Update 18.6.21: Sadly little progress throughout March-June (waiting for Si5351's). Anyone wishing to build a V2 kit who already has a 10-pin Si5351A-B-GT is welcome to do so - just contact me on the usual email (timbly123 at ntlworld dot com). Software is done.
Update 14.5.21: Still no sign of the Si5351 parts arriving. For now I am just going to carry on boxing up my Mk 2 as a portable receiver. Current plans are to squeeze it into a Hammond RP1175C, a plastic 185x85x55mm case with a transparent lid. If this is successful it will avoid having to make a clear window for the LCD display. I also propose mounting the Discovery board closer to the panel so that the LCD display does not have to be lifted and refitted. This will require very low-profile tactile pushbuttons if they are to fit between the Discovery and the front panel. Yes, I am now experiencing delays getting hold of push buttons!!!
Update 9.4.21: I finally get round to attaching the HA8LFK bandpass filter board. 4 x M2 pillars are used (5mm pillar with washers totalling 7mm) to secure the filter board and 8 wires to the 'presel' connector. Select filter type E in the menu and away it goes :o) The overall receiver module is very compact, although the edge-mount SMA connectors are going to have to be removed to fit it into a small 'portable receiver' sized box. Work on the CAT control interface has now resumed.
Update 5.4.21: First V2 kit has shipped! The first batch is ready to go but I only have 2 Si5351s; I am still waiting for the order I placed in early Feb to arrive.Older updates
This project still requires soldering of 0603-size SMD components and a couple of fine-pitched ICs. It now includes a QFN-20 RF IC which is not too difficult with the correct soldering technique.Notes/advice on QFN soldering.
Kits will be available soon - watch this space.
The PCB can be seen here
Video 1: Sample of 80m SSB, 26.2.2021
Video 2: Tuning around 20m SSB + using the notch filters, 7.3.2021