Mathew, The Motorola TPN1110B power supply is rated at 25 amperes continuous, but will supply up to 35 amperes before losing regulation. It is designed to supply MICOR 100-watt continuous-duty stations, so it should be fine in your application. What make and model repeater do you have, and what power amplifier are you using?
The ammeter on Astron power supplies is usually sampling the voltage drop across just one of the several emitter ballast resistors, and therefore is not a precision current reading. If you can lay your hands on a 50 ampere 50 millivolt shunt, you can use a good digital multimeter to read the millivolt drop, which is equivalent to amperes. 73, Eric Lemmon WB6FLY -----Original Message----- From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of n9lv Sent: Sunday, April 08, 2007 3:58 PM To: [email protected] Subject: [Repeater-Builder] Motorola TPN1110B Power Supply question I was just given a Motorola TPN1110B 25 amp power supply for use on the repeater. Currently I have a Astron 70 amp power supply online. When the repeater is keyed up, the meter shows a current draw of right at 25 amps. Will this power supply handle full duty cycle at 25 amps, or is it a 20 amp with 25 amp surge? There is nothing wrong with the Astron, just would much rather have a rack mounted power supply. Thanks. Mathew
