Simran,
Here are the results of my quick test:
? ? ? ? ? ? ? ? ?Receive Current? ? ? ? ? USB Current? ? ? ? ?CW Current? ? ? ? CW Power Watts
12 volts? ? ? ? ? ?0.427? ? ? ? ? ? ? ? ? ? ? ? ? 1.5? ? ? ? ? ? ? ? ? ? ? ?1.77? ? ? ? ? ? ? ? ? ? ?3.9
13 volts? ? ? ? ? ?0.433? ? ? ? ? ? ? ? ? ? ? ? ? 1.6? ? ? ? ? ? ? ? ? ? ? ?1.86? ? ? ? ? ? ? ? ? ? ?4.9
14 volts? ? ? ? ? ?0.441? ? ? ? ? ? ? ? ? ? ? ? ? 1.7? ? ? ? ? ? ? ? ? ? ? ?1.93? ? ? ? ? ? ? ? ? ? ?6.0
All Current is in Amps
The frequency was 14.030 MHz
I used a GRPGuys SWR/Power/50load on the output for the power measurement and the dummy load.
There was no sound into the mic for the USB test.
NOTE:? I did not set up this rig.? My stock uBitx is on loan to a fellow ham to see how it works for CW (I am not a CW operator).? I am not sure why the USB current is so high.? If my memory serves when I did the stock uBitx it was around 0.9 amps (.7 without any bias).??This uBitx is not stock: The Raduino and Nano have been replaced with a Teensy board version.? This should only affect the total current draw, not the difference between the receive and the transmit.? It should still be in the ballpark.? Because it is not stock I did not want to raise the input voltage above 14volts.
You can see that the efficiency is not near 50%.? It is more like 19% to 22%.
On 80 meters with 12 volts in:
? ? ? ? ? ?Receive Current? ? ? ? ? LSB Current? ? ? ? ?CW Current? ? ? ? CW Power Watts
? ? ? ? ? ?0.429? ? ? ? ? ? ? ? ? ? ? ? ? 1.5? ? ? ? ? ? ? ? ? ? ? ? ?1.92? ? ? ? ? ? ? ? ? ? ?6.9
The above is for reference.
73
Evan
AC9TU
