Takatsuki 300B 2 different models, anyone noticed?

Hi,

I found out there are 2 different models??

If you look in the top of the tube you see models with square 'glasses 'and with oval 'glasses' inside.

Can't show the pictures because I don't know how to do that.

klappertjedundas12-02-2021 7:33pm

testpilot Details Discussions Posts This discussion Message User 985 posts 12-03-2021 at 01:53pm Copy Comment URL Report Comment Edit Delete @jasonbourne52 , the “glasses” are typically made from mica and are used to support and align the tube internals inside the glass envelope. In some instance, they may be attached to the getter.