[Repeater-Builder] Slightly OT: How are folks taking audio from multiple mobile radios and outputting them to one speaker?
Hello Folks, I am wondering what people are doing these days with multiple two-way radios and scanners in their vehicle and then outputting it to one speaker in the vehicle? How are they isolating each radio? Thanks, Mike
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] 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] Astron RM-35M AGM charging abilities?
Howdy Folks, I am wondering if anyone has experience with the Astron RM-35M and it's 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] PIN 2 of J6 on a Motorola Maxtrac before or after PL decode circuit?
Hello All, On PIN 2 of J6 inside the Motorola Maxtrac you can grab the COR for the radio. However, does anyone know if this is before or after the PL decode off the radio? I.e, if I have PL decode configured on the radio, will this COR go low only when the correct PL is received or will it go low whenever audio is received? Thank you, Mike
[Repeater-Builder] RLC4, possible to make one port a priority over the others?
Howdy, Is it possible to configure a port to be a priority port over the other ports on the RLC4? So if for instance there is an active conversation occurring on port 1 but then someone keys up port 4, the audio from port 4 goes out the repeater while crow-barring the audio coming in on port 1. Is that possible? If so, how do I do it? 73's and thank you in advance, Mike KE6MRE
[Repeater-Builder] What's the point of the PL input on the RLC4?
Howdy, This may sound like a dumb question but I am stumped. On my RLC 4, I put in code 013 1 0 0 for port 1, PL low, COR low. So when my COR goes low, it keys up the transmitter, just like it should do. But how does the PL input help make this decision? If my PL input is low or high, the COR is able to key up the transmitter, regardless of the state of the PL input. What I want it to do is not key up the transmitter UNLESS it sees a LOW on BOTH PL and COR. Is this possible? Thanks, Mike
[Repeater-Builder] Spectra acc pin #9 a COR?
Howdy All, So I am trying to get a COR out of the Spectra A5. Would pin #9 be the best way of getting it? Thanks, Mike
[Repeater-Builder] TK-790 9-pin pinout on back of unit?
Howdy, Anyone have the pinouts of the 9-pin molex connector on the back of the Kenwood TK-790? Thanks, Mike
Re: [Repeater-Builder] 900 MHz WISP on repeater tower?
Find out what gear they are using. Make sure it's FCC certified. If you have a spectrum analyzer, or have access to one, have them fire up the gear and make sure it doesn't have any spurious spikes within the 440 and 2m ham band. -Mike On Wed, Jan 21, 2009 at 1:34 PM, Paul N1BUG paul_n1...@verizon.net wrote: I could use a little help here. I have a repeater tower with 2 meter and 440 repeater on it. I have been contacted by a wireless internet service provider about putting some 900 MHz stuff on my tower. The deal they are offering is attractive but I'm wondering if there would be interference issues between their stuff and my repeaters. I'm going to be setting up a meeting to discuss technical aspects of the proposed system, but I have no experience or knowledge in this area and am not sure what questions I should be asking them. Any suggestions or advice? Thanks! Paul N1BUG
Re: [Repeater-Builder] Re: power cables needed
I have a bunch. How many would you like? 73's, Mike, KE6MRE On Sat, Aug 2, 2008 at 4:11 PM, Mike Dietrich [EMAIL PROTECTED] wrote: Hi, Does anybody have any extra A+ power cables for Motorola T83/T84 Spectra high power radios, for a couple of ham project radios i picked up? Cut-offs or complete. Don't need fuse holders or fuses. Thanks, Mike
[Repeater-Builder] MCS2000 intermittent transmit?
Howdy, Has anyone ever seen an intermittent transmit issue with an MCS2000? When I key up, it will key the transmitter for about one second then drop and then key up again and drop and then key up again until I let go of the PTT. I have tried using two differrent heads with the same issue and I don't get any error codes when I turn the unit on and it does it's self test. I made sure the their is no timeout timer defined in the CPS. Anything I can do to adjust it in the tuner software? Any help would be appreciated. Thanks, Mike
[Repeater-Builder] Where to pickup fixed-audio on an MCS2000?
Anyone have any idea where I can pickup fixed audio after the squelch output but before it makes it to the speaker amplifier? Thanks, Mike
[Repeater-Builder] NEEDED: Kenwood KCT-23A-K2 Power cable
Anyone have one they are willing to part with? Thanks, Mike
[Repeater-Builder] WANTED: Motorola HLN6412A MCS2000 Acc. connector...
Howdy, I need a few of the HLN6412A MCS2000 DB25 accessory connectors. OR, the crimp pins that snap into it. I figured I would ask here before I call motorola and order some. Any help would be appreciated. Thank You, mike lyon
