BASIC Tech Group - MyNews 11 - Final BPF, QRP_RIG & RF METER PCBs

Well I've taken the plunge, or in other words ordered my Christmas present! I have ordered the PCBs for three of my projects. Yes three!

The BPF-Basic - note: this abandoned as doesn't work...

This is a set of three Band Pass Filters for 40, 30 & 20m bands. Intended for use both for the front end for the QRP_RIG TXRX, the DCRX Direct Conversion RX, or any other input/output that needs a BPF on one of the bands.





The QRP_RIG-Basic a single board TXRX

This has been on of my long term aims, to build a single board Arduino shield which is an SDR based TX and RX able to work over a wide band of frequencies - is it a broadband design, the working frequency is determined by the DDS input and BPF on the input/output.





An RF METER-Basic - schematic updated, see later blog

A sensitive RF Meter with RF output also from the DDS via a LPF and buffer amplifier

This is one of the most useful measurement tools for an amateur shack, able to measure RF inputs, to 50R impedance, from -60dBm to more than +20dBm. And an RF source at around 1-10mW programmable by the Arduino from 100kHz to 20MHz.





Let's hope these work first time as the PCB costs are going up as the UK Pound falls - they come from Eurocircuits in Belgium, one fo the few PCB makers that accept Eagle "BRD" file inputs.