You might also want to consider the approach shown in the article on p 76 in the November 2008 issue of QST where a boost regulator has been placed in line...This will allow the equipment to still see 13.5 to 13.8 volts even where the battery has discharged below the 12 volt level.
73 Dave WB2FTX ----- Original Message ----- From: ka9qjg To: [email protected] Sent: Sunday, October 19, 2008 10:29 PM Subject: [Repeater-Builder] Shutting Down Battery Back up I have a Astron 60 Amp Power supply with the battery back up option it works Great I have it Fused. However in the Testing I noticed that on Battery Back up I only loose about 10 Watts that is fine, But as the Battery drains down the Repeater gets Distorted and of Course this is normal too Because of the input Voltage getting Lower , Now the question and I have not seen this talked about I would assume all I would need is a Normally closed Relay and as the Voltage dropped below a Certain Level it would open and just break the connection to the Battery back up , Is this the way to do it Thanks Don KA9QJG ------------------------------------------------------------------------------ No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.173 / Virus Database: 270.8.1/1734 - Release Date: 10/20/2008 7:25 AM
