I found no mention online about current draw of the Ukrainian 29/70 transverter: my specimen drains about 24 mA at 12V in reception.
More to follow, especially a TX test once I found what is a suitable heatsink: just the containing box (yet undefined) or something larger?!
If everything works, the construction of a simple sequencer will follow. Most probably based on one of my (I)FR(K) projects.