Hi All:

An update to my own post ;)

I moved the audio from E2 (AF Input) to E5 (modulator input) and made the appropriate changes in the usbradio config file.  The audio out of the repeater sounds a whole bunch better ... night and day difference!!

No need for a series resistor, since the T302 exciter schematic shows a 10K resistor in series with the E5 pad.

Thanks to Ken, KE2N, for confirming this off-list.

Cheers!

Ramesh, VA3UV

On 7/25/2016 1:23 PM, Ramesh Dhami (VA3UV) wrote:

Hi Guys:

Working on the 2nd 220 repeater project.  I have been feeding audio out of my fob into the 'E2 - AF Input' pin of a newer T302 (220MHz) exciter.  This exciter is replacing the former T301 exciter.

My issue is that the limiter on the exciter seems to be 'a little suspect' - I can set it to ~ 4.8k one day; set my TX levels and then the next day, I find that the limiter seems to have drifted off up to around 6k or even higher!

I have been using the E2 input for audio and E5 (modulator input) for PL tone.  I am planning on moving the audio input to E5, so essentially feeding E5 with composite voice and PL.  I did a quick search of the mailing list to see what others were doing.  I was able to find three posts (from Bryan Fields, Robert Poff and Sam Nabkey) referring to an "audio mod".  Is the "mod" just as I describe it above, or something more than that?

I see reference to a series resistor of 4.7K, so presumably this is inline with the composite audio / PL output when injecting into the modulator input?

Cheers,

Ramesh, VA3UV



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