Hi John, I doubt that the problem lies in the controller, but rather your 'modulator' isn't flat. If you scope the audio path, you should be able to make sure that you don't have excessive roll-off or distortion in the audio chain.
My suggestion is to change the exciter to provide True FM. This can be done by adapting a Mastr II PLL ICOM and installing it into the MVP. The AP-50 is a nice solution to feeding discriminator audio to the FM ICOM. While this article isn't written around the MVP, it can be generically followed to do what I have explained: <http://www.repeater-builder.com/ge/mastrII/ap-50-fm-mastr2.html> If I were doing this, I would feed Vol/Sq high to the AP-50 *and* the controller, using a simple resistive splitter. Have the controller there to do all of your necessary functions for control, but not run the audio through the controller to be repeated. I would modify the controller so it couldn't pass audio, by removing the gate transistor. This will allow you to feed audio to the controller for processing of tone commands. The AP-50 would take Vol/Sq high and feed it directly to the FM ICOM. Set the AP-50 so it doesn't de-emphasize, or pre-emphasize the audio. Take the audio output of the controller and feed it to the CTCSS port of the AP-50 so the responses of the controller can be heard. This will insure that the audio is not muted and the least amount of *stuff* exists in the audio path, but still having the necessities. Kevin John Everson wrote: > Hello to the group. > > I am building a 3 channel voting system for a local repeater group > and I was wondering what the rest of the world is using as a > interface for the voting reciever/transmitter package. How are you > configuring your pl? I have built up some MVPs and that part was a > slam dunk. I have purchased an ICS Basic that I have installed in one > of the MVPs but I am not getting the results I was hoping for. It > does not seem to pass the pl as I thought it would. I have the de- > emphasis cap pulled, and I am feeding the CG Hi line on the exciter, > (don't have a cow, I am going to use a limiter before I install the > package) ;-) but the audio seems to sound a bit funny, and it doesn't > want to pass the pl properly as it is intermittent at best. I know > that many use nothing more than an audio interface with a cos to ptt > linkup but I wanted some control over these things as well as an > ID'er if they are going to be 75 miles away so I opted for a > controller. > > So, the question is, what are you folks using? What say ye? > > Thanks in advance. > > John ab6li > > > > > > > > > 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/
