[App_rpt-users] (no subject)

[Jim Duuuude]

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 at aol.com
Date: Wed, 6 Oct 2010 13:24:54 -0400
To: app_rpt-users at 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

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