RF Circuits

The step by step build will be documented here ...




The empty PCB of the new TRX, note the isolation of the USB/Si570 from the RF on TRX board

The build process loosely follows (photos and details to be inserted):

Inventory the kit
Build and test the 12, 5 and 3.3 Vdc power supplies
Build and test the USB
Build and test the Si570 Local Oscillator
Build and test the Isolation
Build and test the Dividers
Build and test the RX OpAmps
Build and test the RX Mixer(QSD)
Build and test the RX BPF(s) (L4);
Build and test the TX OpAmps
Build and test the TX Mixer (QSE)
Build and test the PTT circuits
Build and test the RX Switching circuits
Build and test the PA/Filter(s) (L2/L3)
Install the External Connectors (those not be placed before anyway)