One Year Later: let's start building

After some "time consuming considerations" (one year!) about the logic around the RF modules, such as DC feed lines, switches, earthing, ground loops, common mode line chokes, decoupling C's, feed-throughs and much more, I finally started to assemble the enclosure that I designed earlier.

The enclosure in a raw state - plastic protection, no panel holes yet. All
Aluminium plates and profiles are 2 mm thick and all nuts and bolts are stainless steel.

About logic: There will be one DC connector with 5 poles. Three different DC cords will be assembled. Of course, you can use one at a time, for different purposes. Cable 1 is for 12V DC sources. The 12 V DC will be lead to the internal linear 7805 converter. In this case, you can run either one of the receivers, or both simultaneously. Cable 2 is for 5 V DC sources which feed either one of the receivers - running two receivers is not enabled. Cable 3 is also for 5 V DC sources, but by short-cutting two poles of the chassis jack, running both receivers simultaneously is enabled. The latter is meant for using 5 V power supplies that are powerful enough to feed both receivers simultaneously.

Some switching and feeding logic

But as always: I may as well change everything while building the thing. And as long as it is a hobby project, everything is allowed!

Next step will be: A copper plated epoxy carrier board will be placed onto the bottom plate of the enclosure; This will be the underlayment for all circuitry. This underlayment will be galvanically connected to the enclosure at one single earth point.

Some parts that I may need



Waiting to be mounted...

Panel cut-out sketches. Has changed a zillion times already.
And no boss who complains! Hobbies are a sanctuary.