The 100K resister did the trick. Thanks much for the help 73 "Jim Duuuude" <telesistant@hotmail.com> wrote:
Not a big surprise. In that exact configuration, you're trying to make your radio "drink from a fire hose" as far as the audio level in concerned. A mic level is typically in the few millivolt range and the URI is in the hundreds of millivolt range, so some attenuation between the URI and the mic input of ANY radio is quite necessary.
As I recall putting a 100K resistor in series between the URI audio out and the MIC input of a modern Kenwood radio like that should do the trick (based upon the typical input impedance of a Kenwood radio). That's what we do with the TMG-707 and I have also done it with a D-700 and it worked well there.
JIM WB6NIL
From: Tremors834@aol.com Date: Wed, 6 Oct 2010 13:24:54 -0400 To: app_rpt-users@qrvc.com Subject: [App_rpt-users] (no subject)
Hello All, I'm running a simplex node, the radio itself handles any tone modulation. Its been said that the transmitted audio seems to be a bit too loud. The URI is interfaced to a Kenwood TM271- 2m radio. Wired direct from URI pins 22 (Left AC audio out) and 20 (GRD) to the MIC and GRD pins on the radio mic jack. I don't have any test/calibration equipment but I figured I could lower the Transmitted Audio setting using 'radio-tune-menu'. Problem is that I have the "Set Transmit Voice Level" setting all the way down to 15 (0-999) and the transmit audio still sounds loud. Here is Info from 'radio tune' Output A set to voice Output B set to off TX voice level set to 15 TX tone level set to 200 RX squelch set to 500
I'm wondering if I may need to attenuate the interface line between the URI and Radio. Suggestions anyone? Thanks, Gene KC2WDZ
_______________________________________________ App_rpt-users mailing list App_rpt-users@qrvc.com http://qrvc.com/mailman/listinfo/app_rpt-users =
-- Sent from my Android phone with K-9 Mail. Please excuse my brevity.