With many thanks to Jay W5OLF here is a proper schematic of this little 10m FT8 RX. At one time I had a copy of SPlan so could create schematics properly although I have no idea where it is now!
I bought the crystal at low cost from 3rd Planet Solar in the USA. They have good stocks and currently are $1.50 each. I pulled the crystal down to 14.037MHz. If you can find a low cost source of 14.037MHz crystals, the inductor in series with the crystal probably won't be needed. I needed enough series inductance with the crystal to pull down 3kHz. Moulded chokes are probably fine in this application. I used a toroid inductor just because it was at hand.
Jay is working on a PCB and improvements.
No comments:
Post a Comment