I should have said you need to subtract the Tx idle current instead of the Rx idle current.
Sent from an iPhone, don't ask whose.
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On Nov 1, 2018, at 12:13 PM, Clark Martin <kk6isp@...> wrote:
You also need to subtract the Tx idle current. You can find this by keying up the mic with no audio input. This current is mainly the bias current in the finals but also the relays and some other things. The Tx idle current will vary with band.
On Nov 1, 2018, at 11:07 AM, Joe Puma <kd2nfc@...> wrote:
Hey guys,
I will probably have a watt meter in the coming weeks but I still haven¡¯t measured my power out on the uBitx. So with a dummy load hooked up I took some power measurements with my DMM. I am not sure if this is a good way to tell power output but here are some measurements.
Voltage is 12.67 Radio idle and 12.45 while Tx¡¯ing. not sure which one matters most when calculating power or if the difference is negligible but I calculated wattage from the 12.45v
band current watts
80 2.18 27.14
60 1.50 18.67
40 1.97 24.52
30 1.42 17.67
20 1.65 20.54
17 1.22 15.18
15 1.15 14.31
10 1.0 12.45
If I take into consideration the .33a for radio idle (4w) is my RF wattage 4w less then my measurements.
Clark Martin
KK6ISP
Another Designated Engineer on the Information Super Railway.
