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) jim.l...@stuckinthemud.orgwrote: 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
Re: [Repeater-Builder] Techniques for combining multiple audio sources
Hi Jeff, what are you using? are Arcom? or Scom? I exchanged messages with Jim. He's building his own control system. 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. In the 7330 each RX input has its own audio delay and each TX output has its own 3-input mixer with a driver amp and level pot. No mods needed. 73, Bob Bob Schmid, WA9FBO, Member S-COM, LLC PO Box 1546 LaPorte, CO 80535-1546 970-416-6505 phone 970-419-3222 fax www.scomcontrollers.com -Original Message- From: Jeff Ackerman kg6u...@gmail.com To: Repeater-Builder@yahoogroups.com Sent: Sun, May 16, 2010 2:08 am 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) jim.l...@stuckinthemud.org 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
RE: [Repeater-Builder] Techniques for combining multiple audio sources
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: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Jeff Ackerman Sent: 16 May 2010 09:09 To: Repeater-Builder@yahoogroups.com 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) jim.l...@stuckinthemud.org 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
RE: [Repeater-Builder] Techniques for combining multiple audio sources
At 02:19 PM 5/16/2010, Jim \(List\) wrote: 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. ---A simple resistive combiner should work BUT REMEMBER THAT THE RADIOS MUST GATE THE AUDIO DELIVERED TO THE COMBINING NETWORK. If they don't, you cannot combine them Of course this presumes each radio can supply enough level. If not you'll need something like a summing amp (using an op amp is the easiest way to implement this). The RAD expects 1 volt p-to-p max do don't overdrive it. Ken -- President and CTO - Arcom Communications Makers of repeater controllers and accessories. http://www.arcomcontrollers.com/ Authorized Dealers for Kenwood and Telewave and we offer complete repeater packages! AH6LE/R - IRLP Node 3000 http://www.irlp.net We don't just make 'em. We use 'em!
[Repeater-Builder] Techniques for combining multiple audio sources
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
