I guess it depends on what you would call 'better'. I know this circuit works, and it uses the stockpile of 4011 chips I bought at a sidewalk sale in Dallas back in the '70s from left over TI testing. I don't know what kind of tests were run on them, but I have not found a bad one, and have had them in service as CW ID oscillators, audio gates, bubble up 'beep' generators (including timing) and squelch tail timers for many years now. Going out and buying a different chip when I already have something that works kinda violates the KISS principle, which I very much subscribe to - HI.
73 - Jim W5ZIT --- [EMAIL PROTECTED] wrote: > Would quad bilateral switches like a CMOS 4066 > better for switching the audio lines? > > Dave WB2FTX > > ----- Original Message ----- > From: [EMAIL PROTECTED] > Date: Friday, November 23, 2007 11:35 am > Subject: Re: [Repeater-Builder] 2x RX's or 2x TX's > on one Controller Port > To: [email protected] > > > At 11/23/2007 03:12, you wrote: > > > > >Kevin, here is a circuit that I have used several > > >times to combine a control receiver with the main > > >receiver in a repeater controller. It can be used > to > > >provide a second frequency port to a repeater > system > > >with one port having precidence over the other, > ie > > >when one port has a signal, the other port is > > >inhibited. > > > > How much distortion do you get using those 4011 > NAND gates as > > audio amps? > > > > Bob NO6B > > > > > ____________________________________________________________________________________ Never miss a thing. Make Yahoo your home page. http://www.yahoo.com/r/hs
