Hi Ken, that is what I would have thought as well. When the squelch is closed, it has about 7 volts on the point, when the squelch is open, it goes low to about .5 volts. The radio that I am using is a Uniden AMU 080K radio. I will have to work with it again this weekend when the RLC2 gets here. So let me see if what you are saying is take the point that I have, which I know works on my CSI Phone patch, connect (start) with a 10K resistor, the part I am lost at is the ground. When you say a pull down resistor, is this any different than a standard 1/2 watt resistor? I appreciate the input here, glad that someone is willing to help.
Mathew ----- Original Message ----- From: "Ken Arck" <[EMAIL PROTECTED]> To: <Repeater-Builder@yahoogroups.com> Sent: Tuesday, March 30, 2004 9:13 AM Subject: Re: [Repeater-Builder] WTB: 440 Mhz Receiver with COR > At 09:07 AM 3/30/2004 -0800, you wrote: > >The voltage at the tap point is about 7 volts, when keyed it drops to about > >.5 volts, just not enough to get it to key the controller. I looked for > >other sources in the radio, nothing would drop to zero volts. > > <---I'm surprised your controller doesn't recognize .5 volts as a logic > low. Actually the chances of finding a point in the receiver that drops to > exactly zero is pretty slim, as a bipolar transistor which is full > saturated, will still have a .6 volt drop across it. > > What you could try is a pull down resistor (from the COS wire connected to > the controller to ground) and see if you can pull the low level down enough > for the controller to recognize. You might start with a 10K and work your > way down. Of course if the squelch in the radio stops working, you've > probably gone too low a value :-) > > Ken > -------------------------------------------------------------------------- ---- > President and CTO - Arcom Communications > Makers of state-of-the-art repeater controllers and accessories. > http://www.ah6le.net/arcom/index.html > AH6LE/R - IRLP Node 3000 > http://www.irlp.net > > > > > > Yahoo! Groups Links > > > > > Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
