JohnSwenson;586419 Wrote: > The chokes that one sees in PS designs are usually tiny little RF > chokes, they are designed to work at MHz ranges. They do nothing at > line frequencies. The ones I'm talking about are designed for line > frequency (120 or 100Hz). Thats takes a big iron core and a lot of > wire. The one speced in this design weighs several pounds and fills up > your hand when you try and hold it. The choke is actually bigger than > the transformer. > > For measuring it I take a line voltage to 6V transformer, put a plug > (and fuse!) on the primary and a resistive divider on the the > secondary. Use a resistance that will draw a few mA, it doesn't need to > be a lot. I run this into a spectrum analyzer, but you can send it into > a line in of a soundcard and use FFT software. > > Look at the results when plugged into different sockets, with different > boxes plugged in. If using a soundcard it won't have enough bandwidth to > see the 150KHz stuff unfortunately but you can still see a lot of the > results of the current spikes. > > John S.
Ah - those chokes - like MF fit to some of their top-end gear... got it. -- Phil Leigh You want to see the signal path BEFORE it gets onto a CD/vinyl...it ain't what you'd call minimal... Touch(wired/XP) - TACT 2.2X (Linear PSU) + Good Vibrations S/W - MF Triplethreat(Audiocom full mods) - Linn 5103 - Aktiv 5.1 system (6x LK140's, ESPEK/TRIKAN/KATAN/SEIZMIK 10.5), Pekin Tuner, Townsend Supertweeters, Blue Jeans Digital,Kimber Speaker & Chord Interconnect cables Kitchen Boom, Outdoors: SB Radio, Harmony One remote for everything. ------------------------------------------------------------------------ Phil Leigh's Profile: http://forums.slimdevices.com/member.php?userid=85 View this thread: http://forums.slimdevices.com/showthread.php?t=82648 _______________________________________________ Touch mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/touch
