Some years ago, SDR-Kits used to sell a small prototyping PCB perfect for experimenting with a Vector Network Analyzer. After many experiments, the female pin headers on my prototyping board wore out. Since SDR-Kits no longer sells it, I designed my version of this PCB. The KiCad sources of the VNA prototyping/test board are available on my Github profile.
Both ICOM radios, the IC7300 and the IC9700 allow a variable transmission (TX) delay. This comes in handy if external peripherals like amplifiers and/or pre-amplifiers are used. These devices often have slow mechanical relays. It is good practice to wait until the complete transmission chain is ready before RF is applied. Out of curiosity, I measured and verified the adjustable tx delay on both radios.