Thanks for the replies thus far.
I should have posted this pic to give a better idea as to the size of the Model 777.
One cannot tell how small it really is from the closeup. Anyway, these normally do not sit on
the kitchen table. I am rearranging and cleaning up my work benches and hauled these up
from the basement.
The 777 is holding down the Fluke 8500A. Next to it is my homebrew plus/minus 5V to 20V power supply
that's getting close to 40 years old. Never had to fix it thus far. On top of the power supply is
the latest Nixie tube piece of gear, a Fairchild Model 7050 3.5 digit VOM. A better pic of the Fairchild
7050 is in the "Let'see your Nixie tube equipment" thread.
Last but not least is the Analog Devices AD688 Precision Reference chip. It is not as accurate as
the LTZ1000, but good enough for me. I do not need super precision (as of today)...
Who knows, maybe tomorrow ?
I forgot to mention that I have a copy of the service manual for the Phaostron 777.
If anyone wants a copy, let me know by PM.