QCX assembly Rev 1.08
128
everything you read in this section should be interpreted as an INICATION only. Your actual
results may (and probably will) differ. The following information just gives a guide of very roughly,
what you might expect to see.
7.1
Equipment
For reference, and for the sake full disclosure, the following equipment was used in making these
measurements:
•
OWON XS3102A 12-bit 100MHz Digital Storage Oscilloscope
•
ADVANTEST R3361C 2.6GHz Spectrum Analyser with 50-ohm tracking generator
•
QRP Labs 50-ohm Dummy Load kit
http://qrp-labs.com/dummy
•
XONAR U5 24-bit external USB sound card
•
Argo and Spectran audio analysis software from
http://weaksignals.com
•
QRP Labs Ultimate3S for test signal generation
http://qrp-labs.com/ultimate3/u3s
•
Simple 14.000MHz battery-powered crystal oscillator signal generator
•
Two generic yellow DVMs
•
12V fixed power supply, and variable voltage bench supply
7.2
Transceiver current consumption
The current consumption of your radio may be an important consideration if you intend portable
battery-powered operation. Current consumption depends on supply voltage.
These measurements were carried out on a 40m band version of the kit. They will not differ much
for other bands. At 13.8V supply for example, current consumption is about 140mA on receive,
and almost 500mA on transmit.
At supply voltages above 13.8V, check the temperature of the 7805 voltage regulator, which may
need a heatsink as it dissipates more heat at higher supply voltages.
Summary of Contents for QCX 5W CW
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