Sunday, May 8, 2011

my ARRL Homebrew Challenge 3 entry, RX/TX audio, keying circuits, and microphone installed

Update on the HB3 radio for 10m/6m SSB/CW, in the breadboard stage.

Added a plate for all of the front panel controls.

RX audio signal chain works. TX audio signal chain works. Microphone installed. Microphone keying circuit works, radio will transmit -10 dBm PEP.

Next step:
Moving on to the side tone oscillator and CW keying circuit.

After that:
Will make the pre-driver board to get up to 1 watt or so TX.

Stay tuned for the latest updates.....