Jim, I performed load tests on many different power supplies, including the ferroresonant supplies common to Motorola and GE stations. The results are posted in the Power Supplies folder in the Files section of the Repeater-Builder Group.
As shown by the efficiency numbers, switchers are far more economical to operate than linear or ferroresonant supplies- especially at the low current draw in standby mode. Indeed, some busy mountaintop repeater sites are heated solely by the waste heat produced by vintage power supplies. If you're paying for power at your repeater site, your "clunker" power supply is costing you a chunk of change. 73, Eric Lemmon WB6FLY -----Original Message----- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of James Sent: Saturday, February 27, 2010 9:56 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Micor Stock Power Supplies I have been following the 9.6 Volt Micor Voltage information. One post indicated that if one were to replace the Stock MICOR Supply with a switcher and add the 9.6 Volt circuit, the monthly electric bill to run the repeater could be significantly reduced. Is this due to the fact that the switcher, in the standby mode, draws much less current and therefore cost less to operate or is it this combined with efficiently when the repeater is in operation. I have stock MICOR and MASTR II Supplies and would like your expertise on the merits of replacing them with one large switcher or a couple switchers. As always thanks in advance for your input and sharing your experiences with us. 73 JIM KA2AJH Wellsville, N.Y.
