On Fri, Mar 8, 2019 at 9:09 AM iz oos <and2oosiz2@...> wrote:
Good piece of information. How can I measure 50mV in the audio frequencies? I have a Velleman 0-100mV 1khz audio generator kit, but a cheap multimeter does not show a thing. I hope I don't need an oscilloscope or an SA for measuring it...
Il 07/mar/2019 07:35, "Ashhar Farhan" <farhanbox@...> ha scritto:
the ubitx has more gain on tx as well as rx than the previous boards. this is due to the BFR93w transistors in the 45 MHZ IF in place of the 2N3904s.?
The carrier and spurs will be appear to be higher if the tx gain (controlled by RV1) is running flat out. it is best to reduce this to about 60% of the full gain. A way to know this is to connect a 50 mv audio signal to the mic, transmit SSB on 7 MHz and reduce the power until it is around 7 watts.
