QRP Frontend 02
Final test with the Arduino Mega controlling
the i2C buss(select Filter and set attenuator Tx/Rx, turn Rx amplifier on/off.
QRP Frontend 02 is a BP filter board
with RX preamplifier MAR-6 or a discreet PIN-diode attenuator, controlled by a
dac. The same BP filter and the attenuator is used in Tx and is driving a
amplifier SGA-3486Z as driver for the QRP PA earlier described. All BP filter is controlled from I2C
bus. BP filter is from YU1LM
I has started working on a front panel board,
the latest before putting all this together to a QRP Transceiver. Stay tuned!
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