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Not a big surprise. In that exact configuration, you're trying to make your radio "drink from a fire hose" as far as<br>the audio level in concerned. A mic level is typically in the few millivolt range and the URI is in the hundreds<br>of millivolt range, so some attenuation between the URI and the mic input of ANY radio is quite necessary.<br><br>As I recall putting a 100K resistor in series between the URI audio out and the MIC input of a modern Kenwood<br>radio like that should do the trick (based upon the typical input impedance of a Kenwood radio). That's what<br>we do with the TMG-707 and I have also done it with a D-700 and it worked well there.<br><br>JIM WB6NIL<br><br><br><hr id="stopSpelling">From: Tremors834@aol.com<br>Date: Wed, 6 Oct 2010 13:24:54 -0400<br>To: app_rpt-users@qrvc.com<br>Subject: [App_rpt-users] (no subject)<br><br>
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<div>Hello All,</div>
<div> I'm running a simplex node, the radio itself
handles any tone modulation.</div>
<div>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.</div>
<div> 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.</div>
<div>Here is Info from 'radio tune'</div>
<div>Output A set to voice</div>
<div>Output B set to off</div>
<div>TX voice level set to 15</div>
<div>TX tone level set to 200</div>
<div>RX squelch set to 500</div>
<div> </div>
<div>I'm wondering if I may need to attenuate the interface line between the URI
and Radio. </div>
<div>Suggestions anyone?</div>
<div><font face="Arial" lang="0" size="2">Thanks,
Gene<br>KC2WDZ</font></div></font>
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