Read first! I am no longer building this transceiver. Please check other interesting projects from Farhan on the discussion group, like HF-1 Transceiver, the replacement of the Minima and some cool RF jigs, Specan and Sweeperino. Also, since I’ve lost from both server and my drive the Eagle files of the PCBs, they will be no more available. Minima has become discontinued, check the group for more details. I will still keep the pdf files here for download for anyone still interested in hacking the rig.
First episode about building my Minima transceiver.
A few days ago I started to etch the boards and plant some components, and for the moment it looks super nice!
I just soldered all the resistors, except the two 22 ohms in the audio amplifier, and some caps, jumpers etc.
Still waiting for the Si570 from sdr-kits.net which I have ordered more than a month, although they said it was shipped on 30th of January.
Also the 100 pcs 20 MHz crystals from China!
I noticed that I didn’t left to much space for the electrolytic caps on the board, and if using bigger diameter type (6 mm), like I did here for the 47 uF ones, they touch other components. So I suggest using caps rated at lower voltage, like 25 V, even 16 V, with small diameter. The PCB design have 5 mm space for them.
Next to do is to finish the shopping cart for the rest of components and place the order.