I have built versions for 80m amd 40m and had QSOs with each. With something this simple there are compromises. The RX, in some cases, lacks selectivity and can be overloaded by strong broadcast stations. Nonetheless they do work and they are hard to beat for the price.
The cheapest I have seen is £1.35, which is less than the price of just 1 part if bought in the UK!
See https://sites.google.com/view/g3xbm4/home/hf-mf-and-lf/homebrew/8040m-pixie-and-micro80-transceivers .
Never has there been enough information on the Pixie, the little PCB with a big input of info.
ReplyDeleteSverre Holm has some interesting mods and fixes for the Pixie:
https://la3za.blogspot.com/search/label/Pixie2
Also there is the Pixie file from G-QRP club:
https://www.gqrp.com/The_Sprat_Pixie_File.pdf