Thursday 4 August 2016

LBS2 Project



Not much soldering going on these days, however the noodling process is ongoing.  This time I’m going to take my own advice and think out the entire project before etching boards and soldering components.  Might prove interesting.  I suspect that this process will prove to have a better end result but take much longer to get there.

The case for the LBS2 transceiver arrived the other day so I can now actually see how things can or cannot fit as envisioned.  I’ll mock up all the boards in cardboard and confirm the fit in the case.

Pretty much if not all the circuits are already done in Kicad and therefore only a re-work of the circuit board layouts will be required.  I was going to combine some boards but have decided against that in order to allow for full flexibility of modifications.  One change for sure will be space for an additional board for future expansion and another slot for another amplifier board to boost the power up to about 20-25watts or so.

The mother board will only have DCV traces etched and all rf and audio signals will be in coaxial cables.  AND I will be sure to leave one end of the shields open so as not to create ground loops.  A lesson well learned with LBS1.

All the boards except the control board, consisting of the dds, lcd and the Arduino, will be mounted via sockets on the motherboard.  I’m having a little trouble with the Nokia display so it may be time to plan for the colour touch screen modification.

Here’s a picture of the case. For $10 CAD I’m ok with it been plastic and not metal.  In fact for 10 bucks I should have ordered a couple.  Figure out a project for the case later. Hihi.

73, Peter