8673D is making RF and working as expected. No more leveling problems. Fan (after first minute or so) sounds OK.
Remaining problem (which existed before, and I will address in future) is very low output in the 10 MHz - 2 GHz range (which uses the lower section.) This problem has existed for the time I've had the unit, and I haven't wanted to tackle repair (as I also have HP 8660 series generator and nowadays a TinySA can reasonably suffice).
Now that I have experience with the unit's (partial) disassembly (and some tools to help move the literal boat anchor around in the workshop), I'll revisit the 10 MHz - 2 GHz issue at some point and report on that adventure.
Thanks for the bandwidth!
