[Repeater-Builder] BIG battery & Astron current limit

[Steve Grantham]

How long would the RS-35M run in current limit at 34 Amps?  (This is about 97%.)   I have noticed that the internal ammeter sometimes lacks good calibration.  As measured on a quality manufactured shunt, 34 Amps pegs out the panel ammeter on the RS-35M, which indicates 40 Amps Max.   Anyone have experience with this?   Steve AA5SG   The below quoted from: http://www.repeater-builder.com/astron/astron-rsbattmod.html A couple of additional comments presented by  Joe Montierth .... One, the 10K resistor can be 1/4 watt or even 1/8 watt, the 1/2 watt is overkill. There is not much voltage across it to generate any heat. Two, depending on the size battery it is attached to, you might want to reduce the current limit point on the Astron. The 35 amp Astron will current limit somewhat above the 35 amp point, maybe around 37-39 amps. If you have it attached to a BIG battery, it can run several hours at the current limit, and burn itself out. If you parallel R4 with a 1K pot, you can adjust the current limit to a point less than 38 amps, usually about 70-80% of the power supply rating is good. Three, always turn the PS "on" before attaching it to the battery. This will keep the internal caps charged up, so they don't have to suddenly charge through the pass transistors on the Astron. 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 the Yahoo! Terms of Service.