I'm with Evan, Neil. Be certain you do this in a quiet environment. The instant you perform an increase and you hear a frying/crackling noise, BACK DOWN 'til you don't, and give it an hour or two at 5V or 10V lower than where the noise started. I actually had this non-destructively happen, and the device (I forget what) ultimately survived.
Ed Tanton website: http://www.n4xy.com <http://www.n4xy.com/> All emails <IN> & <OUT> checked by Norton AntiVirus with AutoProtect -------------------------------------------------- Wag more / Bark less -------------------------------------------------- ///snip Neil, I'm somewhat compulsive about such things. The older a rig is, or the longer it has set idle, the longer the "program" or process. In the worst case, I use 10 volts per hour increase. In other cases, I start with 10 volts per 15 minutes. My Variac has three meters---one for voltage, one for current, and one for power in watts. It is easy to see that when the ammeter increase at about the same amount as the voltage, you readily know there is a problem and not to proceed until fault isolation has been completed. 73, Evan, K9SQG ///snip
_______________________________________________ Drakelist mailing list [email protected] http://mailman.zerobeat.net/mailman/listinfo/drakelist
