More good news
Here's a preliminary picture with the 16KP4A in the Sentinel chassis. I still need to do some tweaking of the focus coil, yoke etc. I'd say it's about 15% brighter and sharper than the other tube. I wonder if some of that is due to the dag coating which the other tube lacks.
I'm not sure which tube I'm going to leave in the set
Either way it's nice to have a spare
