On Fri, 9 Sep 2011 22:44:35 -0500, Don Cunningham wrote: >I am trying a thermistor from Mouser on my 516F2 power supply for the KWM2A >at the suggestion of a friend. I don't notice the "thump" on the >transformer anymore, so it may just be enough of a delay to help protect >switches, transformers, etc.
I've salvaged NTC thermistors out of dead PC power supplies, they usually seem appropriatly sized for linear loads up to a few hundred watts. Have one in my PS-7 and one in an AC-4. It tames the thumps nicely, and anyone who has a PS-7 knows that it has a monster thump. See here: http://zerobeat.net/drakelist/smf/index.php/topic,252.0.html 73, -Jim -- Ham Radio NU0C Lincoln, Nebraska, U.S.S.A. TR7/RV7/R7A/L7, TR6/RV6, T4XC/R4C/L4B, NCL2000, SB104A, R390A, GT550A/RV550A, HyGain 3750, IBM PS/2 - all vintage, all the time! "Give a man a URL, and he will learn for an hour; teach him to Google, and he will learn for a lifetime." HyGain 3750 User's Group - http://groups.yahoo.com/group/HyGain_3750/ http://incolor.inetnebr.com/jshorney http://www.nebraskaghosts.org _______________________________________________ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
