FT-8 with a RPi Zero W Given the FT-8 achievement maybe even QUISK would work on the RPi Zero W for a really small SDR Transceiver. But all that glitters is not Gold! The Zero does not work well with Chromium and even Firefox is an issue. So, it is a bare bones device, and you trade off the low cost with low performance. But for FT-8 this will do just FB. 73's Pete N6QW
If you dabble with homebrew then most likely at one time you have used a Dual Gate MOSFET (DGM) and Type 43 Ferrite Cores. Type 43 cores especially the FT 37-43 form the backbone of much of our homebrew gear. They show up as matching transformers or RF Chokes. The Type FT 82-43 can become a 2.5 Millihenry RF Choke with about 70 Turns of #28 enamel wire. Amidon is a short distance from my QTH -- about 70 miles but a standard shipping fee of $14 for $12 worth of product is not cost effective. The W8DIZ Kits and Parts is of course a great alternative especially since he is known as the Toroid King. But a funny thing showed up on my phone yesterday and that is that Digi-Key sells the Fair-Rite Toroid stock. Don't get too excited they only sell the ferrite side not powered iron. Below is a link to the equivalent FT-37-43 cores and 100 pieces are about 21 cents per unit. The Al values are the same so whatever turns are specified in the design will work with these Fair-Rite cores. Th