Yes, I will use an oscilloscope to view the frequency.
The current is high even without microphone, but only in USB.
Thanks.
Dr. José Carlos León Ortega
UDI- Universidad para el Desarrollo y la Innovación
Tel. (591 3) 3422525 Santa Cruz - Bolivia
El jueves, 4 de junio de 2020 04:28:53 p.?m. GMT-4, Wald N4PL via groups.io <n4pl@...> escribió:
Jose,
Fred has a good point.? It would be good to know what your rig is putting out in GEN mode.? You were saying it was drawing a significant current.? If it were generating a real USB signal, the current should be zero (actually, the idle current, with no mic audio).?
It would be great if you could connect a spectrum analyzer or a frequency counter after the dummy load.? Yes, this could be self-oscillations.
Let us know of your progress.
73, Wald N4PL
On Thursday, June 4, 2020, 12:02:21 PM EDT, jose carlos leon via groups.io <josecarlosleon48@...> wrote:
Are you thinking on autooscilations)?
Thanks, good hint.
Dr. José Carlos León Ortega
UDI- Universidad para el Desarrollo y la Innovación
Tel. (591 3) 3422525 Santa Cruz - Bolivia
El jueves, 4 de junio de 2020 11:36:08 a.?m. GMT-4, Fred_N8YX <n8yx@...> escribió:
Put a dummy load and a frequency counter on the antenna connector.
