That was the jumper I remember removing in the MII. It removed DC from the mic and I believe increased the gain of the audio TX stage in the radio when you did it??? ----- Original Message ----- From: "Bryan D. Boyle" <bdboyle@bdboyle.com> To: <app_rpt-users@ohnosec.org> Sent: Friday, August 16, 2013 6:53 AM Subject: Re: [App_rpt-users] Mastr II and URI low TX audio
On 8/16/2013 9:41 AM, Robert Poff wrote:
Yes, the microphone has an amplified cartridge. Hence MIC DC on the mic audio line. But the URI has a 10uf blocker cap on it's inputs and outputs if believe.
Actually, has both AC coupled and non-coupled (ie no cap) audio circuits
Pin 9 Mic In 10 Left Out
21 Mic In AC 22 Left Out AC
It's pretty plain from reading the schematic. BTW, you can use these URI to couple more than just transceivers and radio stuff to the asterisk software. Think outside the bun.
Bryan WB0YLE
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