator LED was lit steadily. My spectrum analyzer revealed that there was a low-level but steady carrier a few kHz off from my receive frequency. I then used my T-Hunt equipment to pinpoint my desktop computer as the source. In the course of my investigation, I also found weak but benign carriers being emitted from my TV set, my idle microwave oven, and my programmable thermostat. If it is an intermod problem, perhaps a DCI filter is far too wide to be of much help. I'd strongly suggest putting a 5 or 8 bandpass cavity ahead of the receiver- it is much sharper than the DCI product. Do you have a second harmonic notch filter, or a low-pass filter, following the isolator? Are all of the jumper cables double-shielded, with proper connectors on each end- that is, no adapters or barrels? 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of offtracks1 Sent: Monday, December 07, 2009 12:49 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Rolling Pipe Sound Thanks for all the post and for the web site and group. It's been very helpful to me as I have been setting up my system. My repeater system is a Kenwood TKR-750 K2, Telewave TPRD-1556 duplexer set (6 cavities), A Telewave Isolator on the PA. Running 1/2 Heilax to a Andrew DB224E antenna. This a repeater at my home as I am on a small hill. The antenna is about 40 feet vertical and 60 feet horizontally from the repeater/office. It works very well but I have had intermod issue that rears its head now and then that sounds like rolling pipe or hollow sound. I am runing a PL on both TX and RX. This sound opens up the receiver even. So my tx pl is getting back into the system. I have hunted down many noise makers in the office that could have been helping out. One was the Linksys router. I am going to replace it anyway as it makes a ton of noise I found. Changing my network from 100 to 10 on the card speed also reduced the noise levels. Still I get the rolling pipe sound now and then and it leaves as fast as it shows up. If I use my other antenna a Diamond F22 also fed with 1/2 Heliax I also get the same result. I do use a preamp but it also seems to not change with or without it. I have even ran it so the receive antenna is alone and the transmit is the other (split). I still get the rolling pipes now and then. I do have a FM radio station on 92.1 about 4 miles from me that is known to have a sloppy signal. Could it be that this is mixing with my system and creating this? Looking at getting a DCI Band pass filter on the receiver side but I am not sure if that is just throwing more money at this project and not getting anywhere still. Just wanted to see if anyone had some ideas? Scott KB7DZR
[Repeater-Builder] Programming a CAT1000
I found my DOS disk program, but can't find my notes on how to use the program. Anyone have this information? Also, it looks like someone changed the default password of cat1000, does anyone know if it can be reset? I'm working on a repeater for a club and I'm trying to get it off my bench, any help is appreciated! 73, Joe, K1ike Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * Your email settings: Individual Email | Traditional * To change settings online go to: http://groups.yahoo.com/group/Repeater-Builder/join (Yahoo! ID required) * To change settings via email: repeater-builder-dig...@yahoogroups.com repeater-builder-fullfeatu...@yahoogroups.com * To unsubscribe from this group, send an email to: repeater-builder-unsubscr...@yahoogroups.com * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
RE: [Repeater-Builder] Astron RM-35M AGM charging abilities?
Jim, The Schottky diode approach works best with a switching supply that is inherently current-limiting. Some linear supplies cannot start under load, following a power outage. Although it may take a day or two to recharge an AGM battery when it only sees the float voltage. Ideally, the AGM battery should be bulk-charged at a higher than normal voltage, and then put back on float voltage once it is fully charged. But, that process involves a more complex and expensive setup than most folks want. My Schottky diode setup works just fine and is simple to implement. Some folks may argue that a low-voltage disconnect feature is needed, but many radios simply stop working once the supply voltage drops much below 9 or 10 volts- sort of a built-in LVD feature. Of course, some radios and controllers will continue to draw current all the way down to zero volts, and I avoid such power hogs for that reason. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Jim Cicirello Sent: Monday, December 07, 2009 2:40 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Astron RM-35M AGM charging abilities? Hi Eric, I have been trying to follow these posts on battery back power. Under this arrangement you describe, will the supply not get hot with the Schottky Diode in place if the battery is discharged very low? I am researching the best way to hook the battery to my Astron which does not have the back-up charger. Thanks for all of the information. 73 JIM KA2AJH From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Mike Lyon Sent: Monday, December 07, 2009 12:45 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Astron RM-35M AGM charging abilities? Sorry. Yes, it's a -BB version. -Mike On Mon, Dec 7, 2009 at 9:31 AM, Eric Lemmon wb6...@verizon.net mailto:wb6...@verizon.net wrote: Mike, I thought that only the RM-35M-BB has a battery backup circuit built-in; I have an RM-35M power supply in service, and it does not have a battery charging circuit. A very simple method of achieving no-break battery backup is to install a Schottky power diode on the positive output terminal of the power supply, and connect both the battery positive terminal and the radio power leads to the cathode lug of the diode. My preferred Schottky diode for this application is an International Rectifier 122NQ030R. The diode is mounted on a 1 wide copper bar that is placed on the power supply's positive output stud. The diode has a 1/4 output terminal, which makes it very easy to add to an existing system. Note that the R in the diode part number means that it is reverse polarity. The output voltage setting of the power supply must be increased about 1/2 volt to compensate for the forward voltage drop of the Schottky diode. The voltage should be set so that the AGM battery has the recommended float voltage at its terminals while the radios are operating and the system has stabilized at least 24 hours. This voltage will usually be around 14.2-14.5 VDC, depending upon the battery specifications. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com [mailto:Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com ] On Behalf Of Mike Lyon Sent: Sunday, December 06, 2009 10:02 PM To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Subject: [Repeater-Builder] Astron RM-35M AGM charging abilities? Howdy Folks, I am wondering if anyone has experience with the Astron RM-35M and its built-in charging circuit? Has anyone used it to charge 12VDC AGM batteries? I have 3 motorola Maxtracs (2 RX, 1 TX) that are powered from this power supply and I need to put some backup power on the system. I am wondering, should I buy a separate charger for the AGM batteries (Qty. 2) or is the charging circuit within the the RM-35M sufficient? 73's, Mike Lyon KE6MRE
RE: [Repeater-Builder] Astron RM-35M AGM charging abilities?
Mike, The -BB circuit is simply some diodes and a resistor to limit charging current. The basic circuit is found here: www.repeater-builder.com/astron/pix/astron-rm50a-bb.jpg 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Mike Lyon Sent: Monday, December 07, 2009 2:43 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Astron RM-35M AGM charging abilities? Is the circuit in the -BB version a charger or is it simply just a switch? Thanks, Mike On Mon, Dec 7, 2009 at 2:39 PM, Jim Cicirello ka2...@gmail.com mailto:ka2...@gmail.com wrote: Hi Eric, I have been trying to follow these posts on battery back power. Under this arrangement you describe, will the supply not get hot with the Schottky Diode in place if the battery is discharged very low? I am researching the best way to hook the battery to my Astron which does not have the back-up charger. Thanks for all of the information. 73 JIM KA2AJH From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder@yahoogroups.com [mailto:Repeater-Builder@yahoogroups.com mailto:Repeater-Builder@yahoogroups.com ] On Behalf Of Mike Lyon Sent: Monday, December 07, 2009 12:45 PM To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Astron RM-35M AGM charging abilities? Sorry. Yes, it's a -BB version. -Mike On Mon, Dec 7, 2009 at 9:31 AM, Eric Lemmon wb6...@verizon.net mailto:wb6...@verizon.net wrote: Mike, I thought that only the RM-35M-BB has a battery backup circuit built-in; I have an RM-35M power supply in service, and it does not have a battery charging circuit. A very simple method of achieving no-break battery backup is to install a Schottky power diode on the positive output terminal of the power supply, and connect both the battery positive terminal and the radio power leads to the cathode lug of the diode. My preferred Schottky diode for this application is an International Rectifier 122NQ030R. The diode is mounted on a 1 wide copper bar that is placed on the power supply's positive output stud. The diode has a 1/4 output terminal, which makes it very easy to add to an existing system. Note that the R in the diode part number means that it is reverse polarity. The output voltage setting of the power supply must be increased about 1/2 volt to compensate for the forward voltage drop of the Schottky diode. The voltage should be set so that the AGM battery has the recommended float voltage at its terminals while the radios are operating and the system has stabilized at least 24 hours. This voltage will usually be around 14.2-14.5 VDC, depending upon the battery specifications. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com [mailto:Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com ] On Behalf Of Mike Lyon Sent: Sunday, December 06, 2009 10:02 PM To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Subject: [Repeater-Builder] Astron RM-35M AGM charging abilities? Howdy Folks, I am wondering if anyone has experience with the Astron RM-35M and its built-in charging circuit? Has anyone used it to charge 12VDC AGM batteries? I have 3 motorola Maxtracs (2 RX, 1 TX) that are powered from this power supply and I need to put some backup power on the system. I am wondering, should I buy a separate charger for the AGM batteries (Qty. 2) or is the charging circuit within the the RM-35M sufficient? 73's, Mike Lyon KE6MRE
Re: [Repeater-Builder] Astron RM-35M AGM charging abilities?
Let me put in my two cents worth. Feed the power Thru the NO contact of a relay. Connect the coil of the relay on the downside and the relay will drop out and kill the power to the radio and the coil before the battery is dead. A reset switch across the contacts will start the system. Sent from my Verizon Wireless BlackBerry -Original Message- From: Eric Lemmon wb6...@verizon.net Date: Mon, 07 Dec 2009 15:12:13 To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Astron RM-35M AGM charging abilities? Jim, The Schottky diode approach works best with a switching supply that is inherently current-limiting. Some linear supplies cannot start under load, following a power outage. Although it may take a day or two to recharge an AGM battery when it only sees the float voltage. Ideally, the AGM battery should be bulk-charged at a higher than normal voltage, and then put back on float voltage once it is fully charged. But, that process involves a more complex and expensive setup than most folks want. My Schottky diode setup works just fine and is simple to implement. Some folks may argue that a low-voltage disconnect feature is needed, but many radios simply stop working once the supply voltage drops much below 9 or 10 volts- sort of a built-in LVD feature. Of course, some radios and controllers will continue to draw current all the way down to zero volts, and I avoid such power hogs for that reason. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Jim Cicirello Sent: Monday, December 07, 2009 2:40 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Astron RM-35M AGM charging abilities? Hi Eric, I have been trying to follow these posts on battery back power. Under this arrangement you describe, will the supply not get hot with the Schottky Diode in place if the battery is discharged very low? I am researching the best way to hook the battery to my Astron which does not have the back-up charger. Thanks for all of the information. 73 JIM KA2AJH From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Mike Lyon Sent: Monday, December 07, 2009 12:45 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Astron RM-35M AGM charging abilities? Sorry. Yes, it's a -BB version. -Mike On Mon, Dec 7, 2009 at 9:31 AM, Eric Lemmon wb6...@verizon.net mailto:wb6...@verizon.net wrote: Mike, I thought that only the RM-35M-BB has a battery backup circuit built-in; I have an RM-35M power supply in service, and it does not have a battery charging circuit. A very simple method of achieving no-break battery backup is to install a Schottky power diode on the positive output terminal of the power supply, and connect both the battery positive terminal and the radio power leads to the cathode lug of the diode. My preferred Schottky diode for this application is an International Rectifier 122NQ030R. The diode is mounted on a 1 wide copper bar that is placed on the power supply's positive output stud. The diode has a 1/4 output terminal, which makes it very easy to add to an existing system. Note that the R in the diode part number means that it is reverse polarity. The output voltage setting of the power supply must be increased about 1/2 volt to compensate for the forward voltage drop of the Schottky diode. The voltage should be set so that the AGM battery has the recommended float voltage at its terminals while the radios are operating and the system has stabilized at least 24 hours. This voltage will usually be around 14.2-14.5 VDC, depending upon the battery specifications. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com [mailto:Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com ] On Behalf Of Mike Lyon Sent: Sunday, December 06, 2009 10:02 PM To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Subject: [Repeater-Builder] Astron RM-35M AGM charging abilities? Howdy Folks, I am wondering if anyone has experience with the Astron RM-35M and its built-in charging circuit? Has anyone used it to charge 12VDC AGM batteries? I have 3 motorola Maxtracs (2 RX, 1 TX) that are powered from this power supply and I need to put some backup power on the system. I am wondering, should I buy a separate charger for the AGM batteries (Qty. 2) or is the charging circuit within the the RM-35M sufficient? 73's, Mike Lyon KE6MRE
RE: [Repeater-Builder] Programming a CAT1000
Joe, Have you got a manual? If not, it's available on the CATAUTO website. You need to do a Dipswitch 7 reset to reset the password. Per the manual: Switch 7 This switch is used to initialize the CAT-1000B. Set this switch to ON. Cycle the power OFF and back ON. During power-up, the memory will be flushed and reloaded with default values. The voice will say: RESET DATA LOAD COMPLETED. Set switch #7 to the OFF position. Don't forget, if you're programming by the Serial Port, you have to set Dipswitch 8 ON before programming and OFF again when complete. This switch is used to program a new unlock number. Set switch 8 to ON. The voice will say: ENTER CONTROL. After the seven-digit unlock number is entered, set switch 8 to OFF. This switch is also used to activate the CAT-1000B computer interface. This permits programming of the CAT-1000B through the RS-232 serial port. Set dipswitch 8 to ON and apply power to the CAT-1000B. After the power up message is complete, the CAT- 1000B will automatically switch to the computer terminal programming mode. This RS- 232 port is configured Mike -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:Repeater- buil...@yahoogroups.com] On Behalf Of Joe Sent: Monday, December 07, 2009 6:02 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Programming a CAT1000 I found my DOS disk program, but can't find my notes on how to use the program. Anyone have this information? Also, it looks like someone changed the default password of cat1000, does anyone know if it can be reset? I'm working on a repeater for a club and I'm trying to get it off my bench, any help is appreciated! 73, Joe, K1ike Yahoo! Groups Links
Re: [Repeater-Builder] Sd174 uhf
The lack of a front end comes to mind. You basicly got there a hand held in a pretty box with a DB-9. Try adding a bandpass filter, such as a bandpass cavity, shorted coaxial stub or a interdigital bandpass filter. On Mon, Dec 7, 2009 at 3:42 PM, kerinvale kerin...@pacific.net.au wrote: Hi guys .I have a SD 174 maxon data radio and it seems to not be able filter other transmitters near by .The receiver opens up with squark noise even when programmed with ctcss .can anyone suggest whats possibly the problem is and possible fixes.I have one on site and it seems to be working perfectly but I know of two that are the same carn't filter signals nearby Thank You, Ian Wells, Kerinvale Comaudio, 361 Camboon Road.Biloela.4715 Ph 0749922449 or 0409159932 or 0749922574 www.kerinvalecomaudio.com.au .
[Repeater-Builder] Re: Rolling Pipe Sound
The router is right at 147.580 to almost 147.595. The repeater input is 147.600. So I plan to take that offline. All that cables are double shielded with no adapters ect. I do not have anything between the isolator and the duplexer. Where is a good dealer for a 5 or 8 band pass for the receiver? I may look at going with that for the first step as it is not very bad but a bugger that pops up now and then. Thanks for the help. Scott --- In Repeater-Builder@yahoogroups.com, Eric Lemmon wb6...@... wrote: Scott, A likely suspect is a carrier being emitted by a nearby computer or microprocessor. A few years ago, I was setting up a GR1225 repeater on a VHF channel, and I noticed that the receive indicator LED was lit steadily. My spectrum analyzer revealed that there was a low-level but steady carrier a few kHz off from my receive frequency. I then used my T-Hunt equipment to pinpoint my desktop computer as the source. In the course of my investigation, I also found weak but benign carriers being emitted from my TV set, my idle microwave oven, and my programmable thermostat. If it is an intermod problem, perhaps a DCI filter is far too wide to be of much help. I'd strongly suggest putting a 5 or 8 bandpass cavity ahead of the receiver- it is much sharper than the DCI product. Do you have a second harmonic notch filter, or a low-pass filter, following the isolator? Are all of the jumper cables double-shielded, with proper connectors on each end- that is, no adapters or barrels? 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of offtracks1 Sent: Monday, December 07, 2009 12:49 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Rolling Pipe Sound Thanks for all the post and for the web site and group. It's been very helpful to me as I have been setting up my system. My repeater system is a Kenwood TKR-750 K2, Telewave TPRD-1556 duplexer set (6 cavities), A Telewave Isolator on the PA. Running 1/2 Heilax to a Andrew DB224E antenna. This a repeater at my home as I am on a small hill. The antenna is about 40 feet vertical and 60 feet horizontally from the repeater/office. It works very well but I have had intermod issue that rears its head now and then that sounds like rolling pipe or hollow sound. I am runing a PL on both TX and RX. This sound opens up the receiver even. So my tx pl is getting back into the system. I have hunted down many noise makers in the office that could have been helping out. One was the Linksys router. I am going to replace it anyway as it makes a ton of noise I found. Changing my network from 100 to 10 on the card speed also reduced the noise levels. Still I get the rolling pipe sound now and then and it leaves as fast as it shows up. If I use my other antenna a Diamond F22 also fed with 1/2 Heliax I also get the same result. I do use a preamp but it also seems to not change with or without it. I have even ran it so the receive antenna is alone and the transmit is the other (split). I still get the rolling pipes now and then. I do have a FM radio station on 92.1 about 4 miles from me that is known to have a sloppy signal. Could it be that this is mixing with my system and creating this? Looking at getting a DCI Band pass filter on the receiver side but I am not sure if that is just throwing more money at this project and not getting anywhere still. Just wanted to see if anyone had some ideas? Scott KB7DZR
Re: [Repeater-Builder] Sd174 uhf
Our TX and rx frequencies are 10 meg apart so a band pass filter may have problems giving good signal on both or should I tune the filter in the middle of the two frequencies Thank You ,Ian Wells Kerinvale Comaudio, 361 Camboon road, Biloela.4715 Ph 0749922449 Mb 0409159932 Hm 0749922574 Fx 0749922767 www.kerinvalecomaudio.com.au ---Original Message--- From: DCFluX Date: 8/12/2009 10:53:00 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Sd174 uhf The lack of a front end comes to mind. You basicly got there a hand held in a pretty box with a DB-9. Try adding a bandpass filter, such as a bandpass cavity, shorted coaxial stub or a interdigital bandpass filter. On Mon, Dec 7, 2009 at 3:42 PM, kerinvale kerin...@pacific.net.au wrote: Hi guys .I have a SD 174 maxon data radio and it seems to not be able filter other transmitters near by .The receiver opens up with squark noise even when programmed with ctcss .can anyone suggest whats possibly the problem is and possible fixes.I have one on site and it seems to be working perfectly but I know of two that are the same carn't filter signals nearby Thank You, Ian Wells, Kerinvale Comaudio, 361 Camboon Road.Biloela.4715 Ph 0749922449 or 0409159932 or 0749922574 www.kerinvalecomaudio.com.au . faint_grain.jpg
Re: [Repeater-Builder] Re: Rolling Pipe Sound
Just catchingup on this... yes the infamous rolling pipe sound. We had an issue with a link receiver that occassionaly would get hung-up in a loop, low audio but the correct PL. We switched from PL to DCT on the links and that solved the problem. We spent a year hunting for the source but no joy. Good Luck, dave WA3GIN W4AVA Trustee - Original Message - From: offtracks1 To: Repeater-Builder@yahoogroups.com Sent: Monday, December 07, 2009 5:25 PM Subject: [Repeater-Builder] Re: Rolling Pipe Sound No worries, the more info the better. Echoproducer is the Bees Knees if you are running echolink. It is one very impressive and free program. Peter has put a lot of work into it. Scott --- In Repeater-Builder@yahoogroups.com, Tony KT9AC kt...@... wrote:
Re: [Repeater-Builder] Sd174 uhf
depends on the quality of the filter. I would try using the coax stub routine with RG-58 as the coax, that should be fairly wide. But look at it on a spectrum analyzer to be sure it will pass both signals. If not try building a 3-5 pole interdigital BPF. Those can tune 10MHz wide easy. On Mon, Dec 7, 2009 at 4:57 PM, Ian Wells kerin...@pacific.net.au wrote: Our TX and rx frequencies are 10 meg apart so a band pass filter may have problems giving good signal on both or should I tune the filter in the middle of the two frequencies Thank You ,Ian Wells Kerinvale Comaudio, 361 Camboon road, Biloela.4715 Ph 0749922449 Mb 0409159932 Hm 0749922574 Fx 0749922767 www.kerinvalecomaudio.com.au *---Original Message---* *From:* DCFluX dcf...@gmail.com *Date:* 8/12/2009 10:53:00 AM *To:* Repeater-Builder@yahoogroups.com *Subject:* Re: [Repeater-Builder] Sd174 uhf The lack of a front end comes to mind. You basicly got there a hand held in a pretty box with a DB-9. Try adding a bandpass filter, such as a bandpass cavity, shorted coaxial stub or a interdigital bandpass filter. On Mon, Dec 7, 2009 at 3:42 PM, kerinvale kerin...@pacific.net.au wrote: Hi guys .I have a SD 174 maxon data radio and it seems to not be able filter other transmitters near by .The receiver opens up with squark noise even when programmed with ctcss .can anyone suggest whats possibly the problem is and possible fixes.I have one on site and it seems to be working perfectly but I know of two that are the same carn't filter signals nearby Thank You, Ian Wells, Kerinvale Comaudio, 361 Camboon Road.Biloela.4715 Ph 0749922449 or 0409159932 or 0749922574 www.kerinvalecomaudio.com.au .
Re: [Repeater-Builder] Re: Rolling Pipe Sound
Certain linksys routers may be able to take different the firmware. http://www.dd-wrt.com/site/index Of particular note is the ability to change the clock speed. Also it has been my experience that the router isn't really the source of the interference. Try switching the SMPS wall wart to one of the linear variety. On Mon, Dec 7, 2009 at 5:00 PM, WA3GIN wa3...@comcast.net wrote: Just catchingup on this... yes the infamous rolling pipe sound. We had an issue with a link receiver that occassionaly would get hung-up in a loop, low audio but the correct PL. We switched from PL to DCT on the links and that solved the problem. We spent a year hunting for the source but no joy. Good Luck, dave WA3GIN W4AVA Trustee - Original Message - *From:* offtracks1 worldroa...@fastmail.fm *To:* Repeater-Builder@yahoogroups.com *Sent:* Monday, December 07, 2009 5:25 PM *Subject:* [Repeater-Builder] Re: Rolling Pipe Sound No worries, the more info the better. Echoproducer is the Bees Knees if you are running echolink. It is one very impressive and free program. Peter has put a lot of work into it. Scott --- In Repeater-Builder@yahoogroups.com, Tony KT9AC kt...@... wrote:
Re: [Repeater-Builder] Sd174 uhf
How would a circulator or isolator work .The transmitt signal from the data radio could pass through to the antenna and the rx signal could be received from the antenna and The signal you wish to remove from the data radio radio on receive could be notched to the dummy load . The data radio radio frequencies are set for 507.025mhz rx 517.025mhz TX and the frequency that is interfering is on 473.200mhz. Thank You ,Ian Wells Kerinvale Comaudio, 361 Camboon road, Biloela.4715 Ph 0749922449 Mb 0409159932 Hm 0749922574 Fx 0749922767 www.kerinvalecomaudio.com.au ---Original Message--- From: DCFluX Date: 8/12/2009 11:08:15 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Sd174 uhf depends on the quality of the filter. I would try using the coax stub routine with RG-58 as the coax, that should be fairly wide. But look at it on a spectrum analyzer to be sure it will pass both signals. If not try building a 3-5 pole interdigital BPF. Those can tune 10MHz wide easy. On Mon, Dec 7, 2009 at 4:57 PM, Ian Wells kerin...@pacific.net.au wrote: Our TX and rx frequencies are 10 meg apart so a band pass filter may have problems giving good signal on both or should I tune the filter in the middle of the two frequencies Thank You ,Ian Wells Kerinvale Comaudio, 361 Camboon road, Biloela.4715 Ph 0749922449 Mb 0409159932 Hm 0749922574 Fx 0749922767 www.kerinvalecomaudio.com.au ---Original Message--- From: DCFluX Date: 8/12/2009 10:53:00 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Sd174 uhf The lack of a front end comes to mind. You basicly got there a hand held in a pretty box with a DB-9. Try adding a bandpass filter, such as a bandpass cavity, shorted coaxial stub or a interdigital bandpass filter. On Mon, Dec 7, 2009 at 3:42 PM, kerinvale kerin...@pacific.net.au wrote: Hi guys .I have a SD 174 maxon data radio and it seems to not be able filter other transmitters near by .The receiver opens up with squark noise even when programmed with ctcss .can anyone suggest whats possibly the problem is and possible fixes.I have one on site and it seems to be working perfectly but I know of two that are the same carn't filter signals nearby Thank You, Ian Wells, Kerinvale Comaudio, 361 Camboon Road.Biloela.4715 Ph 0749922449 or 0409159932 or 0749922574 www.kerinvalecomaudio.com.au . faint_grain.jpg
RE: [Repeater-Builder] Re: Rolling Pipe Sound
Scott, One source is Telewave. Here are the datasheets for the 5 and 8 bandpass cavity filters: www.telewave.com/pdf/TWDS-5021.pdf www.telewave.com/pdf/TWDS-5031.pdf With the 30% Amateur discount, the 5 cavity will cost you about $231 plus shipping, and the 8 cavity is about $100 more. Other sources are Comprod, EMR, TX-RX, and Andrew. Some brands may require purchase through a distributor, such as Tessco, Hutton, or Talley. Always ask about a Ham discount when you are negotiating prices. Depending upon the size of your order, you may get 25% or 30%. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of offtracks1 Sent: Monday, December 07, 2009 3:56 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: Rolling Pipe Sound The router is right at 147.580 to almost 147.595. The repeater input is 147.600. So I plan to take that offline. All that cables are double shielded with no adapters ect. I do not have anything between the isolator and the duplexer. Where is a good dealer for a 5 or 8 band pass for the receiver? I may look at going with that for the first step as it is not very bad but a bugger that pops up now and then. Thanks for the help. Scott --- In Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com , Eric Lemmon wb6...@... wrote: Scott, A likely suspect is a carrier being emitted by a nearby computer or microprocessor. A few years ago, I was setting up a GR1225 repeater on a VHF channel, and I noticed that the receive indicator LED was lit steadily. My spectrum analyzer revealed that there was a low-level but steady carrier a few kHz off from my receive frequency. I then used my T-Hunt equipment to pinpoint my desktop computer as the source. In the course of my investigation, I also found weak but benign carriers being emitted from my TV set, my idle microwave oven, and my programmable thermostat. If it is an intermod problem, perhaps a DCI filter is far too wide to be of much help. I'd strongly suggest putting a 5 or 8 bandpass cavity ahead of the receiver- it is much sharper than the DCI product. Do you have a second harmonic notch filter, or a low-pass filter, following the isolator? Are all of the jumper cables double-shielded, with proper connectors on each end- that is, no adapters or barrels? 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com [mailto:Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com ] On Behalf Of offtracks1 Sent: Monday, December 07, 2009 12:49 PM To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Subject: [Repeater-Builder] Rolling Pipe Sound Thanks for all the post and for the web site and group. It's been very helpful to me as I have been setting up my system. My repeater system is a Kenwood TKR-750 K2, Telewave TPRD-1556 duplexer set (6 cavities), A Telewave Isolator on the PA. Running 1/2 Heilax to a Andrew DB224E antenna. This a repeater at my home as I am on a small hill. The antenna is about 40 feet vertical and 60 feet horizontally from the repeater/office. It works very well but I have had intermod issue that rears its head now and then that sounds like rolling pipe or hollow sound. I am runing a PL on both TX and RX. This sound opens up the receiver even. So my tx pl is getting back into the system. I have hunted down many noise makers in the office that could have been helping out. One was the Linksys router. I am going to replace it anyway as it makes a ton of noise I found. Changing my network from 100 to 10 on the card speed also reduced the noise levels. Still I get the rolling pipe sound now and then and it leaves as fast as it shows up. If I use my other antenna a Diamond F22 also fed with 1/2 Heliax I also get the same result. I do use a preamp but it also seems to not change with or without it. I have even ran it so the receive antenna is alone and the transmit is the other (split). I still get the rolling pipes now and then. I do have a FM radio station on 92.1 about 4 miles from me that is known to have a sloppy signal. Could it be that this is mixing with my system and creating this? Looking at getting a DCI Band pass filter on the receiver side but I am not sure if that is just throwing more money at this project and not getting anywhere still. Just wanted to see if anyone had some ideas? Scott KB7DZR
Re: [Repeater-Builder] Astron RM-35M AGM charging abilities?
bil.i...@yahoo.com wrote: Let me put in my two cents worth. Feed the power Thru the NO contact of a relay. Connect the coil of the relay on the downside and the relay will drop out and kill the power to the radio and the coil before the battery is dead. A reset switch across the contacts will start the system. Assuming the rats at the repeater site are nice enough to hit the switch when the power comes back on. Otherwise for unattended sites you'll need a bit more sophistication. Matthew Kaufman Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * Your email settings: Individual Email | Traditional * To change settings online go to: http://groups.yahoo.com/group/Repeater-Builder/join (Yahoo! ID required) * To change settings via email: repeater-builder-dig...@yahoogroups.com repeater-builder-fullfeatu...@yahoogroups.com * To unsubscribe from this group, send an email to: repeater-builder-unsubscr...@yahoogroups.com * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Sd174 uhf
In that case use a single notch cavity to remove the 473 frequency in question. Circulators can be used in conjunction with shorted stubs and cavities to create super narrow notch filters, but this may be more than you need. http://books.google.com/books?id=trJ6rhF0lU0Cpg=PA122dq=circulator+notch+filter#v=onepageq=circulator%20notch%20filterf=false On Mon, Dec 7, 2009 at 5:21 PM, Ian Wells kerin...@pacific.net.au wrote: How would a circulator or isolator work .The transmitt signal from the data radio could pass through to the antenna and the rx signal could be received from the antenna and The signal you wish to remove from the data radio radio on receive could be notched to the dummy load . The data radio radio frequencies are set for 507.025mhz rx 517.025mhz TX and the frequency that is interfering is on 473.200mhz. Thank You ,Ian Wells Kerinvale Comaudio, 361 Camboon road, Biloela.4715 Ph 0749922449 Mb 0409159932 Hm 0749922574 Fx 0749922767 www.kerinvalecomaudio.com.au *---Original Message---* *From:* DCFluX dcf...@gmail.com *Date:* 8/12/2009 11:08:15 AM *To:* Repeater-Builder@yahoogroups.com *Subject:* Re: [Repeater-Builder] Sd174 uhf depends on the quality of the filter. I would try using the coax stub routine with RG-58 as the coax, that should be fairly wide. But look at it on a spectrum analyzer to be sure it will pass both signals. If not try building a 3-5 pole interdigital BPF. Those can tune 10MHz wide easy. On Mon, Dec 7, 2009 at 4:57 PM, Ian Wells kerin...@pacific.net.au wrote: Our TX and rx frequencies are 10 meg apart so a band pass filter may have problems giving good signal on both or should I tune the filter in the middle of the two frequencies Thank You ,Ian Wells Kerinvale Comaudio, 361 Camboon road, Biloela.4715 Ph 0749922449 Mb 0409159932 Hm 0749922574 Fx 0749922767 www.kerinvalecomaudio.com.au *---Original Message---* *From:* DCFluX dcf...@gmail.com *Date:* 8/12/2009 10:53:00 AM *To:* Repeater-Builder@yahoogroups.com *Subject:* Re: [Repeater-Builder] Sd174 uhf The lack of a front end comes to mind. You basicly got there a hand held in a pretty box with a DB-9. Try adding a bandpass filter, such as a bandpass cavity, shorted coaxial stub or a interdigital bandpass filter. On Mon, Dec 7, 2009 at 3:42 PM, kerinvale kerin...@pacific.net.au wrote: Hi guys .I have a SD 174 maxon data radio and it seems to not be able filter other transmitters near by .The receiver opens up with squark noise even when programmed with ctcss .can anyone suggest whats possibly the problem is and possible fixes.I have one on site and it seems to be working perfectly but I know of two that are the same carn't filter signals nearby Thank You, Ian Wells, Kerinvale Comaudio, 361 Camboon Road.Biloela.4715 Ph 0749922449 or 0409159932 or 0749922574 www.kerinvalecomaudio.com.au .
Re: [Repeater-Builder] Sd174 uhf
Can one side of a 6mc450s diplexer be used as I have a few of them laying around .The first test I tried worked well with a 6mc450s with no interference but the 174 lost a lot of its TX power through it .from 3 watt it reduced it down to .5 watt .I can say I didn't have a 50 ohm terminator on the unused port which I should try next time and see how that's goes Thank You ,Ian Wells Kerinvale Comaudio, 361 Camboon road, Biloela.4715 Ph 0749922449 Mb 0409159932 Hm 0749922574 Fx 0749922767 www.kerinvalecomaudio.com.au ---Original Message--- From: DCFluX Date: 8/12/2009 11:51:22 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Sd174 uhf In that case use a single notch cavity to remove the 473 frequency in question. Circulators can be used in conjunction with shorted stubs and cavities to create super narrow notch filters, but this may be more than you need. http://books.google com/books?id=trJ6rhF0lU0Cpg=PA122dq=circulator+notch+filter#v=onepageq=cir ulator%20notch%20filterf=false On Mon, Dec 7, 2009 at 5:21 PM, Ian Wells kerin...@pacific.net.au wrote: How would a circulator or isolator work .The transmitt signal from the data radio could pass through to the antenna and the rx signal could be received from the antenna and The signal you wish to remove from the data radio radio on receive could be notched to the dummy load . The data radio radio frequencies are set for 507.025mhz rx 517.025mhz TX and the frequency that is interfering is on 473.200mhz. Thank You ,Ian Wells Kerinvale Comaudio, 361 Camboon road, Biloela.4715 Ph 0749922449 Mb 0409159932 Hm 0749922574 Fx 0749922767 www.kerinvalecomaudio.com.au ---Original Message--- From: DCFluX Date: 8/12/2009 11:08:15 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Sd174 uhf depends on the quality of the filter. I would try using the coax stub routine with RG-58 as the coax, that should be fairly wide. But look at it on a spectrum analyzer to be sure it will pass both signals. If not try building a 3-5 pole interdigital BPF. Those can tune 10MHz wide easy. On Mon, Dec 7, 2009 at 4:57 PM, Ian Wells kerin...@pacific.net.au wrote: Our TX and rx frequencies are 10 meg apart so a band pass filter may have problems giving good signal on both or should I tune the filter in the middle of the two frequencies Thank You ,Ian Wells Kerinvale Comaudio, 361 Camboon road, Biloela.4715 Ph 0749922449 Mb 0409159932 Hm 0749922574 Fx 0749922767 www.kerinvalecomaudio.com.au ---Original Message--- From: DCFluX Date: 8/12/2009 10:53:00 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Sd174 uhf The lack of a front end comes to mind. You basicly got there a hand held in a pretty box with a DB-9. Try adding a bandpass filter, such as a bandpass cavity, shorted coaxial stub or a interdigital bandpass filter. On Mon, Dec 7, 2009 at 3:42 PM, kerinvale kerin...@pacific.net.au wrote: Hi guys .I have a SD 174 maxon data radio and it seems to not be able filter other transmitters near by .The receiver opens up with squark noise even when programmed with ctcss .can anyone suggest whats possibly the problem is and possible fixes.I have one on site and it seems to be working perfectly but I know of two that are the same carn't filter signals nearby Thank You, Ian Wells, Kerinvale Comaudio, 361 Camboon Road.Biloela.4715 Ph 0749922449 or 0409159932 or 0749922574 www.kerinvalecomaudio.com.au . faint_grain.jpg
Re: [Repeater-Builder] MAxtrac Help please
The maxtrac radios placed a DC voltage on the mic hi wire. If you do not see that voltage, the mic will not work. Now there is a possibility that the maxtrac may switch that voltage on and off along with the PTT (TX on and off) but I don't recall that being the case when I had the maxtracs. So far as model numbers on the maxtrac DTMF mics, I do not know any of them; despite having had a few across the years. KC5DBH Matt From: w7nikw7nik w7...@sbcglobal.net To: Repeater-Builder@yahoogroups.com Sent: Mon, December 7, 2009 12:18:29 AM Subject: [Repeater-Builder] MAxtrac Help please Has anyone rewired the pin out on a Motorola DTMF mic model hmn3013a to a maxtrac 300 . I do not see voltage out the mic jack , this might be a problem . Any help would be great I can get different dtmf mic , but i don't know what model to get . Yahoo! Groups Links
[Repeater-Builder] Re: Rolling Pipe Sound
Eric Thanks, I have had great service from Telwave. They were very helpful for newbie. Thanks for all the tips and ideas everyone. It took me on a yet one more of many sniffing runs with my ht and about 10 feet of coax with about 2 of the center exposed so I could really sniff close. Well I really think (HOPE) I found it maybe. Right spot on the input I can get a sound that kind of fits the sound I have been getting. I have my full weather station here as many folks use it including the weather service. It updated on the web ect. Well its a wired Davis weather station, so all the wires going to all the sensors work well as a antenna. After some close hunting it will fully open the Ht's squelch right on the input. it is coming from the one line I did not have a bead on. Its the main data line to the computer system that then records and sends it out to my web page. Now with a snap on bead on it I only get it to open up right at the side of the snap on bead that is running into the weather station. So I put one on each end and that really weakend the signal. It still present but you have be right on it. This just may be it as I have shut down everything but the weather station and it was unplugged from the power but it has a 9 volt backup battery in it. We will see, I have claimed victory too early before with this noise. So the next test is wait and see. By the way the DB224E Antenna is one very nice system its really woke up this repeater. I got it installed just about 2 weeks ago and switched off the backup antenna the diamond F22, its a good antenna but not for full time repeater service compared to the DB224E Scott KB7DZR --- In Repeater-Builder@yahoogroups.com, Eric Lemmon wb6...@... wrote: Scott, One source is Telewave. Here are the datasheets for the 5 and 8 bandpass cavity filters: www.telewave.com/pdf/TWDS-5021.pdf www.telewave.com/pdf/TWDS-5031.pdf With the 30% Amateur discount, the 5 cavity will cost you about $231 plus shipping, and the 8 cavity is about $100 more. Other sources are Comprod, EMR, TX-RX, and Andrew. Some brands may require purchase through a distributor, such as Tessco, Hutton, or Talley. Always ask about a Ham discount when you are negotiating prices. Depending upon the size of your order, you may get 25% or 30%. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of offtracks1 Sent: Monday, December 07, 2009 3:56 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: Rolling Pipe Sound The router is right at 147.580 to almost 147.595. The repeater input is 147.600. So I plan to take that offline. All that cables are double shielded with no adapters ect. I do not have anything between the isolator and the duplexer. Where is a good dealer for a 5 or 8 band pass for the receiver? I may look at going with that for the first step as it is not very bad but a bugger that pops up now and then. Thanks for the help. Scott --- In Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com , Eric Lemmon wb6fly@ wrote: Scott, A likely suspect is a carrier being emitted by a nearby computer or microprocessor. A few years ago, I was setting up a GR1225 repeater on a VHF channel, and I noticed that the receive indicator LED was lit steadily. My spectrum analyzer revealed that there was a low-level but steady carrier a few kHz off from my receive frequency. I then used my T-Hunt equipment to pinpoint my desktop computer as the source. In the course of my investigation, I also found weak but benign carriers being emitted from my TV set, my idle microwave oven, and my programmable thermostat. If it is an intermod problem, perhaps a DCI filter is far too wide to be of much help. I'd strongly suggest putting a 5 or 8 bandpass cavity ahead of the receiver- it is much sharper than the DCI product. Do you have a second harmonic notch filter, or a low-pass filter, following the isolator? Are all of the jumper cables double-shielded, with proper connectors on each end- that is, no adapters or barrels? 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com [mailto:Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com ] On Behalf Of offtracks1 Sent: Monday, December 07, 2009 12:49 PM To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Subject: [Repeater-Builder] Rolling Pipe Sound Thanks for all the post and for the web site and group. It's been very helpful to me as I have been setting up my system. My repeater system is a Kenwood TKR-750 K2, Telewave TPRD-1556 duplexer set (6 cavities), A Telewave Isolator on the PA. Running 1/2 Heilax to a Andrew DB224E antenna. This a
RE: [Repeater-Builder] MAxtrac Help please
The answers are found in the Motorola Touch-Code Encoder Palm Microphone instruction manual 6881114E07, which is still available from Motorola Parts for about $3. It covers fifteen different DTMF mikes, including the HMN3013A used on the MaxTrac 800, and the HMN1037A used on the conventional MaxTrac. You can probably change the mike cord to make the 3013 look like the 1037. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of w7nikw7nik Sent: Sunday, December 06, 2009 10:18 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] MAxtrac Help please Has anyone rewired the pin out on a Motorola DTMF mic model hmn3013a to a maxtrac 300? I do not see voltage out the mic jack , this might be a problem . Any help would be great I can get different dtmf mic , but i don't know what model to get .
Re: [Repeater-Builder] Re: Rolling Pipe Sound
I don't think I've ever heard a rolling pipe sound over a repeater, although, once I had some interesting feedback from an SSB transmitter with FM receiver. Is there a good clean recording available? Kurt
Re: [Repeater-Builder] Programming a CAT1000
Thanks Mike, This is an older cat1000 and not the B model. I'm trying to short-cut this repair to get it off my bench but it looks like I'm going to have to dig into things. This is an older Spectrum Communications repeater with the CAT1000 controller. The original builder is long gone and there are many mods done with no documentation. A small repair favor for a club looks like it's going to be in my basement for awhile until I figure things out. 73, Joe, K1ike Mike Besemer (WM4B) wrote: Joe, Have you got a manual? If not, it's available on the CATAUTO website.
Re: [Repeater-Builder] Sd174 uhf
dont know that number, but sounds like a mobile style 6 cavity notch duplexer, try the other side if the insertion loss is too high going one way, and the opposite side should have a 50 ohm load on it On Mon, Dec 7, 2009 at 6:01 PM, Ian Wells kerin...@pacific.net.au wrote: Can one side of a 6mc450s diplexer be used as I have a few of them laying around .The first test I tried worked well with a 6mc450s with no interference but the 174 lost a lot of its TX power through it .from 3 watt it reduced it down to .5 watt .I can say I didn't have a 50 ohm terminator on the unused port which I should try next time and see how that's goes Thank You ,Ian Wells Kerinvale Comaudio, 361 Camboon road, Biloela.4715 Ph 0749922449 Mb 0409159932 Hm 0749922574 Fx 0749922767 www.kerinvalecomaudio.com.au *---Original Message---* *From:* DCFluX dcf...@gmail.com *Date:* 8/12/2009 11:51:22 AM *To:* Repeater-Builder@yahoogroups.com *Subject:* Re: [Repeater-Builder] Sd174 uhf In that case use a single notch cavity to remove the 473 frequency in question. Circulators can be used in conjunction with shorted stubs and cavities to create super narrow notch filters, but this may be more than you need. http://books.google.com/books?id=trJ6rhF0lU0Cpg=PA122dq=circulator+notch+filter#v=onepageq=circulator%20notch%20filterf=false On Mon, Dec 7, 2009 at 5:21 PM, Ian Wells kerin...@pacific.net.au wrote: How would a circulator or isolator work .The transmitt signal from the data radio could pass through to the antenna and the rx signal could be received from the antenna and The signal you wish to remove from the data radio radio on receive could be notched to the dummy load . The data radio radio frequencies are set for 507.025mhz rx 517.025mhz TX and the frequency that is interfering is on 473.200mhz. Thank You ,Ian Wells Kerinvale Comaudio, 361 Camboon road, Biloela.4715 Ph 0749922449 Mb 0409159932 Hm 0749922574 Fx 0749922767 www.kerinvalecomaudio.com.au *---Original Message---* *From:* DCFluX dcf...@gmail.com *Date:* 8/12/2009 11:08:15 AM *To:* Repeater-Builder@yahoogroups.com *Subject:* Re: [Repeater-Builder] Sd174 uhf depends on the quality of the filter. I would try using the coax stub routine with RG-58 as the coax, that should be fairly wide. But look at it on a spectrum analyzer to be sure it will pass both signals. If not try building a 3-5 pole interdigital BPF. Those can tune 10MHz wide easy. On Mon, Dec 7, 2009 at 4:57 PM, Ian Wells kerin...@pacific.net.au wrote: Our TX and rx frequencies are 10 meg apart so a band pass filter may have problems giving good signal on both or should I tune the filter in the middle of the two frequencies Thank You ,Ian Wells Kerinvale Comaudio, 361 Camboon road, Biloela.4715 Ph 0749922449 Mb 0409159932 Hm 0749922574 Fx 0749922767 www.kerinvalecomaudio.com.au *---Original Message---* *From:* DCFluX dcf...@gmail.com *Date:* 8/12/2009 10:53:00 AM *To:* Repeater-Builder@yahoogroups.com *Subject:* Re: [Repeater-Builder] Sd174 uhf The lack of a front end comes to mind. You basicly got there a hand held in a pretty box with a DB-9. Try adding a bandpass filter, such as a bandpass cavity, shorted coaxial stub or a interdigital bandpass filter. On Mon, Dec 7, 2009 at 3:42 PM, kerinvale kerin...@pacific.net.au wrote: Hi guys .I have a SD 174 maxon data radio and it seems to not be able filter other transmitters near by .The receiver opens up with squark noise even when programmed with ctcss .can anyone suggest whats possibly the problem is and possible fixes.I have one on site and it seems to be working perfectly but I know of two that are the same carn't filter signals nearby Thank You, Ian Wells, Kerinvale Comaudio, 361 Camboon Road.Biloela.4715 Ph 0749922449 or 0409159932 or 0749922574 www.kerinvalecomaudio.com.au .
Re: [Repeater-Builder] Sd174 uhf
Yep its a mobile style 6 pack notch .would it be best with a 50 ohm dummy load or 50 ohm terminator.I thought about tuning it with notch of 473.200 on the side we want to use (between the sd174 and antenna) and notch of 517.025 on the unused side (the side that goes to the dummy load) Thank You ,Ian Wells Kerinvale Comaudio, 361 Camboon road, Biloela.4715 Ph 0749922449 Mb 0409159932 Hm 0749922574 Fx 0749922767 www.kerinvalecomaudio.com.au ---Original Message--- From: DCFluX Date: 8/12/2009 12:59:08 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Sd174 uhf dont know that number, but sounds like a mobile style 6 cavity notch duplexer, try the other side if the insertion loss is too high going one way and the opposite side should have a 50 ohm load on it On Mon, Dec 7, 2009 at 6:01 PM, Ian Wells kerin...@pacific.net.au wrote: Can one side of a 6mc450s diplexer be used as I have a few of them laying around .The first test I tried worked well with a 6mc450s with no interference but the 174 lost a lot of its TX power through it .from 3 watt it reduced it down to .5 watt .I can say I didn't have a 50 ohm terminator on the unused port which I should try next time and see how that's goes Thank You ,Ian Wells Kerinvale Comaudio, 361 Camboon road, Biloela.4715 Ph 0749922449 Mb 0409159932 Hm 0749922574 Fx 0749922767 www.kerinvalecomaudio.com.au ---Original Message--- From: DCFluX Date: 8/12/2009 11:51:22 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Sd174 uhf In that case use a single notch cavity to remove the 473 frequency in question. Circulators can be used in conjunction with shorted stubs and cavities to create super narrow notch filters, but this may be more than you need. http://books.google com/books?id=trJ6rhF0lU0Cpg=PA122dq=circulator+notch+filter#v=onepageq=cir ulator%20notch%20filterf=false On Mon, Dec 7, 2009 at 5:21 PM, Ian Wells kerin...@pacific.net.au wrote: How would a circulator or isolator work .The transmitt signal from the data radio could pass through to the antenna and the rx signal could be received from the antenna and The signal you wish to remove from the data radio radio on receive could be notched to the dummy load . The data radio radio frequencies are set for 507.025mhz rx 517.025mhz TX and the frequency that is interfering is on 473.200mhz. Thank You ,Ian Wells Kerinvale Comaudio, 361 Camboon road, Biloela.4715 Ph 0749922449 Mb 0409159932 Hm 0749922574 Fx 0749922767 www.kerinvalecomaudio.com.au ---Original Message--- From: DCFluX Date: 8/12/2009 11:08:15 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Sd174 uhf depends on the quality of the filter. I would try using the coax stub routine with RG-58 as the coax, that should be fairly wide. But look at it on a spectrum analyzer to be sure it will pass both signals. If not try building a 3-5 pole interdigital BPF. Those can tune 10MHz wide easy. On Mon, Dec 7, 2009 at 4:57 PM, Ian Wells kerin...@pacific.net.au wrote: Our TX and rx frequencies are 10 meg apart so a band pass filter may have problems giving good signal on both or should I tune the filter in the middle of the two frequencies Thank You ,Ian Wells Kerinvale Comaudio, 361 Camboon road, Biloela.4715 Ph 0749922449 Mb 0409159932 Hm 0749922574 Fx 0749922767 www.kerinvalecomaudio.com.au ---Original Message--- From: DCFluX Date: 8/12/2009 10:53:00 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Sd174 uhf The lack of a front end comes to mind. You basicly got there a hand held in a pretty box with a DB-9. Try adding a bandpass filter, such as a bandpass cavity, shorted coaxial stub or a interdigital bandpass filter. On Mon, Dec 7, 2009 at 3:42 PM, kerinvale kerin...@pacific.net.au wrote: Hi guys .I have a SD 174 maxon data radio and it seems to not be able filter other transmitters near by .The receiver opens up with squark noise even when programmed with ctcss .can anyone suggest whats possibly the problem is and possible fixes.I have one on site and it seems to be working perfectly but I know of two that are the same carn't filter signals nearby Thank You, Ian Wells, Kerinvale Comaudio, 361 Camboon Road.Biloela.4715 Ph 0749922449 or 0409159932 or 0749922574 www.kerinvalecomaudio.com.au . faint_grain.jpg
RE: [Repeater-Builder] Programming a CAT1000
Good luck, Joe. I went through that drill a couple of years ago. I managed to get it all straightened out and documented, but it was quite a headache at the time. 73, Mike WM4B _ From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Joe Sent: Monday, December 07, 2009 8:52 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Programming a CAT1000 Thanks Mike, This is an older cat1000 and not the B model. I'm trying to short-cut this repair to get it off my bench but it looks like I'm going to have to dig into things. This is an older Spectrum Communications repeater with the CAT1000 controller. The original builder is long gone and there are many mods done with no documentation. A small repair favor for a club looks like it's going to be in my basement for awhile until I figure things out. 73, Joe, K1ike Mike Besemer (WM4B) wrote: Joe, Have you got a manual? If not, it's available on the CATAUTO website.
Re: [Repeater-Builder] Sd174 uhf
kerinvale wrote: Hi guys .I have a SD 174 maxon data radio and it seems to not be able filter other transmitters near by .The receiver opens up with squark noise even when programmed with ctcss .can anyone suggest whats possibly the problem is and possible fixes.I have one on site and it seems to be working perfectly but I know of two that are the same carn't filter signals nearby Likely intermod. I'm not familiar with that specific radio, but virtually all 'data radios' I've seen are basically handhelds in a box. So it will have a crummy rx...
[Repeater-Builder] Re: Rolling Pipe Sound
Do you have two FM stations in your area that are separated by 600 kc.? That will definitely do exactly what you describe. We had it on our repeater. I caught in one of your posts that your transmitter needs to be on for the problem to appear, so that's intermod causing your interference, not just a random carrier coming from a router or whatever device. The problem here was caused by an FM station on 89.9 about a mile away, and another one on 89.3 roughly six miles away, plus our transmitter on 147.06. A+B-C=D 147.06 + 89.9 - 89.3 = 147.66. The thing to watch for with FM broadcast intermod is the wide bandwidth of the intermod product. There was no interference until BOTH stations were quiet -- no modulation. Obviously, the instances of both being quiet simultaneously are quite random in length and occurrence, depending on the program material of each. I tracked the location of the mixing with the aid of a spectrum analyzer, which turned out to be safety cables threaded through the turnbuckles. Laryn K8TVZ
[Repeater-Builder] WTB Motorola VHF Quantar repeater
I am looking to buy a quantar in either vhf range...p-25 working condition. Willing to spend up to $1900.00. I heard there were some selling at $1800.00 but do not know where or who is selling. Thanks Bill in Atlanta 404 325-8992 jawjabillatl at bellsouth dott net . .
Re: [Repeater-Builder] Re: Rolling Pipe Sound
larynl2 wrote: Do you have two FM stations in your area that are separated by 600 kc.? That will definitely do exactly what you describe. We had it on our repeater. Or AM. Or an AM station ON 600 kc also.
Re: [Repeater-Builder] Sd174 uhf
A 50 ohm terminator should suffice, you may want to tune the terminated side to notch the TX frequency. On Mon, Dec 7, 2009 at 7:28 PM, Ian Wells kerin...@pacific.net.au wrote: Yep its a mobile style 6 pack notch .would it be best with a 50 ohm dummy load or 50 ohm terminator.I thought about tuning it with notch of 473.200 on the side we want to use (between the sd174 and antenna) and notch of 517.025 on the unused side (the side that goes to the dummy load) Thank You ,Ian Wells Kerinvale Comaudio, 361 Camboon road, Biloela.4715 Ph 0749922449 Mb 0409159932 Hm 0749922574 Fx 0749922767 www.kerinvalecomaudio.com.au *---Original Message---* *From:* DCFluX dcf...@gmail.com *Date:* 8/12/2009 12:59:08 PM *To:* Repeater-Builder@yahoogroups.com *Subject:* Re: [Repeater-Builder] Sd174 uhf dont know that number, but sounds like a mobile style 6 cavity notch duplexer, try the other side if the insertion loss is too high going one way, and the opposite side should have a 50 ohm load on it On Mon, Dec 7, 2009 at 6:01 PM, Ian Wells kerin...@pacific.net.au wrote: Can one side of a 6mc450s diplexer be used as I have a few of them laying around .The first test I tried worked well with a 6mc450s with no interference but the 174 lost a lot of its TX power through it .from 3 watt it reduced it down to .5 watt .I can say I didn't have a 50 ohm terminator on the unused port which I should try next time and see how that's goes Thank You ,Ian Wells Kerinvale Comaudio, 361 Camboon road, Biloela.4715 Ph 0749922449 Mb 0409159932 Hm 0749922574 Fx 0749922767 www.kerinvalecomaudio.com.au *---Original Message---* *From:* DCFluX dcf...@gmail.com *Date:* 8/12/2009 11:51:22 AM *To:* Repeater-Builder@yahoogroups.com *Subject:* Re: [Repeater-Builder] Sd174 uhf In that case use a single notch cavity to remove the 473 frequency in question. Circulators can be used in conjunction with shorted stubs and cavities to create super narrow notch filters, but this may be more than you need. http://books.google.com/books?id=trJ6rhF0lU0Cpg=PA122dq=circulator+notch+filter#v=onepageq=circulator%20notch%20filterf=false On Mon, Dec 7, 2009 at 5:21 PM, Ian Wells kerin...@pacific.net.au wrote: How would a circulator or isolator work .The transmitt signal from the data radio could pass through to the antenna and the rx signal could be received from the antenna and The signal you wish to remove from the data radio radio on receive could be notched to the dummy load . The data radio radio frequencies are set for 507.025mhz rx 517.025mhz TX and the frequency that is interfering is on 473.200mhz. Thank You ,Ian Wells Kerinvale Comaudio, 361 Camboon road, Biloela.4715 Ph 0749922449 Mb 0409159932 Hm 0749922574 Fx 0749922767 www.kerinvalecomaudio.com.au *---Original Message---* *From:* DCFluX dcf...@gmail.com *Date:* 8/12/2009 11:08:15 AM *To:* Repeater-Builder@yahoogroups.com *Subject:* Re: [Repeater-Builder] Sd174 uhf depends on the quality of the filter. I would try using the coax stub routine with RG-58 as the coax, that should be fairly wide. But look at it on a spectrum analyzer to be sure it will pass both signals. If not try building a 3-5 pole interdigital BPF. Those can tune 10MHz wide easy. On Mon, Dec 7, 2009 at 4:57 PM, Ian Wells kerin...@pacific.net.au wrote: Our TX and rx frequencies are 10 meg apart so a band pass filter may have problems giving good signal on both or should I tune the filter in the middle of the two frequencies Thank You ,Ian Wells Kerinvale Comaudio, 361 Camboon road, Biloela.4715 Ph 0749922449 Mb 0409159932 Hm 0749922574 Fx 0749922767 www.kerinvalecomaudio.com.au *---Original Message---* *From:* DCFluX dcf...@gmail.com *Date:* 8/12/2009 10:53:00 AM *To:* Repeater-Builder@yahoogroups.com *Subject:* Re: [Repeater-Builder] Sd174 uhf The lack of a front end comes to mind. You basicly got there a hand held in a pretty box with a DB-9. Try adding a bandpass filter, such as a bandpass cavity, shorted coaxial stub or a interdigital bandpass filter. On Mon, Dec 7, 2009 at 3:42 PM, kerinvale kerin...@pacific.net.au wrote: Hi guys .I have a SD 174 maxon data radio and it seems to not be able filter other transmitters near by .The receiver opens up with squark noise even when programmed with ctcss .can anyone suggest whats possibly the problem is and possible fixes.I have one on site and it seems to be working perfectly but I know of two that are the same carn't filter signals nearby Thank You, Ian Wells, Kerinvale Comaudio, 361 Camboon Road.Biloela.4715 Ph 0749922449 or 0409159932 or 0749922574 www.kerinvalecomaudio.com.au .
[Repeater-Builder] Re: 406-420 MHz Radios
Ted, Thanks for the offer. I am going to have to pass on the Mostar. I have been trying to keep as much of the equipment between sites the same as possible. We are pretty well familiar with the Micor and Mitrek series of radios and I think we want to stick with those if at all possible. I may be needing some more reeds and channel elements though, so I will keep you in mind for those. Thanks, Joe - WA7JAW --- In Repeater-Builder@yahoogroups.com, Ted Bleiman K9MDM - MDM Radio k9...@... wrote: joe i have a mostar 406-430 if that'll do you any good works with mike (I'm pretty sure) $50 + post (it'll ship priority) mdm ted
Re: [Repeater-Builder] Re: Rolling Pipe Sound
Nasssty. Evil IM. Nice find. Nate WY0X On Dec 7, 2009, at 8:49 PM, larynl2 wrote: Do you have two FM stations in your area that are separated by 600 kc.? That will definitely do exactly what you describe. We had it on our repeater. I caught in one of your posts that your transmitter needs to be on for the problem to appear, so that's intermod causing your interference, not just a random carrier coming from a router or whatever device. The problem here was caused by an FM station on 89.9 about a mile away, and another one on 89.3 roughly six miles away, plus our transmitter on 147.06. A+B-C=D 147.06 + 89.9 - 89.3 = 147.66. The thing to watch for with FM broadcast intermod is the wide bandwidth of the intermod product. There was no interference until BOTH stations were quiet -- no modulation. Obviously, the instances of both being quiet simultaneously are quite random in length and occurrence, depending on the program material of each. I tracked the location of the mixing with the aid of a spectrum analyzer, which turned out to be safety cables threaded through the turnbuckles. Laryn K8TVZ
