Using the Arcom RAD board, single delay for all inputs, hence needing to mix things. Not got those jumpers, it's the earlier RAD version. Jim
_____ From: [email protected] [mailto:[email protected]] On Behalf Of Jeff Ackerman Sent: 16 May 2010 09:09 To: [email protected] Subject: Re: [Repeater-Builder] Techniques for combining multiple audio sources what are you using? are Arcom? or Scom? If your using a arcom, take the jumper out of the delay board headers that jump the audio for each port, bring the audio out line (JP10-2,JP11-2,JP12-2) from each header into a mixer, run the output of the mixer to the audio input pin on the delay board, then just split the output of he delayboard however you want to, to the audio input pin on the delay board header (JP10-3,JP11-3,JP12-3), then you can set each tx level via the onboard pots. Not sure on the scom, have to look at a schematic. Thats the concept anyways. On Fri, May 14, 2010 at 2:49 PM, Jim (List) <[email protected]> wrote: I'm in the process of building a repeater that will have multiple ports (3 different radios). Only one radio be receiving at a time, the other two transmitting. Therefore I have 3 audio sources (from different types of radio, at different levels), each being fed to the other two radios and requiring individual settings. In the middle of this I want to put a delay board, but to keep the cost down only have one. What's the best arrangement for combining the incoming audio, and then setting the levels for each TX? Thinking along the lines of a FET audio mixer for each RX, setting all to the same level of input to the delay board, then something on the output from the delay (would I need another series of buffers, or would three 100k pots do?) to adjust the TX level for each radio type? Thanks for any advice! Jim
