On Sat, 15 Oct 2011 23:53:14 +0100, Nigel A. Gunn, W8IFF/G8IFF wrote: >It doesn't. >The SCR is for OVERVOLTAGE protection.
Ron is correct. If you have a look at the schematic, you will see that the PS-7 is not a "straight out of 723 data sheet" design. The overcurrent shutdown is somewhat more complicated than the simple crowbar on the output, and takes some thought to see how it operates, but it works and is pretty cool once you figure it out. 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 [email protected] http://mailman.zerobeat.net/mailman/listinfo/drakelist
