As mentioned before I also do not know of nor have I ever heard of a TXRX that had built in diagnostic tools such as you suggest. I suspect it is not a matter of cost so much as real estate and coding and accessories to connect to the 'tools'; probes, jumpers, etc. This in turn greatly complicates the 'boxing' of the radio adding the cost of connectors and jacke etc.? Anyone who is at all serious about experimenting with the BITXxx or other projects has or will need to start getting the basic instruments to look at circuits independently of and in addition to the BITX. Those not interested in more than operating the radio will not be bothered with more than needing a soldering iron and wire cutters/strippers. Adding the circuits you suggest to the main board serves only to complicate further the traces and layout for the beginner.
My opinion for what its worth.
PJH, N7PXY
