Hook that signal to the base of the transistor through a 10K or so resistor. That should provide enough isolation to prevent loading of the signal. I hope it's going positive when the squelch is open so your COS will be low when active.
de WD7F John in Tucson ----- Original Message ----- From: "jkstrsn" <[EMAIL PROTECTED]> To: <Repeater-Builder@yahoogroups.com> Sent: Saturday, January 20, 2007 7:40 AM Subject: [Repeater-Builder] Re: COS output for Kenwood > Jim, thanks for the suggestion. Unfortunately it doesn't have a > receive LED, only a bar-graph which is also used for transmitting. > > The optoisolator idea has merit though. I have located a point in the > radio which changes voltage, but only by about 1/2 V and it is very > sensitive to loading. So far I've tried one transistor but it loads it > too much I guess. > > I'm going to try again later this morning, I either need to find a > point that switches more voltage or maybe try a fet or something so as > not to load the other one? > > Again, thanks, any other ideas are welcome. > > Jeff > > > > > > > Yahoo! Groups Links > > > > > > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.5.432 / Virus Database: 268.17.2/641 - Release Date: 1/20/2007 10:24 AM > >
