Having worked with the Planetary Pentacles via Radionics at least a few times it is curious to note that they each seem to have there own unique/specific charge or categoric function/spirits associated with them(which is obvious when one reads their descriptions). I think I recall someone saying this was due to the build up of power over the centuries from mages using them along with the qualities of the planet they fall under and of course the detail in the designs themselves have meaning.
For instance, in practice, I printed out a pentacle of Venus on parchment and kind of funneled my intent into it whilst opening it as one would a sigil(lines disappear, flashing, etc). In the interim, I had already dialed in a rate for a person I was wishing to influence on the witness plate. From there I just put the pentacle face down on the witness sample facing the sample and turned the box on(which has no power, btw, just an on switch wired into the circuit.lol!). I left that running overnight whilst sleeping and the next day when meeting the person in question, I was blown away by the effect the Venusian energies had created.
This is just one example from my work with this method you have described. The patterns already have power. It’s a good practice to acknowledge that power, according to what you want to achieve by gazing at it and its listed qualities and then funnel the desire into it. Once it’s charged like this then the radionics box just does its job by transmitting to the target, or if you have an amplifying pattern on the box like one of the circular patterns in Uncle Chuckies books, this also boosts the transmission with more power, so to speak.
I hope this helped in some way. I definitely found this method to yield results. I suppose you could just try using the pentacle without the charge and see how that works but I just felt it was necessary to be specific for my particular goal to funnel that into and command the pentacle for that purpose to make it pack more of a punch, and it did just that.