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IC FR4000 flat audio for MMDVM and DMR conversion?

Pierre Martel All Messages By This Member #214122 I never worked with an IC FR4000 and I had a request to help a group of ham make a DMR repeater from a FR4000. ? To do it, we need to have flat audio in and out. and I was able to find the information for the TX section. But the RX I am not sure.? ? ? the way I see it, Pin 9 is ok for the TX side?? and pin 12 is ok for the RX side?? ? Anyone ever used that repeater for DMR? ? Thanks ? Pierre VE2PF
Chris Boone WB5ITT All Messages By This Member #214134 Looking at the manual that you provided, you have the correct point marked Chris WB5ITT toggle quoted message Show quoted text On Thu, Mar 27, 2025, 8:57 PM Pierre Martel via <petem001=[email protected]> wrote: I never worked with an IC FR4000 and I had a request to help a group of ham make a DMR repeater from a FR4000. ? To do it, we need to have flat audio in and out. and I was able to find the information for the TX section. But the RX I am not sure.? ? ? the way I see it, Pin 9 is ok for the TX side?? and pin 12 is ok for the RX side?? ? Anyone ever used that repeater for DMR? ? Thanks ? Pierre VE2PF
Ramesh Dhami \(VA3UV\) All Messages By This Member #214139 开云体育 On 2025-03-28 6:22 a.m., Chris Boone WB5ITT via groups.io wrote: Looking at the manual that you provided, you have the correct point marked Chris WB5ITT On Thu, Mar 27, 2025, 8:57 PM Pierre Martel via <petem001=[email protected]> wrote: I never worked with an IC FR4000 and I had a request to help a group of ham make a DMR repeater from a FR4000. ? To do it, we need to have flat audio in and out. and I was able to find the information for the TX section. But the RX I am not sure.? ? ? the way I see it, Pin 9 is ok for the TX side?? and pin 12 is ok for the RX side?? ? Anyone ever used that repeater for DMR? ? Thanks ? Pierre VE2PF <-- Hi Pierre:? Something in the back of my cranial filing cabinet tells me that this repeater is not suitable for digital use.? I'd check to ensure the exciter is a true FM exciter (not PM), and there's no AGC, etc. Cheers! Ramesh, VA3UV, WA3UV
Bob Dengler All Messages By This Member #214142 At 3/28/2025 03:22 AM, you wrote: Looking at the manual that you provided, you have the correct point marked Chris WB5ITT "Splutter filter"?? Must be related to the "Lipple Filter" found in many Kenwood service manuals ;) Bob MO6V

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