Re: [Repeater-Builder] battery backup board for micor power supply?
got a brand new still in the box Motorola Micor power supply for repeater with battery back up hook up also 2nd one on a repeater. send me email if you need a price. - Original Message - From: Kevin Berlen, K9HX To: Repeater-Builder@yahoogroups.com Sent: Monday, February 25, 2008 9:35 PM Subject: Re: [Repeater-Builder] battery backup board for micor power supply? You are looking for a TPN-1106 power supply. There is no battery back-up option for the TPN-1110 PS. Hope this helps, and 73, Kevin, K9HX At 06:26 PM 2/24/2008, you wrote: Is there such a beast? What is the number for that? I have a TPN1110B power supply. Thanks, Robert No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.21.0/1296 - Release Date: 2/24/2008 12:19 PM -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.21.1/1297 - Release Date: 2/25/2008 9:22 AM
Re: [Repeater-Builder] battery backup board for micor power supply?
There is none that I know of. The battery backup option was usually provided in the power supply, NOT the station chassis itself. On several that I have done that need battery backup, I have attached a 7809 9V regulator with a 1N4001 diode in series with the ground terminal to boost the voltage to around 9.6V. I have often thought of building this onto a card that would plug into one of the card slots, but I never had the time. This would create a situation like the GE station's 10V regulator card. Scott Scott Zimmerman Amateur Radio Call N3XCC 474 Barnett Road Boswell, PA 15531 - Original Message - From: georgiaskywarn [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Sunday, February 24, 2008 6:26 PM Subject: [Repeater-Builder] battery backup board for micor power supply? Is there such a beast? What is the number for that? I have a TPN1110B power supply. Thanks, Robert Yahoo! Groups Links -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.21.0/1296 - Release Date: 2/24/2008 12:19 PM
RE: [Repeater-Builder] Battery backup
At 1/9/2007 20:52, you wrote: Danny, If your power supply has any kind of crowbar device in its output circuitry, it is a good idea to have a Schottky diode (not a regular silicon diode) between the power supply and the battery, with the radio connected directly at the battery. This will prevent the power supply from placing a dead short on the battery when a power line spike causes the crowbar to fire. Most Astron linear power supplies have such a circuit. It's also a good idea to have fuses in each power lead and in each jumper between batteries. Better yet, just put a fuse right at the battery. If the crowbar fires, the fuse blows. Required equipment on any battery I use. Bob NO6B
Re: [Repeater-Builder] Battery backup
what equipment are you using now? astron makes a automatic switch (it automagicly switches from AC to DC with loss of AC) there are a couple other makers, I'm sure. you'll also have to consider battery charger(s) too. wm5c [EMAIL PROTECTED] wrote: Hi, New member here. Thanks for allowing me to join. Our club has acquired some large lead-acid 12v batteries we would like to use to back up our repeater in emergency situations. Does anyone know of a good (but simple and inexpensive [we are a very small group in a very small town]) circuit to accomplish this? Any input would be appreciated. Danny WM5C Heart Of Texas Ham Operators Group (HOTHOG) Brady, TX www.hothog.org __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
Re: [Repeater-Builder] Battery backup
A really simple circuit that I have used in a couple of repeaters uses three power diodes and a resistor. Select diodes that will carry the repeater load at about 50% of their rating. Place one diode in series with the power supply to the repeater. This one keeps the voltage from backing up into the power supply when power is being supplied from the battery. Next, place a power diode in series from the battery to the repeater. Then place a power diode in series with a 10 ohm power resistor (50 watts or so) from the power supply to the battery. This keeps the battery charged. The resistor limits the inrush current from the power supply in case the battery gets discharged. It also limits the maximum current the power supply has to deliver when bringing up a discharged battery. Adjust the voltage from the power supply to float the battery at 13.5 VDC, or as close to that value as possible. Do this after the batteries are charged and power is being supplied to the repeater from the power supply and not the battery. This will minimize electrolyte loss while providing a reasonable capacity from the batteries. Hope this helps - 73 - Jim W5ZIT -Original Message- From: [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Mon, 8 Jan 2007 9:31 PM Subject: [Repeater-Builder] Battery backup Hi, New member here. Thanks for allowing me to join. Our club has acquired some large lead-acid 12v batteries we would like to use to back up our repeater in emergency situations. Does anyone know of a good (but simple and inexpensive [we are a very small group in a very small town]) circuit to accomplish this? Any input would be appreciated. Danny WM5C Heart Of Texas Ham Operators Group (HOTHOG) Brady, TX www.hothog.org Check Out the new free AIM(R) Mail -- 2 GB of storage and industry-leading spam and email virus protection.
Re: [Repeater-Builder] Battery backup
At 07:31 PM 01/08/07, you wrote: Hi, New member here. Thanks for allowing me to join. Our club has acquired some large lead-acid 12v batteries we would like to use to back up our repeater in emergency situations. Does anyone know of a good (but simple and inexpensive [we are a very small group in a very small town]) circuit to accomplish this? Any input would be appreciated. Danny WM5C Heart Of Texas Ham Operators Group (HOTHOG) Brady, TX www.hothog.org Run the system off the battery, and use a top quality automatic charger to keep the battery up, and make sure the charger is fail safe. You don't need a failed charger boiling and cooking your expensive battery bank. A good reference is Home Power Magazine at www.homepower.com HPM is the bible of the off-the-power-grid community, and the web site has a wealth of information. Plus, they walk the walk as well as talk the talk - the entire magazine is produced with home-made electrical power, and it's edited and published by a ham. They simply do all the layout on computers, then zip up the layout files and email them to the printing / mailing house. They periodically package all the back issues for several years on a CD (one PDF file per monthly magazine). The CDs make searching for a topic easy. More information is on their web site. Another source is the RV community. Many of the tour-bus sized motor homes have 12v battery banks that are charged by a dedicated alternator off the main diesel engine, and some have a small generator that provides AC power when parked. Most have an automatic charger that can keep the battery up when plugged into what they call shore power (the term comes from the marine environment). So check out the RV supplier web sites. But take anything you read at a sales site with the proverbial grain of salt - google (and google groups) the manufacturer and model and see if anybody is complaining about it. Mike WA6ILQ
RE: [Repeater-Builder] Battery backup
Danny, If your batteries are flooded wet cells, as distinct from sealed (VRSLA or AGM) types, you should take care to vent them to the outdoors. Wet cell batteries also require regular monitoring for electrolyte levels and specific gravity. If your power supply has any kind of crowbar device in its output circuitry, it is a good idea to have a Schottky diode (not a regular silicon diode) between the power supply and the battery, with the radio connected directly at the battery. This will prevent the power supply from placing a dead short on the battery when a power line spike causes the crowbar to fire. Most Astron linear power supplies have such a circuit. It's also a good idea to have fuses in each power lead and in each jumper between batteries. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of wm5c Sent: Monday, January 08, 2007 7:31 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Battery backup Hi, New member here. Thanks for allowing me to join. Our club has acquired some large lead-acid 12v batteries we would like to use to back up our repeater in emergency situations. Does anyone know of a good (but simple and inexpensive [we are a very small group in a very small town]) circuit to accomplish this? Any input would be appreciated. Danny WM5C Heart Of Texas Ham Operators Group (HOTHOG) Brady, TX
Re: [Repeater-Builder] battery backup
At 01:09 PM 3/31/2005, David wrote: here is the problem i have a micor compustation repeater requires about 8amps at 120 volts 60 hrtz key down i have a tpn110b and tpn 1121a the TPN1110B is a 120 volt 60 hrtz input the TPN1121A is a 12 volt supply input choice one: build or find a ups to power the tpn1110b for 2 hours Efficiency would be VERY bad. choice two: buy an astron rs50 with the batter charger and float charge enough batteries to run the repeater for 2 hours. also build a low voltage shut off switch so when the batteries reach 10.5 volts the repeater shuts off. Go for #3. Use an astron linear, or current limited switching supply (cooler) adjusted to the battery's float voltage, and connect a deep cycle battery in parallel. You can use a relay, with a resistor in series with the coil, to set the dropout voltage. Short the resistor to pull in the relay and bring everything back online once power is restored, or even better, use a 110V relay to keep the resistor shorted when the input power is up. When AC fails, then the resistor is back inline, and when the voltage falls enough, then the relay disconnects the load. Or #4, a smart controller like an RC-210 could detect this condition at a programmable point, and inhibit transmit, switch power levels to conserve power, or simply pull it's own plug. Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
