Thus spake Mike (erazmus@WANTREE.COM.AU): > My CTX1760 makes a click sound when it changes frequency - is this a > set of reed relays ? Don't know if they're reed relays or not, but most modern multisync monitors do use relays to switch the scanning circuitry to accomodate the very wide range of scan rates. Clyde -- Clyde Smith-Stubbs | HI-TECH Software, | Voice: +61 7 3354 2411 clyde@htsoft.com | P.O. Box 103, Alderley, | Fax: +61 7 3354 2422 http://www.htsoft.com | QLD, 4051, AUSTRALIA. | --------------------------------------------------------------------------- Download a FREE beta version of our new ANSI C compiler for the PIC microcontroller! Point your WWW browser at http://www.htsoft.com/