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
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
_______________________________________________ App_rpt-users mailing list App_rpt-users@ohnosec.org http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users
To unsubscribe from this list please visit http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users and scroll down to the bottom of the page. Enter your email address and press the "Unsubscribe or edit options button" You do not need a password to unsubscribe, you can do it via email confirmation. If you have trouble unsubscribing, please send a message to the list detailing the problem.
Great to hear!! Good job Ke2n Loren Tedford (KC9ZHV) Phone: Fax: Email: lorentedford@gmail.com Email: KC9ZHV@KC9ZHV.com http://www.lorentedford.com http://www.kc9zhv.com http://forum.kc9zhv.com http://hub.kc9zhv.com http://Ltcraft.net <http://ltcraft.net/> http://voipham.com On Tue, Jul 26, 2016 at 6:47 AM, Ramesh Dhami (VA3UV) <Ramesh@va3uv.com> wrote:
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
_______________________________________________ App_rpt-users mailing list App_rpt-users@ohnosec.org http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users
To unsubscribe from this list please visit http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users and scroll down to the bottom of the page. Enter your email address and press the "Unsubscribe or edit options button" You do not need a password to unsubscribe, you can do it via email confirmation. If you have trouble unsubscribing, please send a message to the list detailing the problem.
_______________________________________________ App_rpt-users mailing list App_rpt-users@ohnosec.org http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users
To unsubscribe from this list please visit http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users and scroll down to the bottom of the page. Enter your email address and press the "Unsubscribe or edit options button" You do not need a password to unsubscribe, you can do it via email confirmation. If you have trouble unsubscribing, please send a message to the list detailing the problem.
participants (2)
-
Loren Tedford -
Ramesh Dhami (VA3UV)